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• Amazon EC2 - Unable to connect to MySQL

  - by alexus

  I'm having issue connecting from one VM to another # nmap -p3306 ip-XX-XX-XX-XX.ec2.internal Starting Nmap 6.40 ( http://nmap.org ) at 2014-06-10 17:50 EDT Nmap scan report for ip-XX-XX-XX-XX.ec2.internal (XX.XX.XX.XX) Host is up (0.000033s latency). PORT STATE SERVICE 3306/tcp closed mysql Nmap done: 1 IP address (1 host up) scanned in 1.05 seconds # in my Security Group I allowed Inbound connectivity via port TCP, portrange 3306 and Source 0.0.0.0/0, so theoratically it should work, but in reality it doesn't( I'm running red hat enterprise linux 7 on both VMs. mariadb.service running fine on another VM and I am able to connect to it locally. DB's: # netstat -anp | grep 3306 tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 2324/mysqld # iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination # Any ideas what else I missed?

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• Asterisk failing at startup after upgrading to asterisk18

  - by Supratik

  I was using asterisk16 and asterisk16-skypeforasterisk, which was working fine. I have recently upgraded to asterisk18 and asterisk18-skypeforasterisk, after that I am receiving the following error message. Asterisk ended with exit status 1 Asterisk died with code 1. Asterisk could not start! Use 'tail /var/log/asterisk/full' to find out why. When I checked the log I got the following messages. codec_g729a.c: == Found total of 11 G.729 licenses translate.c: empty buf size, you need to supply one Now, if I remove the /var/lib/asterisk/licenses folder it works fine. Can you please tell me what could be the issue here ? Warm Regards Supratik

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• Designing business objects, and gui actions

  - by fozz

  Developing a product ordering system using Java SE 6. The previous implementations used combo boxes, text fields, and check boxes. Preforming validation on action events from the GUI. The validation includes limiting existing combo boxes items, or even availability. The issue in the old system was that the action was received and all rules were applied to the entire business object. This resulted in a huge event change as options were changed multiple times. To be honest I have no idea how an infinite loop wasn't produced. Through the next iteration I stepped in and attempted to limit the chaos by controlling the order in which the selections could be made. Making configuration of BO's a top down approach. I implemented custom box models, action events, beans/binding, and an MVC pattern. However I still am unable to fully isolate action even chains. I'm thinking that I've approached the whole concept backwards in an attempt to stay closest to what was already in place. So the question becomes what do I design instead? I'm currently considering an implementation of Interfaces, Beans, Property Change Listeners to manage the back and forth. Other thoughts were validation exceptions, dynamic proxies.... I'm sure there are a ton of different ways. To say that one way is right is crazy, and I'm sure it will take a blending of multiple patterns. My knowledge of swing/awt validation is limited, previously I did backend logic only. Other considerations are were some sort of binding(jgoodies or otherwise) to directly bind GUI state to BO's.

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• How to take a CSS animation from a browser, and export a GIF of it?

  - by Truth

  I have the following CSS3 Animation going on: http://dabblet.com/gist/2884702. It's basically a simulation of a mirror rotating on its x-axis. Now, I wish to present that in a PowerPoint presentation. Since PowerPoint doesn't have the webkit engine, I want to extract an animated GIF image of that animation, and embed it into my presentation. The problem? No matter what I've tried, I couldn't make a reasonably smooth animated GIF. I've Googled and found many free software which claim to do the job, tried several, none worked as expected. I've tried IrfanView, same issue (also their site makes me want to vomit). So, is there a solution? Or am I doomed to not be able to display it?

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• Are short abbreviated method/function names that don't use full words bad practice or a matter of style?

