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  • Microsoft Build 2012 Day 1 Keynote Summary

    - by Tim Murphy
    So I have finally dried the tears after watching the Keynote for Build 2012.  This wasn’t because it was an emotional presentation, but because for the second year I missed the goodies.  Each on site attendee got a Surface RT, a Lumia 920 and a voucher for 100GB of SkyDrive storage. The event was opened with the announcement that in the three days since the launch of Windows 8 over 4 million upgrades have been sold.  I don’t care who you are that is an impressive stat.  Ballmer then spent a fair amount of time remaking the case for the Windows and Windows Phone platforms similar to what we have heard over the last to launch events. There were some cool, but non-essential demos.  The one that was the most fun was the Perceptive Pixel 82” slate device.  At first glance I wondered why I would ever want such a device, but then Ballmer explained it’s possible use for schools and boardrooms.  The actually made sense. Then things got strange.  Steve started explaining features that developers could leverage.  Usually this type of information is left to the product leads.  He focused on the integration with the Charms features such as Search and Share. Steve “Guggs” Guggenheim showed off an app that would appeal to my kids from Disney called “Agent P” which is base on Phineas and Ferb.  Then he got to the meat of the presentation.  We found out that you could add a tile that can be used to sell ad space.  In the same vein we also found out that you could use Microsoft’s, Paypal’s or any commerce engine of your own creation or choosing. For those who are interested in sports and especially developing sports apps you would have found the small presentation from Michael Bayle of ESPN.  He introduced the ESPN app which has tons of features.  For the developers in the crowd he also mentioned that ESPN has an API available at developer.espn.com. During the launch events we were told apps were coming.  In this presentation we were actually shown a scrolling list of logos and told about a couple of them.  Ballmer mentioned specifically Twitter, SAP and DropBox.  These are impressive names that were just a couple of the list impressive names. Steve Ballmer addressed the question of why you should develop for the Windows 8 platform.  He feels that Microsoft has the best commercial terms for developers, a better way to build apps than other platforms and a variety of form factors.  His key point though was the available volume of customers given the current Windows install base and assuming even a flat growth of the platform.  This he backed with a promise that Microsoft is going to do better at marketing and you won’t be able to avoid the ads that they are bringing out. The last section of the key note was present by Kevin Gallo from the Windows Phone team.  This was the real reason I tuned into the webcast.  He impressed upon those watching that the strength of developing for the Microsoft platform is the common programming model that now exist.  While there are difference between form factor implementations you can leverage code across them. He claimed that 90% of developer requests for Windows Phone 8 had been implemented.  These include: More controls with better performance Better live tiles including lock screen integration Speech support in custom apps Easier submission to the market place App camera integration VOIP and chat support Bluetooth and NFC support Native C++ development Direct 3D development   The quote from Kevin that stood out for me was that “Take your Dramamine and buckle your seatbelt type of games are coming to Windows Phone 8”.  He back this up by displaying a list of game development frameworks and then having Unity come out and do a demo. Ok, almost done … The last two things of note for me were the announcement that the SDK is immediately available at dev.windowsphone.com and that they were reducing the cost of an individual developer account to $8 for the next 8 days. Let the development commence. del.icio.us Tags: Build 2012,Windows 8,Windows Phone 8,Windows Phone

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  • Production Access Denied! Who caused this rule anyways?

    - by Matt Watson
    One of the biggest challenges for most developers is getting access to production servers. In smaller dev teams of less than about 5 people everyone usually has access. Then you hire developer #6, he messes something up in production... and now nobody has access. That is how it always starts in small dev teams. I think just about every rule of life there is gets created this way. One person messes it up for the rest of us. Rules are then put in place to try and prevent it from happening again.Breaking the rules is in our nature. In this example it is for good cause and a necessity to support our applications and troubleshoot problems as they arise. So how do developers typically break the rules? Some create their own method to collect log files off servers so they can see them. Expensive log management programs can collect log files, but log files alone are not enough. Centralizing where important errors are logged to is common. Some lucky developers are given production server access by the IT operations team out of necessity. Wait. That's not fair to all developers and knowingly breaks the company rule!  When customers complain or the system is down, the rules go out the window. Commonly lead developers get production access because they are ultimately responsible for supporting the application and may be the only person who knows how to fix it. The problem with only giving lead developers production access is it doesn't scale from a support standpoint. Those key employees become the go to people to help solve application problems, but they also become a bottleneck. They end up spending up to half of their time every day helping resolve application defects, performance problems, or whatever the fire of the day is. This actually the last thing you want your lead developers doing. They should be working on something more strategic like major enhancements to the product. Having production access can actually be a curse if you are the guy stuck hunting down log files all day. Application defects are good tasks for junior developers. They can usually handle figuring out simple application problems. But nothing is worse than being a junior developer who can't figure out those problems and the back log of them grows and grows. Some of them require production server access to verify a deployment was done correctly, verify config settings, view log files, or maybe just restart an application. Since the junior developers don't have access, they end up bugging the developers who do have access or they track down a system admin to help. It can take hours or days to see server information that would take seconds or minutes if they had access of their own. It is very frustrating to the developer trying to solve the problem, the system admin being forced to help, and most importantly your customers who are not happy about the situation. This process is terribly inefficient. Production database access is also important for solving application problems, but presents a lot of risk if developers are given access. They could see data they shouldn't.  They could write queries on accident to update data, delete data, or merely select every record from every table and bring your database to its knees. Since most of the application we create are data driven, it can be very difficult to track down application bugs without access to the production databases.Besides it being against the rule, why don't all developers have access? Most of the time it comes down to security, change of control, lack of training, and other valid reasons. Developers have been known to tinker with different settings to try and solve a problem and in the process forget what they changed and made the problem worse. So it is a double edge sword. Don't give them access and fixing bugs is more difficult, or give them access and risk having more bugs or major outages being created!Matt WatsonFounder, CEOStackifyAgile Support for Agile Developers

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  • Games development with a game loop that's abstracted away

