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Articles indexed in April 2012

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• Different network response for indentical co-located machines

  - by Santosh

  We have a situation as follows: We have a two different virtual machines (VMs) on some remote server farm. The machines are identical in terms of hardware/software(OS) configurations. We have a J2EE application running on JBoss on each of those two machines. These two applications are of different version sav V1 on VM1 and V2 on VM2. We observed some degraded response time for application V2 when accessed via public URL. When we accessed the application through a secured VPN, there is hardly any difference. The bandwidth test (upload/download speed, ping etc) shows that VM1 is responding better when accessed via secured VPN. We concluded that the application does not seem to have performance issue. Because, it that's the case the performance degradation should also be there when access via VPN. So we concluded its the network problem. But since those two identical VMs are on same network we are looking for the reasons for different responses. My question is, given the above situation, what could be reasons for such a behavior ?

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• SMTP server closes connection unexpectedly

  - by janin

  I'm writing a python program to send emails, and when trying to send to yopmail, hotmail and some other hosts the connection gets closed by the server without a message. I tried connecting directly with netcat and the same thing happens. Here's what the exchange looks like : $ nc smtp.yopmail.com 25 220 mx.yopmail.com ESMTP *** ehlo mx.myhost.com 250 SIZE 2048000 mail FROM:<[email protected]> 250 OK rcpt TO:<[email protected]> The connection is just closed abruptly at this point. On other hosts, like my ISP's, everything goes fine. I've checked the blacklists but my IP is not listed. Any idea what's going on? Edit: My IP is not listed in any blacklist. I own myhost.com, but I don't have an SPF record. I'll add one and update this post when the record has propagated. Edit 2: with the SPF added the email is now accepted and Hotmail adds a Authentication-Results: hotmail.com; sender-id=pass header to the email. However it gets classified as spam, but I guess that's another matter. Thanks for your help.

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• Intermittent extrememly long response times when downloading documents

  - by pap

  I have a Java web application running om Tomcat 7 with an Apache httpd 2.2 fronting with mod_jk/AJP. One part of the application is serving files (up to 4mb size). Now, normally this all runs very smooth with stable, low response-times. However, in rare instances (<0.1% of downloads), the downloadtime will go beyond 1 minute. After activating the ThreadStuckValve in Tomcat, I can see that the long responses seem to be stuck at org.apache.tomcat.jni.Socket.sendbb(Native method) i.e network I/O. At most, these long-running downloads take 5 minutes, which I strongly suspect is because of the default 300 second timout in Apache 2.2 (http://httpd.apache.org/docs/2.2/mod/core.html, "TimeOut directive"). To me, this looks like network problems. The Apache timeout (if that is what is kicking in at the 5 minute mark) indicates that ACK packets are not being transmitted correctly. My questions are what could be causing this? Closed browser at receiving end but socket not signaled as closed properly? Packet loss or some other network failure in transit? Where would I start troubleshooting this? We're running Tomcat and Apache on Windows server 2008-R2 in a vmware virtualized server.

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• MySQL moving ibdata & ib_logfile

  - by XoR

  I'm trying to move ibdata & ib_logfile on ssd drive. I tried this way, but it don't work: service mysql stop cd /var/lib/ cp -ra mysql mysql_backup cp -a mysql/ibdata1 mysql/ib_logfile* /ssd_drive/mysql my.cnf looks like this (relevant parts): innodb_log_group_home_dir=/ssd_drive/mysql innodb_data_home_dir=/ssd_drive/mysql After all changes I get following errors: InnoDB: Unable to lock /ssd_drive/mysql/ibdata1, error: 13 InnoDB: Check that you do not already have another mysqld process Do I need to remove some lock files, or there is something else that I forgot... Also I setup mysql apparmor so it can rw on this directory, and rebooted afterward: /usr/sbin/mysqld { ................. /ssd_drive/mysql/* rw, ................. }

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• Restoring MySQL dump - ERROR 2006 (HY000)

  - by matcheek

  I am just trying to restore a mysql dump. Below are the command and error message. Can anybody give me some clues how to approach this? 10:54:16 Restoring C:\Users\matcheek\Documents\dumps\Dump20120405-1.sql Running: mysql.exe "--defaults-extra-file="d:\temp\tmpbvhy4i.cnf" " --host=127.0.0.1 --user=root --port=3306 --default-character-set=utf8 --comments < "C:\\Users\\matcheek\\Documents\\dumps\\Dump20120405-1.sql" ERROR 2006 (HY000) at line 271: MySQL server has gone away

