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• Unable to login into CentOS

  - by Rendl

  I had setup a multinode cluster using CentOS with VMware yesterday. Today when I reboot the nodes I get the below error on startup. "there is a problem with the configuration server status 256 centOS" (/usr/libexec/gconf-sanity-check-2 ) I am unable to login as root or any user as the screen is frozen. The solutions online is to change the permissions for some tmp files. My problem is I am unable to access the terminal as I cannot login. Also on reboot I do not have any recovery options in CentOS. I only see command line GRUB. I am new to linux and Hadoop.Pls help asap.

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• The SQL Server Setup Portal

  - by BuckWoody

  One of the tasks that takes a long time for the data professional is setting up SQL Server. No, it isn’t that difficult to slide a DVD in a drive and click “Setup” but the overall process of planning the hardware and software environment, making decisions for high-availability, security and dozens of other choices can make the process more difficult. And then, of course, there are the inevitable issues that arise. Microsoft supports literally hundreds and even thousands of combinations of hardware and software drivers from vendors you’ve never even heard of. Making all of that work together is a small miracle, so things are bound to arise that you need to deal with. So, to help you out, we’ve designed a new “SQL Server Setup Portal”. It’s a one-stop-shop for everything you need to know about planning and setting up SQL Server. As time goes on you’ll see even more content added. There are already whitepapers, videos, and multiple places to search on everything from topic names to error codes. So go check it out – and if you have to do a lot of SQL Server Setups – and especially if you don’t – bookmark it as a favorite! Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• An algorithm for finding subset matching criteria?

  - by Macin

  I recently came up with a problem which I would like to share some thoughts about with someone on this forum. This relates to finding a subset. In reality it is more complicated, but I tried to present it here using some simpler concepts. To make things easier, I created this conceptual DB model: Let's assume this is a DB for storing recipes. Recipe can have many instructions steps and many ingredients. Ingredients are stored in a cupboard and we know how much of each ingredient we have. Now, when we create a recipe, we have to define how much of each ingredient we need. When we want to use a recipe, we would just check if required amount is less than available amount for each product and then decide if we can cook a dinner - if amount required for at least one ingredient is less than available amount - recipe cannot be cooked. Simple sql query to get the result. This is straightforward, but I'm wondering, how should I work when the problem is stated the other way round, i.e. how to find recipies which can be cooked only from ingredients that are available? I hope my explanation is clear, but if you need any more clarification, please ask.

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• What is the value of checking in failing unit tests?

  - by Adam W.

  While there are ways of keeping unit tests from being executed, what is the value of checking in failing unit tests? I will use a simple example: Case Sensitivity. The current code is case sensitive. A valid input into the method is "Cat" and it would return an enum of Animal.Cat. However, the desired functionality of the method should not be case sensitive. So if the method described was passed "cat" it could possibly return something like Animal.Null instead of Animal.Cat and the unit test would fail. Though a simple code change would make this work, a more complex issue may take weeks to fix, but identifying the bug with a unit test could be a less complex task. The application currently being analyzed has 4 years of code that "works". However, recent discussions regarding unit tests have found flaws in the code. Some just need explicit implementation documentation (ex. case sensitive or not), or code that does not execute the bug based on how it is currently called. But unit tests can be created executing specific scenarios that will cause the bug to be seen and are valid inputs. What is the value of checking in unit tests that exercise the bug until someone can get around to fixing the code? Should this unit test be flagged with ignore, priority, category etc, to determine whether a build was successful based on tests executed? Eventually the unit test should be created to execute the code once someone fixes it. On one hand it shows that identified bugs have not been fixed. On the other, there could be hundreds of failed unit tests showing up in the logs and weeding through the ones that should fail vs. failures due to a code check-in would be difficult to find.

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• Corrupted file, hard drive test?

  - by all-R

  Hi guys, I'm currently on a macbook with a 1TB external hard drive connected trough a USB hub wich is connected on my macbook. The problem is, my disk, wich is partitioned in 2 (one HFS+ and one NTFS) keeps getting corrupted, recently it was my HFS+ partition, I could not repair it using the Apple's Disk utility, but was able to backup my files. Is it synonym that my hard drive is failing? Is it because of my USB hub? I also keep all my iTunes library on my external HD (HFS+ partition), and did a lot of transfer lately, adding files, removing etc. the last time, my partition got corrupted after a lot of deleted items. If anybody has an idea of what to check first, what could cause the problem, I would appreciate it :) Thanks!