    - by Davy8
    Most game development happens with a main game loop. Are there any good articles/blog posts/discussions about games without a game loop? I imagine they'd mostly be web games, but I'd be interested in hearing otherwise. (As a side note, I think it's really interesting that the concept is almost exclusively used in gaming as far as I'm aware, perhaps that may be another question.) Edit: I realize there's probably a redraw loop somewhere. I guess what I really mean is a loop that is hidden to you. Frames are something you as the developer are not concerned with as you're working on a higher level of abstraction. E.g. someLootItem.moveTo(inventory, someAnimatationType) and that will move from the loot box to your inventory using the specified animation type without the game developer having to worry about the implementation details of that animation. Maybe that's how "real" games end up working, but from reading most tutorials they seem to imply a much more granular level of control is used, but that might just be an artifact of being a tutorial. Edit2: I think most people are misunderstanding what I'm trying to ask, likely because I'm having trouble describing exactly what I'm trying to ask. After some more thinking perhaps what I'm referring to is more along the lines of what I believe is referred to as "scripting" where you're working at a very high level and having some game engine take care of the low level details. For example, take custom maps in Starcraft II or Warcraft III. Many of the "maps" have gameplay that deviates enough from the primary game that they could be considered a separate game written on the same engine. What I'm referring to then is along those lines. I may be wrong because I only dabbed in the Warcraft III editor, but as far as I remember no where in the map editor do you control the game loop, and yet you can create many different games out of it. In my mind, these are games in their own right. If you're playing DotA you don't say you're playing Warcraft III, you say you're playing DotA because that's the actual game you're playing. Such a system may impose limitations that don't exist if you're creating a game from scratch, but it greatly reduces development time because much of the "hard" work has already been done for you. Hopefully that clarifies what I'm asking. Another example of what is I mean, is when you write a web app, of course it communicates through sockets and TCP. But does the average web developer doesn't explicitly write code for connecting sockets. They just need to know about receiving a request and sending a response. There are unique scenarios where you do occasionally need to use raw sockets, but it's generally rare in web development. In a similar fashion, it's very possible to write a game without directly using the game loop, even though one is used behind the scenes. Probably not a AAA title, but there must be hundreds of smaller scale games that can and possibly are written this way. Are there any good resources on writing these "simpler" games?

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  • SQL SERVER – Unable to DELETE Project in Data Quality Projects (DQS)

    - by pinaldave
    Here is the email which made me write this blog post. When I write a blog post I write keeping in mind that if the developer is not familiar with the concept he will attempt this on the development server. If due to any reason you attempt it on any other server than your personal server, developer should make sure to have complete confidence on his own expertise and understand the risk behind it.  Well, let us read the email which I received. I have modified it a bit to remove information related to organizational and individual. “I just read your blog post on Beginning DQS. I went ahead and followed every single screenshot and it worked fine. I was able to execute the DQS project successfully. However, the same blog post got me in trouble – a serious trouble. After first successful deployment I went ahead and created a few of my own knowledge base and projects. I played around a bit and then decided to get back to real work. Now we had deployed DQS on production server only, so experiment on production server. Now, when I got back to my work, I forgot to close all the windows. My manager found the window open and have seen my test projects. He has asked me to delete my experiments immediately and have said words which I cannot write to you. Here is the problem. I am not able to delete the project which I have created earlier. I am able to open it and play with it but the delete option is disabled and grayed out (see attached image). Now I believe there is nothing wrong with this project as it was just a test project. Would you please write to my manager that it is not harmful to leave that project there as it is? It is also not using any resources. I think he will believe you.” As I said this kind of email makes me uncomfortable. I do not want someone to execute anything on production server. I often write notes and disclaimer on my post when something is dangerous to execute on production server. However, if someone is not expert with SQL Server and attempts something new on production server, I think the major issue is here with the person (admin) who gave new developer permission to production server. This has to be carefully avoided. Here was my response to the individual. “I cannot write to your manager anything as he has not asked me anything. Honestly I believe he is correct in his behavior as you should have not executed anything on the production server without prior approval and testing on the development server. Any R&D must be done on local box or development box. I suggest you request your manager to prevent access to users who does not need access. If he is a good manager, he might have already implemented by now recent event. I also see your screenshot. Here is the issue: While you were playing with project, you might have closed the project half the way, without completing it. Due to the same reason it is locked. You can open and continue from the same place where you have left the project. If you do not need the project any more. Right click on it, click on unlock the project. This will enable the DELETE option and now you can delete the project. Next time, be safe out there. It may be dangerous to have admin access to production server when not needed.“ I have yet not heard from him but I believe he will take my words positively. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology Tagged: Data Quality Services, DQS

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  • Antenna Aligner Part 7: Connecting the dots

    - by Chris George
    The app is basically ready, so I eagerly started to sort out creating the application entry in iTunes Connect. It's mostly intuitive actually, although I did have to create yet another icon for iTunes sized 512x512 pixels, damn lucky I did the original graphics as vector! It took me longer to write the application description than anything else, I'm so not a tech author! I didn't like the way you have to 'make up' an SKU (Stock Keeping Unit) number. I have to do some googling to find out that it really doesn't matter what it is! It should be more obvious what to do from the actual website itself. That aside, the rest of it was actually fairly straightforward. As well as the details of the application, iPhone and iPad screenshots were also required. This posed somewhat of a problem. The iPhone ones were easy (as I have one!), but I do not (yet) own an iPad . So I thought I'd leave the iPad screenshots out for now. Once the application details were sorted, I moved onto the rights and pricing. At the start of the project I had made the decision that I wouldn't charge any more than the lowest amount £0.59. I believe there is a market for this, but as my first foray into app development I didn't want to take the mick. I did realise, however, that I had built my app with a developer certificate and provisioning profile. This was fairly quickly corrected, and again Nomad made this very easy to switch over to the distribution certificate and provisioning profile. With a sense of excitement I cracked open iTunes connect and clicked the upload button ... ...slight snag... . when the Nomad project was started, Apple allowed uploads of these binaries via iTunes Connect. But this is no longer possible, the only upload path is via the Application Loader available from the Apple Developer program. This itself has one limitation, it only runs on a mac! D'OH!!!  Actually my language was somewhat more colourful when this fact came to light. After picking my laptop up off the floor and putting it back together... ok only joking, but I did nearly throw it out of frustration!... I started to consider the options; I briefly entertained the idea of buying a cheap mac from ebay... no, that defeats the whole object of what I'm doing, plus my wife wouldn't be impressed there are some guys out there in the interweb who will upload your app for a small fee...but I don't really like the idea of giving some faceless email address my apple developer login details, as well as my app binary! find some willing friend with a mac who would kindly let me use it... obviously this is the only sensible option. In the meantime, I informed the Nomad team about this slight 'issue' and they are currently investigating possible solutions...