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• Postfix configuration for load balancing

  - by Naval

  Server A should take mails from a php script which is running on other machine . Now server A should distribute all this mail to its remaining 3 Nodes(3 server B,C,D for relaying mails which have different IP and Domain name) here the architechture which i want ---B php script(for mail generation)----server A(postfix mta) ---C ---D how should i configure postfix main.cf file for this ? plz help me out in this.

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• Loading dependencies for custom puppet functions

  - by Ben Smith

  I have written a custom puppet function, which is working fine, that depends on the cloudservers gem (a Rackspace client library). This is fine if I have pre-installed the gem on a server before running puppet but totally breaks if I have not installed the gem as the function seems to be run during the 'compilation' sweep, well before my package definition is realised. Here's what my .pp looks like, with get_hosts the function that requires the cloudservers gem. package { "rubygems": ensure => installed, provider => "gem"; } package { "cloudservers": ensure => installed, provider => "gem", require => Package["rubygems"]; } class hosts::us { $hosts = get_hosts("us") hostentry { $hosts: } } define hostentry() { $parts = split($name, ',') $address = $parts[0] $ip = $parts[1] $aliases = $parts[2] host{ $address: ip => $ip, host_aliases => $aliases } } Is there a way to stop the function getting run so early, or at least having it's run depend up the library being installed. Alternatively, is there a way that I can add dependencies somewhere in the functions folder that will be available to the function?

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• OpenWrt vs DDWrt

  - by Ioan Paul Pirau

  I have a TP-Link Wr1043ND router and I want to install one of these two firmwares: OpenWRT DD-WRT I read that I can install custom packages and do much more than I can with the original firmware. I would like to ask someone with experience in using both OpenWRT and DD-WRT which he would recommend and why. And to give a few reference points I'm interested in: reliability – network stability both on cable and wireless and on the usb drive performance – network speed, very important also usb drive speed configurability – the possibility to add extensions such as a torrent client, FTP, SSH, WWW and SVN server directly ease of use – the ease of installation and configuration of the router support/docs – how much info there is if you stumble upon a problem and you have to find some documentation, or if there's any free support (but that's a longshot) Of course I don't imagine that I will find the perfect firmware and that one is vastly superior over the other. Also if there's anyone out there who uses one of these firmwares on a TP-Link Wr1043ND, it would be great to get some feedback about the impact of the changes from the original firmware. P.S. I'm open also for Tomato if it's the better one.

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• Microsoft Office Compability Pack "The converter failed to open the file" error & "This is a pre-release version"

  - by HaydnWVN

  What issues have people encountered with older OS's (2000, XP) and olders versions of Microsoft Office (2000, XP, 2003) with the 'Microsoft Office Compitibility Pack'? I have a couple of Windows 2000 client PC's encountering different errors when attempting to open .docx or .xlsx documents, some with Office XP and the others with Office 2003. Reading through forums it appears that the different versions of the compatibility pack, not all were compatible with Windows 2000 (versions 3 & 4 are not). There are also Service Packs for the Compatibility Pack. With these Windows 2000 clients, it seems i need the Compatibility Pack version 2, then to install the Service Packs, yet i'm unable to find a link for version 2 of it. First error message: "This is a pre-release version of the Compatibilty Pack and can open pre-release Office 2007 files only." Is solved below. Second error message: "The converter failed to open the file." Is still on going.

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• Eclipse: would more CPU cores with HyperThreading help increase speed?

  - by Dylan

  I'm programming a very large project in Eclipse. Right now I use a dual core machine with 2GB RAM, but Eclipse is sometimes busy for minutes (refreshing/indexing/building), so I'm upgrading to a new machine (with 16GB RAM and an SSD). Now I must choose between an Intel 2500K or an Intel 2600K that has HyperThreading. The price difference is about $100. Would that be worth it, for Eclipse, or is more memory/faster drive much more important for Eclipse ? Can Eclipse make use of the HyperThreading at all?