  - by Alb

  Is there nowadays any case for brevity over clarity with method names? Tonight I came across the Python method repr() which seems like a bad name for a method to me. It's not an English word. It apparently is an abbreviation of 'representation' and even if you can deduce that, it still doesn't tell you what the method does. A good method name is subjective to a certain degree, but I had assumed that modern best practices agreed that names should be at least full words and descriptive enough to reveal enough about the method that you would easily find one when looking for it. Method names made from words help let your code read like English. repr() seems to have no advantages as a name other than being short and IDE auto-complete makes this a non-issue. An additional reason given in an answer is that python names are brief so that you can do many things on one line. Surely the better way is to just extract the many things to their own function, and repeat until lines are not too long. Are these just a hangover from the unix way of doing things? Commands with names like ls, rm, ps and du (if you could call those names) were hard to find and hard to remember. I know that the everyday usage of commands such as these is different than methods in code so the matter of whether those are bad names is a different matter.

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• Using Ogre with android [closed]

  - by Rich

  I am trying get Ogre 3d to work on android, I have managed to download and run the ogre sample browser but I am really struggling with trying to get a basic application working i have been trying for days now with no avail. Does anyone have any pointers on where to start with this? Thanks if anyone can help EDIT: Very sorry for my rubbish question! I am a bit new to this and I am just trying to seek some guidance. Ok so i followed the instructions on the Ogre wiki to build ogre for android and the sample browser here: http://www.ogre3d.org/tikiwiki/tiki-index.php?page=CMake+Quick+Start+Guide&tikiversion=Android so it is deffinately possible. The issue I am having is knowing what I need to do to get started with ogre e.g just a simple hello world style app where it might just show the ogre head, so tutorials might actually be good because I could not really find any simple ones as I am very new to 3D development. I just found that the sample browser was just massive and yes it has everything in it but it's very difficult to understand how it all works. What I am asking is basically some help, as I have been trying to pull out some parts of the sample browser to just create a view with a 3D model. Hope this is better?

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• Generic rule parser for RPG board game rules - how to do it?

  - by burzum

  I want to build a generic rule parser for pen and paper style RPG systems. A rule can involve usually 1 to N entities 1 to N roles of a dice and calculating values based on multiple attributes of an entity. For example: Player has STR 18, his currently equipped weapon gives him a bonus of +1 STR but a malus of DEX -1. He attacks a monster entity and the game logic now is required to run a set of rules or actions: Player rolls the dice, if he gets for example 8 or more (base attack value he needs to pass is one of his base attributes!) his attack is successfully. The monster then rolls the dice to calculate if the attack goes through it's armor. If yes the damage is taken if not the attack was blocked. Besides simple math rules can also have constraints like applying only to a certain class of user (warrior vs wizzard for example) or any other attribute. So this is not just limited to mathematical operations. If you're familiar with RPG systems like Dungeon and Dragons you'll know what I'm up to. My issue is now that I have no clue how to exactly build this the best possible way. I want people to be able to set up any kind of rule and later simply do an action like selecting a player and a monster and run an action (set of rules like an attack). I'm asking less for help with the database side of things but more about how to come up with a structure and a parser for it to keep my rules flexible. The language of choice for this is php by the way.

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• How do I purge or empty Windows Explorer's network username and sharename cache?

  - by Abel

  While troubleshooting a Samba vs Windows Network issue, I noticed that Windows' Explorer remembers login credentials of remote shares, even if you ask it not to. For instance, after accessing a share using \\servername\sharename plus entering username/password and then closing Windows Explorer, adding the same share as a network drive gives the following message, regardless whether the username is the same or not: The network folder specified is currently mapped using a different user name and password. To connect using a different user name and password, first disconnect any existing mappings to this network share. Using NET USE does not show the share. After restarting the computer, I have no problems accessing the share using different credentials. But restarting just for testing other credentials is annoying, esp. while troubleshooting. How can I purge this cache, using Windows Vista? Note: using nbtstat -R[R], ipconfig /renew, killing explorer.exe or disabling / re-enabling the network card didn't help.

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• WSS "Cannot connect to the configuration database"

  - by Tim

  I have 64-bit WSS 3.0 installed on a 64-bit Windows 2003 Server. After installing WSS 3.0 I switched IIS to run in 32-bit emulation mode as we have some applications that require this. I'm getting a "Cannot connect to the configuration database" trying to get to the Central Admin page and wondered if: a. The setup I have won't work and I'm wasting my time trying to figure this out. or b. If anyone has any suggestions for resolving the database connection issue? The identity of the app pool that WSS runs under has all the required permissions in SQL so far as I can tell. Any help would be appreciated!