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  • MPI Cluster Debugger launch integration in VS2010

    Let's assume that you have all the HPC bits installed and that you have existing MPI code (or you created a "Hello World" project using the MPI project template). Of course, you create a single MPI application and at runtime it will correspond to multiple processes (of the same app) launched on multiple nodes (i.e. machines) on the cluster. So how do you debug such a situation by simply hitting the familiar "F5" keystroke (i.e. Debug - Start Debugging)?WATCH IT INSTEAD OF READING ABOUT ITIf you can't bear to read through all the details below, just watch this 19-minute screencast explaining this VS2010 feature. Alternatively, or even additionally, keep on reading.REQUIREMENTWhen you debug an MPI application, you would want the copying of resources from your client machine (where Visual Studio is installed) to each compute node (where Windows HPC Server is installed) to take place automatically for you. 'Resources' in the previous sentence includes your application binary, plus any binary or data dependencies it may have, plus PDBs if needed, plus the debug CRT of the correct bitness, plus msvsmon for remote debugging to work. You would also want, after copying is complete, to have your app and msvsmon launched and attached so that you can hit breakpoints back in Visual Studio on your client machine. All these thing that you would want are delivered in VS2010.STEPS TO F51. In your MPI project where you have placed a breakpoint go to Project Properties - Configuration Properties - Debugging. Ensure the "Debugger to launch" combo box value is set to MPI Cluster Debugger.2. There are a whole bunch of properties here and typically you can ignore all of them except one: Run Environment. By default it is set to run 1 process on your local machine and if you change the number after that to, for example, 4 it will launch 4 processes of your app on your local machine.You want this to run on your cluster though, so go to the dropdown arrow at the end of the Run Environment cell and open it to expose the "Edit Hpc node" menu which opens the Node Selector dialog:In this dialog you can enter (or pick from a list) the cluster head node name and then the number of processes you want to execute on the cluster and then hit OK and… you are done.3. Press F5 and watch your breakpoint get hit (after giving it some time for copying, remote execution, attachment and symbol resolution to take place).GOING DEEPERIn the MPI Cluster Debugger project properties above, you can see many additional properties to the Run Environment. They are all optional, but you may want to understand them in order to fine tune your cluster debugging. Read all about each one of these on the MSDN page Configuration Properties for the MPI Cluster Debugger.In the Node Selector dialog above you can see more options than just the Head Node name and Number of Process to run. They should be self-explanatory but I also cover them in depth in my screencast showing you an example of why you would choose to schedule processes per core versus per node. You can also read about these options on MSDN as part of the page How to: Configure and Launch the MPI Cluster Debugger.To read through an example that touches on MPI project creation, project properties, node selector, and also usage of MPI with OpenMP plus MPI with PPL, read the MSDN page Walkthrough: Launching the MPI Cluster Debugger in Visual Studio 2010.Happy MPI debugging! Comments about this post welcome at the original blog.

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  • What Color is your Jetpack ?

    - by JoshReuben
    I’m a programmer, Im approaching 40, and I’m fairly decent at my job – I’ll keep doing what I’m doing for as long as they let me!   So what are your career options if you know how to code? A Programmer could be ..   An Algorithm developer Pros Interesting High barriers of entry, potential for startup competitive factor Cons Do you have the skill, qualifications? What are working conditions n this mystery niche ? micro-focus An Academic Pros Low pressure Job security – or is this an illusion ? Cons Low Pay Need a PhD A Software Architect Pros: strategic, rather than tactical Setting technology platform and high level vision You say how it should work, others have to figure out why its not working the way its supposed to ! broad view – you are paid to learn (how do you con people into paying for you to learn ??) Cons: Glorified developer – more often than not! competitive – everyone wants to do it ! loose touch with underlying tech in tough times, first guy to get the axe ! A Software Engineer Pros: interesting, always more to learn fun I can do it Fallback Cons: Nothing new under the sun – been there, done that Dealing with poor requirements, deadlines, other peoples code, overtime C#, XAML, Web - Low barriers of entry –> à race to the bottom A Team leader Pros: Setting code standards and proposing technology choices Cons: Glorified developer – more often than not! Inspecting other peoples code and debugging the problems they cannot fix Dealing with mugbies and prima donas Responsible for QA of others A Project Manager Pros No need for debugging other peoples code Cons Low barrier of entry High pressure Responsible for QA of others Loosing touch with technology A lot of bullshit meetings Have to be an asshole A Product Manager Pros No need for debugging other peoples code Learning new skillset of sales and marketing Cons Travel (I'm a family man) May need to know the bs details of an uninteresting product things I want to work with: AI, algorithms, Numerical Computing, Mathematica, C++ AMP – unfortunately, the work here is few & far between. VS & TFS Extensibility, DSLs (Workflow , Lightswitch), Code Generation – one day, code will write code ! Unity3D, WebGL – fun, fun, fun ! Modern Web – Knockout, SignalR, MVC, Node.Js ??? (tentative – I'll wait until things stabilize as this area is undergoing a pre-Cambrian explosion) Things I don’t want to work with: (but will if I'm asked to !) C# – same old, same old – not learning anything new here Old code – blech ! Environment with code & fix mentality , ad hoc requirements, excessive overtime Pc support, System administration – even after 20 years, people still ask you to do this sometimes ! debugging – my skills are just not there yet Oracle Old tech: VB 6, XSLT, WinForms, Net 3.51 or less Old style Web dev Information Systems: ASP.NET webforms, Reporting services / crystal reports, SQL Server CRUD with manual data layer, XAML MVVM – variations of the same concept, ad nauseaum. Low barriers of entry –> race to the bottom.  Metro – an elegant API coupled to a horrendous UX – I'll wait for market penetration viability before investing further in this.   Conclusion So if you are in a slump, take heart: Programming is a great career choice compared to every other job !