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• Optical Audio out stuck on on a MacBook

  - by Clinton Blackmore

  Apple have made an interesting headphone port for the MacBook (and some other Intel Mac models). It works like a standard jack: nothing plugged in - audio comes out of built-in speakers headphones/external speakers plugged in - plays through headphones/external speakers but you can also use a special adapter (which trips a tiny microswitch) to get an optical audio out signal (which you can presumably plug into a nice surround-sound system). This is all well and good except when, like auto-tracking, it doesn't work, and you are left with nothing to adjust. Users report that they get no sound when they have nothing plugged in and that a red light emanates from the headphone port. If you go to System Preferences - Sound - Output, it will say (IIRC) "Optical Out" instead of "Internal Speakers". The only solution I'm aware of is to try to reset the switch by inserting and removing a set of headphones or a toothpick, perhaps wiggling it inside of the port, and hoping that you luck out and get it. Are there other ways to fix this problem? Does anyone know where the microswitch is or have a good technique to reset it?

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• Give the www user chmod permissions

  - by Derrick

  Ive got a website (run on Ubuntu Server) that needs to modify and delete files, every now and again it comes across a file that it needs to run "chmod" on in order to perform it's operations. However it seems as tho the 'www' user does not have permission to run 'chmod' on any files. So I'm looking for the command to allow the 'www' user to do its thing on files inside the /var/www folder and also the /var/logs folder for example. Thanks.

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• How to convert Kindle books into PDF format?

  - by verve

  I'm new to digital books and I use the Kindle app for Windows to read the books I bought but I hate how I can't read the bottom paragraph of a book in the Kindle app in the centre of the monitor; I have to bend my neck down and it gets sore fast. Problem is that I can't move the Kindle book page up or halfway as when I'm reading a PDF document; if you try to move the page in Kindle it skips to the next new page. So, I thought maybe converting my books to PDF will solve the problem. How do I convert Kindle books into the PDF format? Does anyone have another solution? Perhaps a fancier reader that allows me to scroll Kindle book pages? Windows 7 64-bit IE 8

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• Making Google Talk messages appear on all logged in clients

  - by Ryan Hayes

  We're using Google Talk as our unofficial-official chat client around the office at work. One thing that poses a big problem almost every day is the fact that Google Talk only sends a message to the clients that you last used. Even though you may be logged into GTalk on 3 different machines, if you start talking on one machine, that becomes your "active" machine, and if you go to another machine, you will still only get messages on the last active machine. Is there a way that you can force Google Talk to send messages to ALL logged in clients, regardless of which client you are actively using? That way, you don't miss any messages during the time between when you get up from the active machine and then make the new client "active".

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• Word 2010 Style Sets and Multilevel Lists

  - by Stevia

  In Word 2010, how can you create quick style sets that include multilevel lists (include being the operative word)? As background, I have created a set of styles for a long agreement form and assigned them to levels in a certain custom multilevel list. I then also saved those styles as a quick style set called Long Agreement. I have saved those styles in my normal template. That all works fine for assigning styles to a Long Agreement. What I'd like to do next is create a second style set called Short Agreement. I will assign certain styles to that style set. The issue is that I don't see how to tie a different custom multilevel list to those Short Agreement styles. When I click on Change Styles, Short Agreement [style set], and I apply those styles, how can I get it to automatically use the multilevel list that I assign to short agreements?

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• How to kill unkillable Python-processes running as root