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• Laptop Locking Up

  - by David

  I am having a very weird issue on a Lenovo W510 laptop. It will lock up randomly. I have had it lock up during post, during the boot-up of Linux, during login, and after the login. The following are tests that I have performed on the laptop. I ran memtest I took out the extra memory module. I swapped the HDD with another HDD that had Windows 7 on it. (It BSOD'd, and before anyone could possibly read the error line, it restarts.) I tried taking the battery out and booting with only the Power cord. The only other options I can think of the problem being are the motherboard or the PSU. If anyone has any advice, I appreciate it. If not, the HP guy will be here in a few days to fix it. I would just love to call them up and tell them that the service is no longer needed.

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• Bash & 'su' script giving an error "standard in must be a tty".

  - by sHz

  Folks, I'm having an issue with a bash script which runs a particular command as a different user. The background: Running on a Linux box (CentOS), the script is quite simple, its starting the hudson-ci application. declare -r HOME=/home/hudson declare -r RUNAS=hudson declare -r HOME=/home/hudson declare -r LOG=hudson.log declare -r PID=hudson.pid declare -r BINARY=hudson.war su - ${RUNAS} -c "nohup java -jar ${HOME}/${BINARY} >> ${HOME}/${LOG} 2>&1; echo $! > ${HOME}/${PID}" & This is the bridged version of the script, when run, the script exists with "standard in must be a tty". Any ideas on what I could be doing wrong? I've tried Dr Google and all the advise hasn't helped thus far.

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• Attributes of an Ethical Programmer?

  - by ahmed

  Software that we write has ramifications in the real world. If not, it wouldn't be very useful. Thus, it has the potential to sweep across the world faster than a deadly manmade virus or to affect society every bit as much as genetic manipulation. Maybe we can't see how right now, but in the future our code will have ever-greater potential for harm or good. Of course, there's the issue of hacking. That's clearly a crime. Or is it that clear? Isn't hacking acceptable for our government in the event of national security? What about for other governments? Cases of life-and-death emergency? Tracking down deadbeat parents? Screening the genetic profile of job candidates? Where is the line drawn? Who decides? Do programmers have responsibility for how their code is used? What if a programmer writes code to pry into confidential information or copy-protected material? Does he bear responsibility along with the person who used the program? What about a programmer who knowingly or unknowingly writes code to "fix the books?" Should he be liable?

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• Finding a private (NAT) host's IP using historic destination data

  - by l0c0b0x

  The issue: An unknown private (NAT) client is infected with malware and it's trying to access a Bot server at random times/dates. How we know about this: We receive bot traffic notices/alerts from REN-ISAC. Unfortunately, we don't receive those until the next day after it has happened. What they provide to us is: The source address (of the firewall) The destination addresses (it varies, but they're going to network subnet allocated to a German ISP) The source port (which varies--dynamic ports). Question: What would be the best approach to finding this internal host (historically) with a Cisco ASA as firewall? I'm guessing blocking anything to the destination address(es), and logging that type of traffic/access might allow me to find the source host, but I'm not sure which tool/command would be the most useful. I've seen Netflow thrown into a few responses when it comes to logging, but I'm confused with it's association of Logging, NAL, and nBAR, and how they relate to Netflow.

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• Deleting Time Machine in Mac OS X 10.6.4

  - by cappuccino

  Does anyone know how to delete Time Machine in Mac OS X 10.6.4? Before answering: sudo rm -rf /whateverthetimemachineis does not work Disabling the ACL permissions first with sudo fsaclctl -p /whatever -d does not work, sudo: fsaclctl: command not found Use the delete all backup feature in Time Machine... this is slow as hell, would take days. Need a command line solution. No I don't want to reformat the drive, I have other content on it, and no don't say I should have separated on two partition or two drives, I did it this say since partitions cannot be dynamically changed, and two drives is annoying since, whats the point of having a big drive?... plus has no relation to the issue at hand. Already googlied for hours and read everything on Super User, nothing working. and all solutions are the first 4. Any clues?