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  • Seeking advice on tools and technology for my new game [closed]

    - by k.k. slider
    I'm a C# developer who has been programming a game in my spare time using XNA and Visual Studio. The game's logic is mostly done and I've completed a prototype that has most of the functionality of (what I envision to be) the final game. However, having heard about the uncertain future and (possibly) limited audience for XNA games, I'm looking to switch platforms... but I don't know what technology would best suit my needs. Below are some specifics about my game and what exactly I'm looking for, if you're interested: The game is a 2D turn-based tactical RPG (strategy game) for two players. It is a basic sprite and tile based game with animations and sound. 3D capabilities are not necessary. I'd like to allow players to compete with others online, and have a basic ranking/matchmaking system. I will probably need something that can interact with a server and a database (the game is turn-based and has no RNG, so cheating would be easy to detect even if most computation is done client-side and minimal data is sent to the server). Ideally, I would be able to release an early version of the game and have people give feedback as I develop additional features (similar to Minecraft). I'd prefer to have a way to release periodic updates to the game instead of releasing an absolute final product. To reach the widest possible audience, I'd prefer technology that allows me to release on PC, Android, iOS, and (maybe) Mac. This is a game with simple mouse inputs which can fit on a mobile touch screen. The game should be monetizable. If I find success with this game, then I may consider becoming a full-time indie game developer. I have several other game ideas and have learned quite a bit from my first attempt at game development. My first thought was an F2P/microtransaction model, but I'm open to other suggestions. Language isn't a primary concern of mine, since I have a decent amount of experience using several languages to program large projects. I'm willing to spend money (e.g. on a developer's license), but the more expensive it gets, the more hesitant I am to use it. I've looked into the following solutions... there are a LOT of tools out there... if anyone has experience with any of these and would like to recommend/reject any of them, it would be helpful. C#/.NET (XNA/MonoGame/SDL/SlimDX/Xamarin/ExEn/ANX?) HTML5/JS (AppMobi/PhoneGap/Marmalade/FlashCanvas/Cordova/libRocket?) Python (Pyglet/Pygame/Kivy?) Java (JavaFX/libGDX?) Unity/Construct 2/Cocos2D/NME/Corona/other game creation software? I'd like something that can do 2D and isn't limited by being too high-level. Other languages (Lua/LOVE? Moai?) Thanks for answering this rather long and tedious question...

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  • Does *every* project benefit from written specifications?

    - by nikie
    I know this is holy war territory, so please read the question to the end before answering. There are many cases where written specifications make a lot of sense. For example, if you're a contractor and you want to get paid, you need written specs. If you're working in a team with 20 persons, you need written specs. If you're writing a programming language compiler or interpreter (and it's not perl), you'll usually write a formal specification. I don't doubt that there are many more cases where written specifications are a really good idea. I just think that there are cases where there's so little benefit in written specs, that it doesn't outweigh the costs of writing and maintaining them. EDIT: The close votes say that "it is difficult to say what is asked here", so let me clarify: The usefulness of written, detailed specifications is often claimed like a dogma. (If you want examples, look at the comments.) But I don't see the use of them for the kind of development I'm doing. So what is asked here is: How would written specifications help me? Background information: I work for a small company that's developing vertical market software. If our product is easier to use and has better performance than the competition, it sells. If it's harder to use, even if it behaves 100% as the specification says, it doesn't sell. So there are no "external forces" for having written specs. The advantage would have to be somewhere in the development process. Now, I can see how frozen specifications would make a developer's life easier. But we'll never have frozen specs. If we see in the middle of development that feature X is not intuitive to use the way it's specified, then we can only choose between changing the specification or developing a product that won't sell. You'll probably ask by now: How do you know when you're done? Well, we're continually improving our product. The competition does the same. So (hopefully) we're never done. We keep improving the software, and when we reach a point when the benefits of the improvements we've added since the last release outweigh the costs of an update, we create a new release that is then tested, localized, documented and deployed. This also means that there's rarely any schedule pressure. Nobody has to do overtime to make a deadline. If the feature isn't done by the time we want to release the next version, it'll simply go into the next version. The next question might be: How do your developers know what they're supposed to implement? The answer is: They have a lot of domain knowledge. They know the customers business well enough, so a high-level description of the feature (or even just the problem that the customer needs solved) is enough to implement it. If it's not clear, the developer creates a few fake screens to get feedback from marketing/management or customers, but this is nowhere near the level of detail of actual specifications. This might be inefficient for larger teams, but for a small team with low turnover it works quite well. It has the additional benefit that the developer in question often comes up with a better solution than the person writing the specs might have. This question is already getting very long, but let me address one last point: Testing. Like I said in the beginning, if our software behaves 100% like the spec says, it still can be crap. In fact, if it's so unintuitive that you need a spec to know how to test it, it probably is crap. It makes sense to have fixed, written tests for some core functionality and for regression bugs, but again, this is nowhere near a full written spec of how the software should behave when. The main test is: hand the software to a user who doesn't know it yet and tell him to use the new feature X. If she can figure out how to use it and it works, it works.

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  • MySQL Connector/Net 6.6.2 has been released

    - by fernando
    MySQL Connector/Net 6.6.2, a new version of the all-managed .NET driver for MySQL has been released.  This is the first of two beta releases intended to introduce users to the new features in the release.  This release is feature complete it should be stable enough for users to understand the new features and how we expect them to work.  As is the case with all non-GA releases, it should not be used in any production environment.  It is appropriate for use with MySQL server versions 5.0-5.6 It is now available in source and binary form from http://dev.mysql.com/downloads/connector/net/#downloads and mirror sites (note that not all mirror sites may be up to date at this point-if you can't find this version on some mirror, please try again later or choose another download site.) The 6.6 version of MySQL Connector/Net brings the following new features:   * Stored routine debugging   * Entity Framework 4.3 Code First support   * Pluggable authentication (now third parties can plug new authentications mechanisms into the driver).   * Full Visual Studio 2012 support: everything from Server Explorer to Intellisense & the Stored Routine debugger. Stored Procedure Debugging ------------------------------------------- We are very excited to introduce stored procedure debugging into our Visual Studio integration.  It works in a very intuitive manner by simply clicking 'Debug Routine' from Server Explorer. You can debug stored routines, functions & triggers. Some of the new features in this release include:   * Besides normal breakpoints, you can define conditional & pass count breakpoints.   * Now the debugger editor shows colorizing.   * Now you can change the values of locals in a function scope (previously caused deadlock due to functions executing within their own transaction).   * Now you can also debug triggers for 'replace' sql statements.   * In general anything related to locals, watches, breakpoints, stepping & call stack should work in a similar way to the C#'s Visual Studio debugger. Some limitations remains, due to the current debugger architecture:   * Some MySQL functions cannot be debugged currently (get_lock, release_lock, begin, commit, rollback, set transaction level)..   * Only one debug session may be active on a given server. The Debugger is feature complete at this point. We look forward to your feedback. Documentation ------------------------------------- The documentation is still being developed and will be readily available soon (before Beta 2).  You can view current Connector/Net documentation at http://dev.mysql.com/doc/refman/5.5/en/connector-net.html You can find our team blog at http://blogs.oracle.com/MySQLOnWindows. You can also post questions on our forums at http://forums.mysql.com/. Enjoy and thanks for the support! 

