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• JBoss + Apache via ModJK Documentation

  - by Fernando

  I'm trying to serve my application's content on JBoss through Apache. Load balancing is not necessary yet. I've been trying to follow this guide on JBoss' wiki but it seems more complicated than what I'm looking to do, since I'm not trying to get loadbalance to work. I also found this other example, but I haven't been able to make this work. Several trial and error hasn't helped getting too far. Can you recommend any good conceptual tutorials for doing this? These tutorials I've found kind of explain what to do, but don't go too deep into what you are doing. Not only do I want to get this to work, but also learn what I'm doing.

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• Debian on Hyper-V

  - by Tobia

  I installed Debian with kernel 2.6.32-5-686 on a Hyper-V virtual machine. I had to add a legacy network card. I follow this tutorial http://www.microsofttranslator.com/bv.aspx?ref=Internal&from=ru&to=en&a=http://blogs.technet.com/b/abeshkov/archive/2011/03/17/hyperv_5f00_debian.aspx to add Hyper-V driver but when I reboot with the new kernel it crash during bootup. Is there any other way to load hyper-v drivers? I really need to change that legacy network card because my debian machine is going to be used as proxy. Thank you.

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• Is it common for a development position to be extremely mundane and not challenging at all? [closed]

  - by Kim Jong Woo

  Hi guys so I am working at this company as a web developer but after 1 week of working here, I realize the stuff I am doing seem to be very easy stuff compared to what my peers who have been around for longer are doing. I am way ahead of my schedule and finish my projects early but it's because the work is not at all hard or problem solving involved. So I am puzzled why I would be thanked over doing such menial tasks. Is this normal? This is driving me nuts, I ask to be given more work and I do get it and still finish it quickly and accurately. Now I am having this paranoia that they are just conspiring to use me for a short period of time and terminate me. Am I going too far with this? I keep losing sleep over this. On days when I have a full load of work to complete, this uneasiness goes away but so far I feel like I am not being allowed to pursue what I thought I would do like solving and designing solutions. A lot of it doesn't require any thinking, just cleaning up other people's code and closing bug tickets.

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• installing and running google-chrome on an old Ubuntu 7.10 legacy system

  - by 12632

  I am trying to get google-chrome to work on Ubuntu 7.10. I installed it with --force-depends and got it to install, but now when I try to run it, I get this error: /usr/bin/google-chrome: error while loading shared libraries: libnss3.so: cannot open shared object file: No such file or directory Is there a way to still get google-chrome to load even without this dependency satisfied? This is an old system that needs to keep this old 7.10 Ubuntu version and I would like to have google-chrome if possible installed, even if it means no sound or other features that are not compatible.

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• JPEG images not loading on PlayBook (Marmalade + iwgame)

  - by Vexille

  I'm using iwgame on a test project and I was trying to render different resolutions of JPG and PNG images. Everything works fine on the Marmalade Simulator, however once I deploy the game to our PlayBook and run it, only the PNG images are shown. I have declared the images in the MKB file and on a XML file iwgame's using to load the images. I've checked the deployments folder and all images are present in the intermediatefiles/native folder. We're currently using a BlackBerry only license, so we can only test this on the PlayBook, but we do intend to get a Community license and deploy to iOS and Android devices eventually (I'm not sure if this is a problem exclusive to the PlayBook). I really don't know if this is a Marmalade or a iwgame issue. I have a different test project without iwgame and it simply won't run with jpg images (I get the error: 'Could not find handler for extension "jpg"'). While searching for a sollution, I've seen people talking about using libjpg, but I've also found that Marmalade supposedly has integrated native jpeg support (and because of that iwgame has abandoned their jpeg loading support since v0.340), so I don't know what to think. I'm currently using the most recent versions of both Marmalade and iwgame, I believe: Marmalade 6.1.2 and iwgame 0.400. Also, please let me know if there's an easier or better way to do this, such as linking libjpg or something (I'm not exactly sure how to do this). I really would appreciate some help with this, there's a huge difference in size for the images we're planning to use, from a ~500kb jpg file to a ~3.5mb png file. Thanks, guys.

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• Sensitive data in init scripts

  - by Steve Jorgensen

  I'm adapting some examples I've found by Googling to build an init script to run a VirtualBox OSE virtual machine as a daemon. I would like to specify a password for VNC access to the VM, and this must be given as an argument to the VBoxHeadless command. Conventionally, init scripts are readable by standard users, and this seems like a useful convention, but I also don't want the VNC password for this VM to be stored in easily accessible plain text. What's the most appropriate/conventional way to handle this kind of situation? Maybe put a root-readable supporting data file someplace, and have the init script load the value from there?