  - by Andrei

  I am experiencing an annoying problem with sshuttle running it on 10.7.3, MBA with the latest firmware update -- after I stop it (ctrl+c twice), or loose connection, or close the lid, I cannot restore it until I restart the system. The restarting takes notably more time, than it would normally take. I have tried to flush ipfw rules - not helping. Could you advice me how to restore sshuttle connection (without restarting os)? The following processes remain running as root, which I do not know how to kill (tried sudo kill -9 <pid> with no luck): root 14464 python ./main.py python -v -v --firewall 12296 12296 root 14396 python ./main.py python -v -v --firewall 12297 12297 root 14306 python ./main.py python -v -v --firewall 12298 12298 root 3678 python ./main.py python -v -v --firewall 12299 12299 root 2263 python ./main.py python -v -v --firewall 12300 12300 The command I use to run proxy: ./sshuttle --dns -r [email protected] 10.0.0.0/8 -vv The last message I get trying to restore the connection: ... firewall manager: starting transproxy. s: Ready: 1 r=[4] w=[] x=[] s: < channel=0 cmd=PING len=7 s: > channel=0 cmd=PONG len=7 (fullness=554) s: mux wrote: 15/15 s: Waiting: 1 r=[4] w=[] x=[] (fullness=561/0) >> ipfw -q add 12300 check-state ip from any to any >> ipfw -q add 12300 skipto 12301 tcp from any to 127.0.0.0/8 >> ipfw -q add 12300 fwd 127.0.0.1,12300 tcp from any to 10.0.0.0/8 not ipttl 42 keep-state setup >> ipfw -q add 12300 divert 12300 udp from any to 10.0.1.1/32 53 not ipttl 42 >> ipfw -q add 12300 divert 12300 udp from any 12300 to any not ipttl 42 Update: $ ps -ax|grep python 1611 ?? 0:06.49 python ./main.py python -v -v --firewall 12300 12300 48844 ?? 0:00.05 python ./main.py python -v -v --firewall 12299 12299 49538 ttys000 0:00.00 grep python

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• SharePoint Item Edit Form (editform.aspx) keeps closing webparts - MOSS 2007

  - by poolybit

  We have a custom list within MOSS 2007 which sporadically closes the edit forms web part, despite the fact that the web parts property 'allow close' is unticked. The only way to make the form work again is to edit the page in SharePoint Designer and untick the option of 'web part closed', this then allows the form to function but at a seemingly random interval it will close itself again. There is quite a large user base accessing the site/list at anyone time, also note this has happened once on another list on another site collection. Has anyone else experienced this issue before or can offer any advice?

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• Building a PC, advice on SSD/Hybrid Hard Drives

  - by Jamie Hartnoll

  I am looking at building a new PC, it's mainly for office (graphics heavy) use and programming. Looking for good performance with opening and closing programs and files as well as a fast boot. I plan to have 3 primary hard drives Windows 7 Programs (photoshop etc) Current Files (There'll also be a large storage capacity back up drive, but this will be the Seagate drive I already have.) So, my question is, looking at standard "old fashioned" hard drives and SSD drives, obviously there's a massive price difference. I have been looking at drives like this: http://www.ebuyer.com/268693-corsair-120gb-force-3-ssd-cssd-f120gb3-bk-cssd-f120gb3-bk and this: http://www.ebuyer.com/321969-momentus-xt-750gb-sata-2-5in-7200rpm-hybrid-8gb-ssd-in-st750lx003 Having no experience of using either I don't know what's the most efficient thing to go for. Clearly the SSD will have better performance, but: If, for example, I had an SSD for Windows (say about 100gB), that would clearly give me the boot speed I want, then I guess my real questions are: If I were to buy one more SSD, would it give the greatest improvement on standard performance if used to store programs, or currently used files? Given that the OS is on an SSD, should I not bother with the 3 drives and instead, partition that Hybrid drive to store programs and currently used files on it? Obviously, option two is cheaper and option one could cause me storage issues, but that's when I can dump files I am not currently using onto another drive. Any, I am open to suggestions... so what do you suggest?!

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• How to expand Raid 5 on ICH10 - Gigabyte ex58-ds4?

  - by NeverEatAlone

  I was wondering if there is a relatively simple way to expand my HD space. My setup is 4 x 640 GB drives. Motherboard has 4 ports on 1 controller and 2 ports on another controller, however they cant be joined. I would like to somehow get more store space in raid configuration. One scenario that I can see working is replacing one 640 drive for a 2TB drive. Waiting for Raid to rebuild. Rinse and repeat. However, I have no idea if I would be able to even see/access the new space. All alternatives / ideas are welcome. Thank you

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• BSOD Error When Running Windows Phone Emulator

  - by Akshat Mittal

  I am getting a BSOD Error when Running Windows Phone 7.1 Emulator on Windows 7 Ultimate 64bit, Each time I run the Emulator, it Results in Blue Screen. This is a Fresh Install, This Error also Occurred with my last Windows Install (That is why I formatted the Windows Again), I have already Tried to Re-install it, it also shows "Windows Phone Emulator is Doing a Complete OS boot" (Even at Fresh Install, I know it happens when using Unlocked Emulator Images). I am not able to Test any of my app. Please Help !! EDIT: I am not Running a VM, it is on a Physical Machine.