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  • Having trouble redirecting frevvo using mod_proxy

    - by user38859
    This question is similar to this: http://serverfault.com/questions/102868/how-to-access-webservers-running-on-ports-blocked-on-companys-network Basically, I'm using confluence and a plugin called frevvo. Confluence sits on port 8080 while frevvo sits on port 8082. I want to redirect both of them to port 80 via Apache HTTP web server so that it doesn't get blocked by company proxies. I've been using the document on Atlassian that shows me how to run confluence behind Apache (I can't post a second URL due to being a newbie here) I've successfully redirected Confluence from port 8080 to port 80 so I can now access Confluence using www.example.com/confluence. Now I tried doing the same thing to frevvo with the following configurations: Apache httpd: ProxyRequests Off ProxyPreserveHost On <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPass /confluence http://localhost:8080/confluence ProxyPassReverse /confluence http://localhost:8080/confluence <Location /confluence> Order allow,deny Allow from all </Location> ProxyPass /frevvo http://localhost:8082/ ProxyPassReverse /frevvo http://localhost:8082/ <Location /forms> Order allow,deny Allow from all </Location> And in server.xml for the frevvo Tomcat instance, I added the following within <Host> tag: <Context path=" " docBase="" debug="0" reloadable="false"> <!-- Logger is deprecated in Tomcat 5.5. Logging configuration for Confluence is specified in confluence/WEB-INF/classes/log4j.properties --> <Manager pathname="" /> </Context> The plugin, frevvo, when accessed through the browser using http://localhost:8082 usually redirect to http://localhost:8082/frevvo/web With the above configuration, when accessing www.example.com.au/frevvo redirects to www.example.com/frevvo/web/static/login - which doesn't work. I hope the above details is clear and appreciate anyone who could give us some insight.

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  • Incoming traceroute blocked by ufw

    - by Tobias Timpe
    One of my Proxmox VMs running Ubuntu 13.04 won't accept incoming trace routes while ufw is enabled. What command do give ufw to allow incoming traceroute(6)s? The following shows up in the syslog with ufw enabled: 50:15:15:aa:ae:8d:7d:e4:7a:97:08:00 SRC=79.236.233.97 DST=78.46.101.252 LEN=52 TOS=0x00 PREC=0x00 TTL=1 ID=33400 PROTO=UDP SPT=63757 DPT=33466 LEN=32 Nov 4 16:20:36 web kernel: [8078158.260409] [UFW BLOCK] IN=eth0 OUT= MAC=00:50:56:15:15:aa:ae:8d:7d:e4:7a:97:08:00 SRC=79.236.233.97 DST=78.46.101.252 LEN=52 TOS=0x00 PREC=0x00 TTL=1 ID=33401 PROTO=UDP SPT=63757 DPT=33467 LEN=32 Nov 4 16:20:41 web kernel: [8078163.262626] [UFW BLOCK] IN=eth0 OUT= MAC=00:50:56:15:15:aa:ae:8d:7d:e4:7a:97:08:00 SRC=79.236.233.97 DST=78.46.101.252 LEN=52 TOS=0x00 PREC=0x00 TTL=2 ID=33402 PROTO=UDP SPT=63757 DPT=33468 LEN=32 Nov 4 16:20:46 web kernel: [8078168.262927] [UFW BLOCK] IN=eth0 OUT= MAC=00:50:56:15:15:aa:ae:8d:7d:e4:7a:97:08:00 SRC=79.236.233.97 DST=78.46.101.252 LEN=52 TOS=0x00 PREC=0x00 TTL=2 ID=33403 PROTO=UDP SPT=63757 DPT=33469 LEN=32 Nov 4 16:20:51 web kernel: [8078173.260521] [UFW BLOCK] IN=eth0 OUT= MAC=00:50:56:15:15:aa:ae:8d:7d:e4:7a:97:08:00 SRC=79.236.233.97 DST=78.46.101.252 LEN=52 TOS=0x00 PREC=0x00 TTL=2 ID=33404 PROTO=UDP SPT=63757 DPT=33470 LEN=32 And the trace route just ends in starts after the Proxmox host machine. Thanks Tobias Timpe

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  • IIS 6.0 Application pool crash

    - by David
    One application pool on one of our webservers crashed and we found this in the Eventlog, where can we find more information about it? Event Type: Error Event Source: W3SVC Event Category: None Event ID: 1101 Date: 11/23/2009 Time: 10:57:55 AM User: N/A Computer: ID-WEB Description: The World Wide Web Publishing Service failed to create app pool 'Global'. The data field contains the error number. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: b7 00 07 80 ·..? Attempting to manually start the application pool gives the following in the event log: Event Type: Error Event Source: W3SVC Event Category: None Event ID: 1107 Date: 11/23/2009 Time: 3:53:13 PM User: N/A Computer: ID-WEB Description: The World Wide Web Publishing Service failed to modify app pool 'Global'. The data field contains the error number. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 05 40 00 80 .@.? We are running IIS 6.0 on a Windows server 2003 R2, 32bits.