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• More efficient in range checking

  - by Mob

  I am going to use a specific example in my question, but overall it is pretty general. I use java and libgdx. I have a ship that moves through space. In space there is debris that the ship can tractor beam in and and harvest. Debris is stored in a list, and the object contains it own x and y values. So currently there is no way to to find the debris's location without first looking at the debris object. Now at any given time there can be a huge (1000+) amount of debris in space, and I figure that calculating the distance between the ship and every single piece of debris and comparing it to maximum tractor beam length is rather inefficient. I have thought of dividing space into sectors, and have each sector contain a list of every object in it. This way I could only check nearby sectors. However this essentially doubles memory for the list. (I would reference the same object so it wouldn't double overall. I am not CS major, but I doubt this would be hugely significant.) This also means anytime an object moves it has to calculate which sector it is in, again not a huge problem. I also don't know if I can use some sort of 2D MAP that uses x and y values as keys. But since I am using float locations this sounds more trouble than its worth. I am kind of new to programming games, and I imagined there would be some eloquent solution to this issue.

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• Raid system fails to boot after moving from 2.6 kernel to 3.5

  - by user846226

  I'm running Gentoo Linux with a custom compiled kernel and I've just migrated from a 2.6 kernel to a 3.5. As my HD's are on RAID 0 mode I use a custom initrd file in order to be able to boot. While kernel 2.6 is able to boot without problems the new 3.5 compiled kernel fails to boot complaining about no block devices found. After taking a look at initrd.cpio contained scripts I can see the failure message is given by mdadm tool. Does anyone has a clue about that? Edit: this morning i noticed there was some kind of issue on my old initrd which works fine for 2.6 kernels, so created a new initrd which works fine and let me to boot into GNU/Gentoo Linux with same 3.5 bzImage. It could be an issue of mdadm, gonna check it. https://bugs.gentoo.org/show_bug.cgi?id=416081

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• There is a problem with the Office database

  - by RomanT

  After a TimeMachine restore; office 2011 is having kittens over permissions it would seem. Having attempted a 'repair' out of Disk Utility, am still seeing: 'there is a problem with the Office database' upon startup. After which Word/Excel work without issues. Outlook on the other hand won't even start. Given the obvious message here "You do not have write access to the Outlook application folder" - where is the DB located to check?! Ideas ? Thank you

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• Compatible case?

  - by Rick

  Hello everyone, first of all, I'm not sure where this question should go. So I've looked around and found the 'hardware' tag used in superuser.com please forgive me if I'm posting this on the wrong site. I'm new to the hardware part of computers. I've been looking around for a few months and now is the time to make my choice. I want to build my own computer and I think I got all the items I need. I want to know if the case and the motherboard I've chosen are compatible or if you could tell me how to check if they're compatible I want to know if they fit. Here's the motherboard/processor/memory package And this* is the case I'd like to fit it in. I'm sure that all the other stuff I might need I have with me already. Thanks in advance -Rick *See my comment, I may not post two hyperlinks due to spam protection

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• How to sync my PDA (outlook, no wifi) with my Google Calendar?

  - by Peter

  Hey Everybody, We have an old PDA that is not networked (Mio 168). It's main purpose is to serve as an agenda for which we use the outlook that came with it. Now, as my wife usually has the PDA and I want to be able to check and update our agenda too, I'm looking for a way to sync it with Google Calendar by hooking it to my PC via USB. I found a tool to sync outlook with Google Calendar. However, I would need outlook on my PC to be able to use that and I don't have outlook on my PC, nor do I want to buy it just for this sync. So, does anybody here now if and how I can sync my outlook on my PDA with Google Calendar without the go between of a PC version of outlook? Cheers.

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• Why can I not access any file or directory created by PHP from FTP-client?

  - by user43053

  Hello there, If I create a directory with mkdir(), or create a file with fopen(), file_put_contents() or SimpleXMLElement::asXML(), I am unable to access the file with my FTP-client or c-Panel File Manager. If I try to delete or edit them, I get errors. Dreamweaver suggests it is a permission problem or a network or filesystem fault (but I've set the permissions with chmod() to 0777, and when I check the cPanel, it confirms chmod 777. I also tried to use fileowner() and the function returns int(99), the same owner as those files that I could access with my FTP-client. It seems files and directories created with PHP can only be modified or be deleted with PHP. I thought this must be a server setup related issue, so I write it here. I am on a shared server, and I have no idea about setting up servers. Thank you for your time. Kind regards Marius

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• Domain user periodically can't login, but only temporarily?