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• CodeLobster PHP Edition 4.0.1 disponible : l'éditeur portable gratuit pour le Web rationalise et simplifie le processus de développement

  CodeLobster PHP Edition 4.0.1 disponible : l'éditeur portable gratuit pour PHP HTML, CSS, JavaScript rationalise et simplifie le processus de développement Web CodeLobster PHP Edition, l'environnement de développement Web gratuit est actuellement disponible en version 4.0.1. CodeLobster PHP Edition rationalise et simplifie le processus de développement en PH. Il propose un EDI pour les langages HTML, PHP, JavaSript et CSS, avec autocomplexion et coloration syntaxique. Le code mixte est encouragé, si bien que le domaine HTML sera mis en valeur en tant que HTML, le PHP en tant que PHP, et Javascript en tant que Javascript dans le même dossier. Pour PHP, la structu...

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• Windows 8 : Microsoft veut supporter plus de langages dans WinRT, les objectifs de la firme dévoilés lors de Lang.NEXT

  Windows 8 : Microsoft veut supporter plus de langages dans WinRT en plus de ceux existants Microsoft a décidé d'introduire, pour Windows 8 (son futur système d'exploitation pour PC et tablettes), une nouvelle couche pour le développement d'applications. WinRT (Windows Runtine) propose de nouvelles API pour la conception des applications de style Metro. La plateforme supporte plusieurs langages, dont XAML pour la conception de l'interface utilisateur, associé à C#, VB.NET ou C++, ainsi que HTML5, JavaScript et CSS. Lors de la conférence Lang.Next qui s'est tenue cette semaine, Microsoft a essentiellement porté son attention sur WinRT et a répondu à plusieurs inquiétudes qu...

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• Participez à la traduction des spécifications HTML5 et CSS3 ! Rejoignez l'équipe de traducteurs et de relecteurs du projet

  Bonjour L'équipe web vient de se lancer dans un grand projet de traduction : traduire les spécifications CSS 3 et HTML 5. Pour développer ce projet, nous cherchons des traducteurs et des relecteurs anglais/français qui pourraient nous aider. Nous avons donc besoin de vous. Il n'est pas nécessaire d'avoir de grandes disponibilités, vous pourrez choisir dans une liste les modules ou sections que vous allez traduire en fonction de leur taille et du temps que vous pouvez y consacrer. Les relecteurs auront pour fonction d'effectuer une relecture croisée entre la version anglaise et française dans le but d'en vérifier la bonne traduction (respect du sens par rapport à la version originale, correction des tournures de phrases, des...

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• Superposer plusieurs ListView en QML, un article de Christophe Dumez traduit par Thibaut Cuvelier

  Bien qu'il puisse sembler que l'utilisation de deux ListView soit assez courante, elle n'est pas documentée actuellement dans un exemple QML. Ces exemples QML ne considèrent qu'une ListView par écran, qui a les mêmes dimensions que cet écran et est flickable pour naviguer dans son contenu.. Au cas où on a besoin de plusieurs ListView l'une au-dessus de l'autre, cela devient plus délicat et le code doit être adapté.

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• Summary: Cloud Computing

  - by A&C Redaktion

  Im deutschsprachigen Oracle Partner Deutschland Blog veröffentlicht Alliances & Channel Germany regelmäßig spannende Hintergrund-Artikel und tolle Videos. In unseren "Summaries" fassen wir die interessantesten Themen für Sie zusammen. Heute: Cloud Computing Das Thema Cloud ist in aller Munde - aber was ist das eigentlich, die Cloud? Die Antwort gibt es hier:  Angela Jacobsen erklärt die Cloud Mit Solaris 11 bringt Oracle das erste Betriebssystem für die Cloud auf den Markt: Wolkig und heiter Der Oracle Gold Partner esentri widmet sich als einer der ersten Partner in Deutschland mit großem Engagement der Aufgabe, die Kunden auf dem Weg zum Cloud Computing zu begleiten: esentri stellt sich der Herausforderung Enterprise 2.0

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