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• Leaving the field of programming. What are the options?

  - by hal10001

  A lot of graduates ask about getting into this field, but I know there are times when I (as well as many others) think about leaving, too. My issue is that I love solving problems and the act of creating something that people enjoy using, and that is what keeps bringing me back. Lately, though, programming has become less of the act of creation and about solving problems, and has become more about being "a monkey at a keyboard". Can you offer any advice with regard to: What fields would offer equivalent problem-solving challenges consistently? How you would go about doing the research, or considering the career change? Basically anything else you think would be helpful in this situation. EDIT: I guess I should clarify and say that I've been in the field about 10 years, and I have had my fair share of working environments. The place where I am at now, and even the previous two jobs, the people I worked with have been great. I've been very lucky in that respect. I'm beginning to wonder if the next step for me has little to do with actual programming and more to do with business analysis or strategic consulting. I would hate to get too much onto the business side of things though, as I like being around tech folks more.

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• How much does the geographical location of DNS servers matter?

  - by GreatFire

  We have started to run our own DNS servers located in Asia since that's where our main audience is. However, it seems that some users in the US are having difficulties accessing our website sometimes. I've noticed myself that DNS lookups of our domain from the US are relatively slow (500 msec+). Maybe the problems some users are having are due to other DNS configuration errors, but in general, how much of an issue is the geographical location of DNS servers? Should we have an additional server in the US?

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• Why doesn't SuperGenPass work on some sites when I use Chrome?

  - by Lunatik

  Bookmarklet SuperGenPass sometime fails to popup when I click the bookmark in Chrome. It does however work when on the same page works in Firefox; an example is http://www.engadget.com/login This behaviour also replicated on a new Chrome tab (understandably, there is no domain), but some sites just fail to launch it meaning you have to go to another site, open it up, enter in [something] to get the 'Regenerate password' link, enter the domain manually then finally enter your master password to get the generated password! Something about the makeup of the page seems to make SuperGenPass think that it isn't able/required to popup. The FAQ doesn't make any mention of this fact, neither does a quick Google turn up anything that looks relevant. Does anyone else have the same issue? How can it be fixed? I'm on Windows using the current release of Chrome (5.x at the moment, but probably 18.x by the time you read this next week based on Google's seemingly logarithmic release numbering).

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• How to turn off power metering in HP ILO2?

  - by Baron Throw

  I have an issue with all of my RHEL 5.3 servers, where HP iLo2 power meter checks the power draw of the power supply on the server. However this gets passed to the /var/log/messages in our host, and eventually fills up the logs. Anyone have any idea how to completely disable power meter option in iLo? I checked google and iLo2 documentation provided from HP, but found nothing that tells you how to disable it / turn it off. Maybe some CLI command? Im not sure. The message is: Aug 18 10:11:03 KAMIL-SERVER1 ipstor_hwmond: IPSTOR||1408371063||E||11788||sensors||Power Meter = 108.000 Watts [ low=na high=na]

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• unable to send mail from postfix on Ubuntu 12.04

  - by gilmad

  I'm trying to send an email through Google from my localhost. (via PHP5.3) But Google keeps on blocking my requests. I tried to follow the solutions given to a few similar questions, but for some reason they do not work. I followed these instructions to configure it - http://www.dnsexit.com/support/mailrelay/postfix.html Now for the config data: my main.cf file looks like that: relayhost = [smtp.gmail.com]:587 smtp_fallback_relay = [relay.google.com] smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = my sasl_passwd looks like that: [smtp.gmail.com]:587 [email protected]:password and that is how the mail.log rows look like: Dec 14 10:24:50 COMP-NAME postfix/pickup[5185]: 1C3987E0EDD: uid=33 from= Dec 14 10:24:50 COMP-NAME postfix/cleanup[5499]: 1C3987E0EDD: message-id=<[email protected] Dec 14 10:24:50 COMP-NAME postfix/qmgr[5186]: 1C3987E0EDD: from=, size=483, nrcpt=1 (queue active) Dec 14 10:24:50 COMP-NAME postfix/smtp[5501]: 1C3987E0EDD: to=, relay=smtp.gmail.com[173.194.70.109]:587, delay=0.61, delays=0.19/0/0.32/0.1, dsn=5.7.0, status=bounced (host smtp.gmail.com[173.194.70.109] said: 530 5.7.0 Must issue a STARTTLS command first. w3sm8024250eel.17 (in reply to MAIL FROM command)) Dec 14 10:24:50 COMP-NAME postfix/cleanup[5499]: C20677E0EDE: message-id=<[email protected] Dec 14 10:24:50 COMP-NAME postfix/bounce[5502]: 1C3987E0EDD: sender non-delivery notification: C20677E0EDE Dec 14 10:24:50 COMP-NAME postfix/qmgr[5186]: C20677E0EDE: from=<, size=2532, nrcpt=1 (queue active) Dec 14 10:24:50 COMP-NAME postfix/qmgr[5186]: 1C3987E0EDD: removed