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  • Ant task to pre-compile JSPs on weblogic server

    - by user24560
    I am trying to create an ant task to compile JSPs. Here are the excerpts from the build.xml related to the task: .... <fileset dir="${java.home}/lib"> <include name="tools.jar"/> </fileset> <java classname="weblogic.jspc" fork="yes"> <classpath refid="weblogic.jsp.classpath" /> <sysproperty key="weblogic.jsp.windows.caseSensitive" value="false"/> <arg line="-forceGeneration -keepgenerated -compileAll -webapp ${jsp.src.dir} -d ${jsp.generated.src.dir}"/> </java> When I try to run wl.jsp.generate task, I get: wl.jsp.generate: [java] [jspc] warning: expected file /WEB-INF/web.xml not found, tag libraries cannot be resolved. [java] [jspc] Overriding default descriptor option 'keepgenerated' with value specified on command-line 'true' [java] Exception encountered while compiling C:\workspace\smcmw\smcmw_browser\jsp\smcesearchprogress.jsp [java] java.lang.NoSuchMethodError: javax.servlet.jsp.tagext.TagAttributeInfo.(Ljava/lang/String;ZLjava/lang/String;ZZLjava/lang/String;ZZLjava/lang/String;Ljava/lang/String;)V [java] at weblogic.jsp.internal.jsp.tag.TagAttrInfoEx.<init>(TagAttrInfoEx.java:64) [java] at weblogic.jsp.internal.jsp.tag.TagAttrInfoEx.<init>(TagAttrInfoEx.java:57) [java] at weblogic.jsp.internal.jsp.tag.TagAttrInfoEx.<init>(TagAttrInfoEx.java:41) [java] at weblogic.jsp.internal.jsp.tag.TagAttrInfoEx.read(TagAttrInfoEx.java:86) Looks like it fails because it can't find WEB-INF/web.xml file and tag libraries. How can I fix this?

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  • Oracle® Database Express Edition roblem running on Win Server 2003 with MS SQl Server 2008 [closed]

    - by totoz
    Hi I have on Win Server 2003 MS SQL Server 2008 and also IIS is running. I try learn Oracle, so first I installed Oracle® Database Express Edition. I tried connect viac web browser on Oracle Server on url http://127.0.0.1:8080/apex I got this expcetion in browser The page cannot be found The page you are looking for might have been removed, had its name changed, or is temporarily unavailable. Please try the following: Make sure that the Web site address displayed in the address bar of your browser is spelled and formatted correctly. If you reached this page by clicking a link, contact the Web site administrator to alert them that the link is incorrectly formatted. Click the Back button to try another link. HTTP Error 404 - File or directory not found. Internet Information Services (IIS) Technical Information (for support personnel) Go to Microsoft Product Support Services and perform a title search for the words HTTP and 404. Open IIS Help, which is accessible in IIS Manager (inetmgr), and search for topics titled Web Site Setup, Common Administrative Tasks, and About Custom Error Messages. Why I can not log on Oracle Home Page?

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  • Getting 401 when using client certificate with IIS 7.5

    - by Jacob
    I'm trying to configure a web site hosted under IIS 7.5 so that requests to a specific location require client certificate authentication. With my current setup, I still get a "401 - Unauthorized: Access is denied due to invalid credentials" when accessing the location with my client cert. Here's the web.config fragment that sets things up: <location path="MyWebService.asmx"> <system.webServer> <security> <access sslFlags="Ssl, SslNegotiateCert"/> <authentication> <windowsAuthentication enabled="false"/> <anonymousAuthentication enabled="false"/> <digestAuthentication enabled="false"/> <basicAuthentication enabled="false"/> <iisClientCertificateMappingAuthentication enabled="true" oneToOneCertificateMappingsEnabled="true"> <oneToOneMappings> <add enabled="true" certificate="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"/> </oneToOneMappings> </iisClientCertificateMappingAuthentication> </authentication> </security> </system.webServer> </location> The client certificate I'm using in my web browser matches what I've placed in the web.config. What am I doing wrong here?

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  • Kerberos & signle-sign-on for website

    - by Dylan Klomparens
    I have a website running on a Linux computer using Apache. I've employed mod_auth_kerb for single-sign-on Kerberos authentication against a Windows Active Directory server. In order for Kerberos to work correctly, I've created a service account in Active Directory called dummy. I've generated a keytab for the Linux web server using ktpass.exe on the Windows AD server using this command: ktpass /out C:\krb5.keytab /princ HTTP/[email protected] /mapuser [email protected] /crypto RC4-HMAC-NT /ptype KRB5_NT_PRINCIPAL /pass xxxxxxxxx I can successfully get a ticket from the Linux web server using this command: kinit -k -t /path/to/keytab HTTP/[email protected] ... and view the ticket with klist. I have also configured my web server with these Kerberos properties: <Directory /> AuthType Kerberos AuthName "Example.com Kerberos domain" KrbMethodK5Passwd Off KrbAuthRealms EXAMPLE.COM KrbServiceName HTTP/[email protected] Krb5KeyTab /path/to/keytab Require valid-user SSLRequireSSL <Files wsgi.py> Order deny,allow Allow from all </Files> </Directory> However, when I attempt to log in to the website (from another Desktop with username 'Jeff') my Kerberos credentials are not automatically accepted by the web server. It should grant me access immediately after that, but it does not. The only information I get from the mod_auth_kerb logs is: kerb_authenticate_user entered with user (NULL) and auth_type Kerberos However, more information is revealed when I change the mod_auth_kerb setting KrbMethodK5Passwd to On: [Fri Oct 18 17:26:44 2013] [debug] src/mod_auth_kerb.c(1939): [client xxx.xxx.xxx.xxx] kerb_authenticate_user entered with user (NULL) and auth_type Kerberos [Fri Oct 18 17:26:44 2013] [debug] src/mod_auth_kerb.c(1031): [client xxx.xxx.xxx.xxx] Using HTTP/[email protected] as server principal for password verification [Fri Oct 18 17:26:44 2013] [debug] src/mod_auth_kerb.c(735): [client xxx.xxx.xxx.xxx] Trying to get TGT for user [email protected] [Fri Oct 18 17:26:44 2013] [debug] src/mod_auth_kerb.c(645): [client xxx.xxx.xxx.xxx] Trying to verify authenticity of KDC using principal HTTP/[email protected] [Fri Oct 18 17:26:44 2013] [debug] src/mod_auth_kerb.c(1110): [client xxx.xxx.xxx.xxx] kerb_authenticate_user_krb5pwd ret=0 [email protected] authtype=Basic What am I missing? I've studied a lot of online tutorials and cannot find a reason why the Kerberos credentials are not allowing access.