  - by Josh

  Ok, this is a strange one that I'm having trouble replicating letting alone solving. I have a user who uses two computers (both XP sp3) on the domain with a roaming profile. She has no problems on her personal computer but occasionally needs to use a shared computer. On this shared computer she is sometimes (~once a week) unable to login with the error message "Username or password incorrect. Check username password and domain and try again." I've checked when this happens and her username and password are indeed entered correctly. Now the strange part - if someone else logs in to the computer (which so far always works) and then logs out she is able to log in after that. This problem began after a recent and long overdue password change. I've tried to replicate this problem after a reboot, or after another user logs out to no avail. Any suggestions on troubleshooting or replicating this one? Anyone experienced something similar?

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• Bootable dvd installs ubuntu in one computer but not in other...Why? [closed]

  - by SAM

  Possible Duplicate: My computer boots to a black screen, what options do I have to fix it? I have 2 computers, Windows 7 Intel. On one computer Ubuntu boot-able DVD (AMD 64) works properly. But on other computer the same DVD boots OK but when clicked on "Install Ubuntu" a blank screen with blinking cursor(_) appears and it continues just blinking forever. What problem can be there in computer 2? Can it be DVD reader's problem? (Both computers have LG DVD RW) Can there be any problem in DVD? Computer 1 specs: Pentium D 3 GHz Windows 7 32-bit not a 64bit-capable processor still Ubuntu 64bit trial/installer runs... Computer 2 specs: Core i7 2700k Windows 7 32-bit nvidia gtx 560 graphicsCard ...BIG BOSS... still can't run the setup/trial/disk-check/memory-test ?!?!? Is it the problem of graphics card ?!? I also tried burning other dvd which has the same behavour.... AND yes the dvd name is: ubuntu-12.04.1-dvd-amd64.iso Any help is appreciated.

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• Cannot connect to internet with Clearwire modem.

  - by ide

  I'm currently using a Motorola WiMAX modem (CPEi 25725) and cannot connect to the internet. I can connect to the modem at 192.168.15.1 and check its status. It says that it has good/excellent connectivity to the internet and shows all five signal bars. Additionally it has sent and received some WiMAX packets so I believe it is connected to a tower. I'm at a loss for what the problem is. Unplugging the modem, restarting it from software, and restarting my computer (Windows 7) have not helped. Windows still reports that it is not connected to the internet. Alternatively, could this be an ISP issue? I have heard that Clearwire is a not-so-reputable ISP that blocks VoIP, and I was using Skype recently.

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• What is the best way to make Calculate SHA1 as a context menu option in Mac OS X?

  - by Andrei

  In order to calculate the SHA1 checksum of a downloaded file, I could type /usr/bin/openssl sha1 in Terminal and then drag there the file which I want check. To make it simpler, one could enable a Context Menu item for this action. What is the best way to create such item in Mac OS X 10.6? A detailed answer is appreciated, because I don't have good experience with AppleScript, etc. Step by step Open Automator Create new service Choose to receive selected Files and Folders in Finder Add action Run Shell Script where your bash command is /usr/bin/openssl sha1 "$@" and you pass input as arguments How can I get the output? Preferably in a Growl pop-up or a message window/dialog.

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• Nullable types and ?? operator C# [en-US]

  - by ruimachado

  Nullable types vs Non-nullable types   While developing our C# projects its frequent the null comparison operation to avoid null exceptions. This simple operation is mainly coded using the "var x = null" code example inside an if clause. However not all types of variables are nullable, which means that setting a variable to null is not allowed in every cases, it depends on what kind of type are you defining. But what if there was an extension to your non-nullable type that would convert your variable types to nullable? This extension really exists. As I said before in C# you have nullable types which represent all the values of an underlying type, and an additional null value and can be declared easily using "T?", where T is the type of the variable and for example the normal int type cannot be null, so its a non-nullable type, however if you define a "int?" your variable can be null, what you do is convert a non-nullable type to a nullable type. Example: int x=null;     Not allowed     int? x=null;   Allowed     While using nullable types you can check if a variable is null the same way you do it with nullable types:     But what about setting a default value when a certain variable is null?   In this cases the c# .net framework let you set a default value when you try to assign a nullable type to a non-nullable type, using the ?? operator. If you don't use this operator you can still catch the InvalidOperationException which is throw in this cases. For example  without the ?? operator :     Using the ?? operator your code becomes cleaner and more easy to read and you get a bonus, you can set a default value for multiple variables using the ?? in a chain set.     That’s it,   Thanks, Rui Machado rpmachado.wordpress.com