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• Java Magazine: Growing on Open

  - by Tori Wieldt

  The November/December issue of Java Magazine is now out, with several great Java stories, including: Growing on Open AgroSense provides an all-Java open source platform for sustainable farming and precision agriculture. An Engine for Big Data Hadoop uses Java for large-scale analytics. JavaFX in SpringStephen Chin shows you why to use the Spring framework on the client. JCP Executive Q&A: Mike MilinkovichThe Eclipse Foundation’s executive director assesses the state of Java and the JCP. Exploring Lambda Expressions for the Java Language and the JVMBen Evans, Martijn Verburg, and Trisha Gee help you get ready for lambda expressions in Java SE 8. Get Started with Java SE for Embedded Devices on Raspberry PiWe walk you through getting Linux and Java SE for Embedded Devices to run on the Raspberry Pi in less than an hour. Java NationGet the news from JavaOne 2012 in San Francisco. Java Magazine is a bi-monthly online publication. It includes technical articles on the Java language and platform; Java innovations and innovators; JUG and JCP news; Java events; links to online Java communities; and videos and multimedia demos. Subscriptions are free. Do you have feedback about Java Magazine? Send a tweet to @oraclejavamag.

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• The Lease Standard Train is Back on Track

  - by Theresa Hickman

  As I was walking to the elevator, I ran into Seamus Moran, our resident accounting expert. Me: “Hi Seamus, where have you been? You don’t write, you don’t call, and you don’t send me flowers. I’ve been hearing more and more about the Lease Accounting topic. It looks like Congress is weighing in on it too and putting heat on FASB. According to a recent article in Reuters  “representatives Brad Sherman, a Democrat, and Republican John Campbell, have written to the U.S. Financial Accounting Standards Board warning of dire economic fallout from a plan to have companies put leases on their balance sheets." Here’s what Seamus had to say: Yes, but there have been some recent developments. The FASB and IASB cleared a logjam, resolved a final “content of the standard” issue, and articulated a way to move forward on Leases last Wednesday.  It looks like the Lease Standard Train is back on track.   We’ve just had a briefing from PwC. The Lease timeline now looks like this: Now to June 2012: The staff will write up the decisions June 2012: Boards will meet on “logistical” issues (glossed over) Oct, Nov, most likely December 2012: A New Lease Exposure Draft will be crafted January – April 2013: Public Comment period begins April to September 2013: Everyone to digest the comments and draft the final standard End of 2013 (Probably more like Early 2014): Publish the new Lease Accounting Standards 2015: Retroactive reporting 2017: New standard is effective It seems that leases under one year will be treated as “rent expense”. If it doesn’t cross two (annual) balance sheets, it doesn’t really matter. This is good news in terms of clarity, resolution, and moving forward on one of the last remaining items to converge the IFRS and U.S. GAAP standards. There are ambiguities, issues, concerns, et cetera, of course, and there are bright lines (“rules”) that bother the “no rules, please” people and ambiguities (“judgments”) that bother the “clarity, please” people, but at least the train isn’t falling off the tracks.  