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  • Internal but no external Citrix Access?

    - by leeand00
    We recently had to reload our configuration of Citrix on our server Server1, and since we have, we can access Citrix internally, but not externally. Normally we access Citrix from http://remote.xyz.org/Citrix/XenApp but since the configuration was reloaded we are met with a Service Unavailable message. Internally accessing the Citrix web application from http://localhost/Citrix/XenApp/ on Server1 we are able to access the web application. And also from machines on our local network using http://Server1/Citrix/XenApp/. I have gone into the Citrix Access Management Console and from the tree pane on the left clicked on Citrix Access Management Console->Citrix Resources->Configuration Tools->Web Interface->http://remote.xyz.org/Citrix/PNAgent Citrix Access Management Console->Citrix Resources->Configuration Tools->Web Interface->http://remote.xyz.org/Citrix/XenApp, which in both cases displays a screen that reads Secure client access. Here it offers me several options: Direct, Alternate, Translated, Gateway Direct, Gateway Alternate, Gateway Translated. I know that I can change the method of use by clicking Manage secure client access->Edit secure client access settings which opens a window that reads "Specify Access Methods", and below that reads "Specify details of the DMZ settings, including IP address, mask, and associated access method", I don't know what the original settings were, and I also don't know how our DMZ is configured so that I can specify the correct settings, to give access to our external users on the http://remote.xyz.org/Citrix/XenApp site. We have a vendor who setup our DMZ and does not allow us access to the gateway to see these settings. What sorts of questions should I ask them to restore remote access?

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  • Routing Apache TracEnv

    - by fampinheiro
    Hello, i have a situation with many trac instances. They all have the same structure in the filesystem. PATH/trac1 PATH/trac2 PATH/trac3 i have this configuration <Location /trac/trac1> SetHandler mod_python PythonInterpreter main_interpreter PythonHandler trac.web.modpython_frontend PythonOption TracEnv PATH/trac1 PythonOption TracUriRoot /trac/trac1 PythonOption PYTHON_EGG_CACHE PATH/eggs/ </Location> <Location /trac/trac2> SetHandler mod_python PythonInterpreter main_interpreter PythonHandler trac.web.modpython_frontend PythonOption TracEnv PATH/trac2 PythonOption TracUriRoot /trac/trac2 PythonOption PYTHON_EGG_CACHE PATH/eggs/ </Location> <Location /trac/trac3> SetHandler mod_python PythonInterpreter main_interpreter PythonHandler trac.web.modpython_frontend PythonOption TracEnv PATH/trac3 PythonOption TracUriRoot /trac/trac3 PythonOption PYTHON_EGG_CACHE PATH/eggs/ </Location> i wonder if it's possible to do something like (TracEnvParentDir is not an option) <Location /trac/{ENV}> SetHandler mod_python PythonInterpreter main_interpreter PythonHandler trac.web.modpython_frontend PythonOption TracEnv PATH/{ENV} PythonOption TracUriRoot /trac/{ENV} PythonOption PYTHON_EGG_CACHE PATH/eggs/ </Location> Thank you for your time. EDIT: TracEnvParentDir is not an option because my structure is the following +---projs +---trac1 ¦ +---public [instance] ¦ +---t1 ¦ ¦ +---common [instance] ¦ ¦ +---g1 [instance] ¦ ¦ +---g2 [instance] ¦ ¦ +---g3 [instance] ¦ ¦ +---g4 [instance] ¦ ¦ +---g5 [instance] ¦ +---t2 ¦ ¦ +---common [instance] ¦ ¦ +---g1 [instance] ¦ ¦ +---g2 [instance] ¦ ¦ +---g3 [instance] ¦ ¦ +---g4 [instance] ¦ ¦ +---g5 [instance] ¦ +---t3 ¦ +---common [instance] ¦ +---g1 [instance] ¦ +---g2 [instance] ¦ +---g3 [instance] ¦ +---g4 [instance] ¦ +---g5 [instance] ¦ +---trac2 +---public [instance] +---t1 ¦ +---common [instance] ¦ +---g1 [instance] ¦ +---g2 [instance] ¦ +---g3 [instance] ¦ +---g4 [instance] ¦ +---g5 [instance] +---t2 ¦ +---common [instance] ¦ +---g1 [instance] ¦ +---g2 [instance] ¦ +---g3 [instance] ¦ +---g4 [instance] ¦ +---g5 [instance] +---t3 +---common [instance] +---g1 [instance] +---g2 [instance] +---g3 [instance] +---g4 [instance] +---g5 [instance] I use the TracEnvParentDir on t1, t2 and t3 and TracEnv on trac1/public and trac2/public I wonder if it's possible to define a part of the url variable.

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  • localhost won't load after adding config data to httpd

    - by OldWest
    I am not very experienced with configuring httpd, and I am following a tutorial to view my site w/ domain name under localhost. My localhost just blanks out and my apache services won't restart. I checked all of my paths and they are correct. I am editing the w*indows/system32/drivers/etc/host*s file and my apache httpd file. This is what I am putting in my hosts file: 127.0.0.1 www.cars_v1.0.com.localhost And in the footer of my httpd file I am putting this: <VirtualHost 127.0.0.1:80> ServerName www.cars_v1.0.com.localhost DocumentRoot "C:\wamp\www\symfony\cars_v1.0\web" DirectoryIndex index.php <Directory "C:\wamp\www\symfony\cars_v1.0\web"> AllowOverride All Allow from All </Directory> Alias /sf C:\wamp\www\symfony\cars_v1.0\lib\vendor\symfony-1.4.8\data\web\sf <Directory "C:\wamp\www\symfony\cars_v1.0\lib\vendor\symfony-1.4.8\data\web\sf"> AllowOverride All Allow from All </Directory> </VirtualHost>

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  • access an IP restricted service from a dynamic IP (Broadband modem) on a windows machine