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• I cannot connect to database from Drupal

  - by Patrick

  hi, I've uploaded my drupal website (and related database) to my new server. The database info is: host: localhost user: user pass: pass databaseName = database_name I've set the following line in settings.php file: $db_url = 'mysqli://user:password@localhost/database_name'; but what I get is this: If you are the maintainer of this site, please check your database settings in the settings.php file and ensure that your hosting provider's database server is running. For more help, see the handbook, or contact your hosting provider. I guess the database is running, it always run and I can access with phpmyadmin so I think the problem is not there. The database and website files upload have also been succesfull.. so I dunno what to do to fix this issue. It is mysql on IIS Server thanks

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• A Virtual Seat at the Architect&rsquo;s Table

  - by Bob Rhubart

  I always have fun producing the Arch2Arch podcasts, but the latest batch was all that and a bag of chips, since I was required to do absolutely no preparation and very little talking, and since the conversation was reminiscent of those I’ve had with various architects (you know who you are) in various watering holes: free-ranging, extemporaneous, and far, far from dull. The three most recent programs were recorded during a virtual mini meet-up of architects back in February.  You’ll find more detail here, but in a nutshell, I invited several previous Arch2Arch panelists to join me on Skype to talk about whatever was on their minds.  The resulting conversation yielded the three latest programs. Check them out – it’s like you’re sitting at the table. Listen to Part 1 Listen to Part 2 Listen to Part 3 The conversation begins with the participant’s responses to my challenge to fill in the blank in the sentence “Most conversations about Enterprise Architecture are too ____.” From there the conversation morphed into a discussion of the sheer joy of finding funding for architecture projects. The architects seated at the virtual table in these programs are:  Todd Biske, a veteran enterprise architect and the author of the book SOA Governace, from Packt Publishing. ( LinkedIn | Twitter | Blog | Oracle Mix ) Jordan Braunstein, an Oracle ACE Director and the Business Integration and Architecture Partner at TUSC. (Blog | Twitter | LinkedIn | Oracle Mix) Basheer Khan,  also an Oracle ACE Director, and the founder and CEO of Innowave Technology (Blog | LinkedIn | Twitter | Oracle Mix) Pat Shepherd, an enterprise architect with the Oracle Enterprise Solutions Group. (Oracle Mix | LinkedIn | Blog) Coming Soon I was so pleased with the results of this meet-up format that I did the same thing for the next series of programs.  These free-ranging conversations feature a different group of participants, covering a different set topics, including the fear of SOA, the misunderstanding and misinformation behind that fear, and the idea of beauty in architecture. Yeah, you read that right. So stay tuned: RSS   Technorati Tags: oracle,otn,enterprise architecture,podcast. arch2arch,meet-up del.icio.us Tags: oracle,otn,enterprise architecture,podcast. arch2arch,meet-up

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• How to merge several detached signatures from different people into one?

  - by Petr Pudlák

  A group of people wants to publish a file and they all want to digitally sign the file as different recipients of the file will have different chains of trust. For simplicity, it's desired that there is only one detached signature file with all the signatures, so that the recipients don't need to check them one by one: foo.tar.gz foo.tar.gz.sig However, for security reasons, every person needs to perform the signing on their computer, it's not possible to create the combined signature by having multiple private keys on one computer and performing the operation with one command. Is it possible with GPG to somehow merge detached signatures of a file from multiple participants?

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• Working with lots of cubes. Improving performance?