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• Switch 302 redirect to 301 with Apache 2 ProxyPass in front of Tomcat 6

  - by Gearóid

  I'm trying to optimise my site for SEO and it seems as though their is a 302 direct in action for the http requests. I'm hosting my app on a Tomcat 6 server which lies behind an Apache 2 server. I use the ProxyPass method (http://tomcat.apache.org/tomcat-6.0-doc/proxy-howto.html) to forward all requests to port 8080 (the port my app is hosted on). I've seen a lot of advice on how to set the redirect type when using the VirtualHost method but none to do with ProxyPass. The app is a Struts app that forwards users on to index.jsp when they hit the base url. Could this also be the issue? I'm grateful for any help on this one! Cheers!

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• Hello PCI Council, are you listening?

  - by David Dorf

  Mention "PCI" to any retailer and you'll instantly see them take a deep breath and start looking for the nearest exit.  Nobody wants to be insecure, but few actually believe that PCI does anything more than focus blame directly on retailers.  I applaud PCI for making retailers more aware of the importance of security, but did you have to make them PAINFULLY aware?  POS vendors aren't immune to this pain either as we have to undergo lengthy third-party audits in addition to the internal secure programming programs.  There's got to be a better way. There's a timely article over at StorefrontBacktalk that discusses the inequity of PCI's rules, and also mentions that the PCI Council is accepting comments until April 15th. As a vendor, my biggest issue with PCI is that they require vendors to disclose the details of any breaches, in effect "ratting out" customers.  I don't think its a vendor's place to do this.  I'd rather have the trust of my customers so we can jointly solve the problem. Mary Ann Davidson, Oracle's Chief Security Officer, has an interesting blog posting on this very topic.  Its a bit of a long read, but I found it very entertaining and thought-provoking.  Here's an excerpt: ...heading up the list of “you must be joking” regulations are recent disturbing developments in the Payment Card Industry (PCI) world. I’d like to give [the] PCI kahunas the benefit of the doubt about their intentions, except that efforts by Oracle among others to make them aware of “unfortunate side effects of your requirements” – which is as tactful I can be for reasons that I believe will become obvious below - have gone, to-date, unanswered and more importantly, unchanged. I encourage you to read the entire posting, Pain Comes Instantly, and then provide feedback to the PCI Council.

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• Storing data offline with javascript

  - by Walker

  My question is about storing data offline and potentially whether I will need to bring in an outside programmer or could this be learned within a few weeks? The website I am working on will have an interface where users will login and go through a series of quizzes in the form of checkbox, drop down menus, and others. Each page/quiz area could have 20-100 total checkboxes in a series of 3-5 rows because of the comprehensive nature of course. This I can do - I know how to code the quiz and return a correct or incorrect answer based on each individual checkbox and present a cumulative score (ie: you got 57% correct). The issue lies in the fact that I would like to save the users results and keep them informed of their progress. When they complete all of the quizzes, I would like to have a visual output of their performance in each area. Storing the output from their results offline is where I think I may run into a problem with my lack of coding experience. I would also like to have a sidebar with their progress of each section (10-15) with a green percentage completion bar or a % correct which would draw from this. I have never had to code something that stores information like this offline - so back to my question - would it be better to learn the language needed or bring in a coder/developer for the back end stuff.

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• Sorting out mSSD acceleration on a Acer M3-581TG

  - by PhonicUK

  I recently purchased a Acer Timeline M3 Ultra, it ships with a 500GB HDD and a 20GB mSSD to use as a cache. First thing I did when I got it was format the drives and install a clean OS (on the HDD, the mSSD has nothing on it) - but now I can't figure out how everything needs to be configured in order to use the mSSD as a cache, it just looks like a standard storage drive. I've poked around in the BIOS and there is a SATA mode setting, but it only has one option (AHCI), most of the documentation I've seen on the subject says that the SATA controller needs to be in RAID mode otherwise 'Acceleration' isn't visible in the Intel SRT menu (which for me, it isn't) I've seen a few things that suggest I just need the correct partition layout, I tried this using fdisk from a Linux LiveCD but got nowhere. Any ideas? The laptop shipped with no recovery media so I'm marginally stumped. I don't have any issue with reformatting again if required.

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