    - by Joel Alenchery
    Hi, I dont know if this is the correct place to ask this question but here goes .. (please note that I am pretty much a newbie in terms of networking and I work primarily on the windows platform) I have been working on accessing and consuming some web services in C#/ASP.Net, these web services that I consume are IP restricted. Currently they allow access only from my work network (we have a static ip set up through which all our internet requests are routed). Every now and then we have people who go out and about and are stuck with using a usb dongle based internet connection and hence are not able to now access these web services that they are working on. What I would like to do is to provide some way for these remote workers to access the IP restricted web services using the static ip at our office. For example when the remote worker tries to access a service say http://exampleService.com .. the request gets routed to some box at our office and then out to the actual service. That way the service always sees the static ip of the office and not the dynamic ip that the remote user is actually using. I have done a fair bit of googling and its difficult to search for it as most of the results come back for dynamic DNS which is not really what I am looking for. I have also looked at a couple of posts on here namely Accessing IP restricted server from dynamic IP which does provide some insight but the fellow seems to have access to the source that does the ip restriction and is able to change the restrictions. In my case i dont have that access. another one that looked interesting was Static IP for dynamic IP the first answer seems exactly what I need but I dont know how I would go about doing the same on a windows machine. any help would be really appreciated. (am sorry about being soo noob-ish) PS: Right now everyone is using RDC/LogMeIn to access an internet connected machine in the office to manually check the webservice and getting work done. Which is a very tedious process.

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  • access an IP restricted service from a dynamic IP (Broadband modem) on a windows machine

    - by Joel Alenchery
    Hi, I dont know if this is the correct place to ask this question but here goes .. (please note that I am pretty much a newbie in terms of networking and I work primarily on the windows platform) I have been working on accessing and consuming some web services in C#/ASP.Net, these web services that I consume are IP restricted. Currently they allow access only from my work network (we have a static ip set up through which all our internet requests are routed). Every now and then we have people who go out and about and are stuck with using a usb dongle based internet connection and hence are not able to now access these web services that they are working on. What I would like to do is to provide some way for these remote workers to access the IP restricted web services using the static ip at our office. For example when the remote worker tries to access a service say http://exampleService.com .. the request gets routed to some box at our office and then out to the actual service. That way the service always sees the static ip of the office and not the dynamic ip that the remote user is actually using. I have done a fair bit of googling and its difficult to search for it as most of the results come back for dynamic DNS which is not really what I am looking for. I have also looked at a couple of posts on here namely http://serverfault.com/questions/187231/accessing-ip-restricted-server-from-dynamic-ip which does provide some insight but the fellow seems to have access to the source that does the ip restriction and is able to change the restrictions. In my case i dont have that access. another one that looked interesting was http://serverfault.com/questions/136806/static-ip-for-dynamic-ip the first answer seems exactly what I need but I dont know how I would go about on a windows machine. any help would be really appreciated. (am sorry about being soo noob-ish) PS: Right now everyone is using RDC/LogMeIn to access an internet connected machine in the office to manually check the webservice and getting work done. Which is a very tedious process.

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  • Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host

    - by Paul J. Warner
    I am having an issue with a program where after 6 mins +- 5 secs we get the above exception. Some more info about the exception stacktrace is below. This all happens pretty religiously, 6 mins goes by and bam the following 3 exeptions. We have the application installed in 2 other environments and it is working fine there. I am hoping to find some server settings either IIS 6 or Server 2003 settings that may be causing this issue to occur. I have reviewed some of the similar questions and don't see very many answers. I am hoping that maybe the information I have provided may help a little bit. 208741,Exception,,,,2011-06-21 00:30:14.193,SERVERNAME,2624,1,CLIENTNAME,The underlying connection was closed: An unexpected error occurred on a receive. , at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request) at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request) at Microsoft.Web.Services3.WebServicesClientProtocol.GetResponse(WebRequest request, IAsyncResult result) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security._SslStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.StartReading(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.TlsStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead),2004437127,114,1 208742,Exception,,,,2011-06-21 00:30:14.227,SERVERNAME,2624,1,CLIENTNAME,Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. , at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security._SslStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.StartReading(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.TlsStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead),2004437127,114,1 208743,Exception,,,,2011-06-21 00:30:14.287,SERVERNAME,2624,1,CLIENTNAME,An existing connection was forcibly closed by the remote host , at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size),-691097507,62,1

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  • How to handle server failure in an n-tier architecture?

    - by andy
    Imagine I have an n-tier architecture in an auto-scaled cloud environment with say: a load balancer in a failover pair reverse proxy tier web app tier db tier Each tier needs to connect to the instances in the tier below. What are the standard ways of connecting tiers to make them resilient to failure of nodes in each tier? i.e. how does each tier get the IP addresses of each node in the tier below? For example if all reverse proxies should route traffic to all web app nodes, how could they be set up so that they don't send traffic to dead web app nodes, and so that when new web app nodes are brought online they can send traffic to it? I could run an agent that would update all the configs to all the nodes, but it seems inefficient. I could put an LB pair between each tier, so the tier above only needs to connect to the load balancers, but how do I handle the problem of the LBs dying? This just seems to shunt the problem of tier A needing to know the IPs of all nodes in tier B, to all nodes in tier A needing to know the IPs of all LBs between tiers A and B. For some applications, they can implement retry logic if they contact a node in the tier below that doesn't respond, but is there any way that some middleware could direct traffic to only live nodes in the following tier? If I was hosting on AWS I could use an ELB between tiers, but I want to know how I could achieve the same functionality myself. I've read (briefly) about heartbeat and keepalived - are these relevant here? What are the virtual IPs they talk about and how are they managed? Are there still single points of failure using them?

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  • SharePoint solution package not deploying to all front-ends

    - by Alex
    I have a WSP that contains a web part. It's being built using WSPBuilder. Most of the time, the WSP deploys perfectly. However, in two of our test environments (and sadly, in production, too) the WSP doesn't deploy properly to all the web front ends. The assemblies make it into the GAC, and the .webpart files get provisioned. The problem is that a tool part that the web part relies on for configuration simply fails to appear. I've determined that every time this has happened, it has been isolated to a single web front end. I've been able to resolve the issue by doing an stsadm -o deploysolution to re-deploy the solution, and in one instance it was resolved by the end user deactivating/reactivating the feature. Unfortunately, though, this has made it impossible to determine if the control isn't being deployed properly, or if it's some other issue. Any thoughts on this? Could it be a problem with the WSP, or is it likely to be environmental?

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