  - by Randomman159

  Edit: To sum the question up, I have a voxel based world (Minecraft style (Thanks Communist Duck)) which is suffering from poor performance. I am not positive on the source but would like any possible advice on how to get rid of it. I am working on a project where a world consists of a large quantity of cubes (I would give you a number, but it is user defined worlds). My test one is around (48 x 32 x 48) blocks. Basically these blocks don't do anything in themselves. They just sit there. They start being used when it comes to player interaction. I need to check what cubes the users mouse interacts with (mouse over, clicking, etc.), and for collision detecting as the player moves. Now I had a massive amount of lag at first, looping through every block. I have managed to decrease that lag, by looping through all the blocks, and finding which blocks are within a particular range of the character, and then only looping through those blocks for the collision detection, etc. However, I am still going at a depressing 2fps. Does anyone have any other ideas on how I could decrease this lag? Btw, I am using XNA (C#) and yes, it is 3d.

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• Welcome to the Java Training Beat!

  - by tmcginn

  We are a group of dedicated training developers for Java, located in the US, India, and now Mexico. In this blog we will announce new training content and events that might be of interest to our readers. In this first installment of the Java Training Beat, I would like to introduce three new Oracle By Example (OBE) modules I recently released and posted to the Oracle Online Learning Library. Creating a Simple Java Message Service (JMS) Producer with NetBeans and GlassFish - covers how to create a simple text message producer with NetBeans 7 and GlassFish. Creating Java Message Service (JMS) Resources in WebLogic Server 12c - covers how to create JMS resources using the console and WebLogic Server 12c. With this tutorial, you can replicate the results of the first tutorial in WebLogic. Creating a Publish/Subscribe Model with Message-Driven Beans and GlassFish Server - covers how to create a publish/subscribe application using JMS. This tutorial includes a short case study that includes a JSF front-end application that sends a hotel reservation request object to the server as a MapMessage. Hope you find these useful!  And do check out the Online Learning Library - we have a wide range of additional content posted and more being added every month!

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• migrating storage to a different controller

  - by bellocarico

  Hello, I've just purcheased a couple of adaptec controller (2405/5405) for my ESXi 4.0 U1 servers. Currently ESXi and a couple of VMs are hosted on single sata boot disk connected to a nvidia on board non-RAID controller. I know that it's possible to migrate from single disk to RAID 1 with adaptec and I'm pleased with that, but I'm not sure if ESXi has already the right drivers installed/loaded for this controller. Is there any way I can check this? Is ESXi clever enough to recognize the new hardware and load the right module? Thanks

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• Setting max_allowed_packet for mysql on solaris 10

  - by Drakonen

  I want to set the max_allowed_packet setting for mysql (5.1.31) which is running on Solaris 10. Unfortunately mysql does not seem to read the my.cfg. I tried to place it in /etc/mycfg, /opt/mysql/mysql/data/my.cfg and in /opt/mysql/mysql/support-files/my.cfg. At each of these locations, the max_allowed_packet does not get set when i check with: `select @@max_allowed_packet;` When I start mysqld as such it does set the setting: # su mysql $ mysqld --defaults-file=/etc/my.cfg This are the contents of my.cfg: [mysqld] max_allowed_packet = 50M How can i make mysql read the config when i start it with the SMF tools?

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• Slow Inserts SQL Server 2005

  - by Achilles

  I'm researching an issue with the following information: We had a logging table with about 90k records in it that had inserts taking several seconds(approximately 10 to 20s) in extreme cases. One of the columns of the table stores XML as the XML datatype. The XML isn't being parsed during the insert, just stored. We tried truncating the table assuming that the issue was related the number of records(althought 90k seemed "normal") and the inserts still are performing poorly. While I know there are other issues that can cloud the issue, what would be some "check this first" ideas that could help me debug this issue? Thanks for any suggestions and help in advance.

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• Ubuntu Software Centre is gone! How can I get it back?

  - by Mochan

  Right. I am having MAJOR issues. (It would be much appreciated if you would solve them for me! Check my profile for open questions...) Following an answerer... who sorry to say... didn't give a great answer because it was just a graphical way of doing what I had already done - suggested I purge a library. Turns out that library controlled the Advanced Packaging Tool (apt), Ubuntu Software Centre and the repositories. Not a great tool to mess with. While trying to purge the library, it came up with 'Removing MyUnity.. Removing x... Removing x... Removing Ubuntu Software Centre... Removing X... Removing apt..." I quickly recognized and force shut-down my system. But I guess it was too late. So... well, plainly put - how do I get it back?!

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