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• MySQL port 3306 became filtered when configured with Keepalived on Ubuntu server 12.04 lts

  - by Ludwig

  I'm configuring two load balancer (lb01 & lb02) with keepalived for my two mysql server (db01 & db02) with standard port 3306. There is virtual ip address (192.168.205.10) to access it also act as failover, but somehow the web server in the front can't access this mysql server using vip. Here is my config: Keepalived: Only the mysql part that i added here. LB01: virtual_server 192.168.205.10 3306 { delay_loop 6 lb_algo rr lb_kind DR protocol TCP real_server 192.168.205.4 3306 { weight 10 TCP_CHECK { connect_port 3306 connect_timeout 2 } } } LB02: virtual_server 192.168.205.10 3306 { delay_loop 6 lb_algo rr lb_kind DR protocol TCP real_server 192.168.205.6 3306 { weight 10 TCP_CHECK { connect_port 3306 connect_timeout 2 } } } I already comment out the "bind-address=127.0.0.1" part in both server my.cnf. Also, remove all the firewall prog from my ubuntu server (ufw or iptables). Any help? thanks.

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• I can't work locally unless connected to the internet - how to fix?

  - by Rodney

  Hi, In Firefox, when I am disconnected from the net, I want to work locally on my local IIS server (Win XP, Firefox 3.5.10). I do NOT have Work Offline checked but FF says that it cannot find my site (ie. the message from FF if you try to access an online site offline) This applies to any localhost URL. I tried 127.0.0.1 and checked my Host file - that does not work either. If I check Work Offline then it shows the Firefox message that it cannot be reached because I have Work Offline checked. Unchecking it does not help. Then - I load up Safari, copy and paste the URL into that browser and it connects to my development localhost site. It is not just browser caching as I can log in etc. So Firefox will not let me develop locally unless I am connected to the internet, which is a problem. Suggestions please?

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• Installing nvidia drivers causes computer to boot to command prompt.

  - by levesque

  Hi, I have an Asus u30jc laptop, which comes with the Optimus prime graphics card switching technology that is now supported under 2.6.35, so I decided to give it a try. First I made sure the discrete graphics card was activated and then I installed the drivers proposed by the ubuntu software repository (nvidia-current). However, after rebooting all I got was a command prompt. My graphics card is a nvidia 310M. This is on Ubuntu 10.10 64 bits. What can I do to diagnose/identify the source of this problem? UPDATE: The messsages in my syslog tell me to check the xorg log: Oct 11 12:42:59 u30jc-test gdm-binary[1095]: WARNING: GdmDisplay: display lasted 0.053144 seconds Oct 11 12:42:59 u30jc-test gdm-simple-slave[1450]: WARNING: Unable to load file '/etc/gdm/custom.conf': No such file or directory Oct 11 12:42:59 u30jc-test gdm-binary[1095]: WARNING: GdmDisplay: display lasted 0.038176 seconds Oct 11 12:42:59 u30jc-test gdm-binary[1095]: WARNING: GdmLocalDisplayFactory: maximum number of X display failures reached: check X server log for errors Which I did. I found this message in my /var/log/Xorg.0.log : Fatal server error: [ 113.540] no screens found [ 113.540] What does that mean?

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• D-Link DWA-125 constantly disconnecting in winXP, but works fine on ubuntu..

  - by sil3nt

  Hey there, I'm dual booting winXp and ubuntu 10.10. I'm using a DWA-125 usb adapter to connect to my home wifi connection and I'm having this odd issue. First off, in ubuntu the adapter works fine and I have no trouble at all, but when I boot back in XP I get a dlink connetion wizard and the connection times out after every 2 minutes. It's odd because I can actually load up web pages and use the internet for 2 minutes, and then it would disconnect and the whole thing would repeat. I did a system restore on xp and this stopped the whole connect-disconnect thing but once I booted into ubuntu and came back to xp it started all over again!(?). Any ideas as to how I would go about fixing this?

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• How can I prevent seams from showing up on objects using lower mipmap levels?

  - by Shivan Dragon

  Disclaimer: kindly right click on the images and open them separately so that they're at full size, as there are fine details which don't show up otherwise. Thank you. I made a simple Blender model, it's a cylinder with the top cap removed: I've exported the UVs: Then imported them into Photoshop, and painted the inner area in yellow and the outer area in red. I made sure I cover well the UV lines: I then save the image and load it as texture on the model in Blender. Actually, I just reload it as the image where the UVs are exported, and change the viewport view mode to textured. When I look at the mesh up-close, there's yellow everywhere, everything seems fine: However, if I start zooming out, I start seeing red (literally and metaphorically) where the texture edges are: And the more I zoom, the more I see it: Same thing happends in Unity, though the effect seems less pronounced. Up close is fine and yellow: Zoom out and you see red at the seams: Now, obviously, for this simple example a workaround is to spread the yellow well outside the UV margins, and its fine from all distances. However this is an issue when you try making a complex texture that should tile seamlessly at the edges. In this situation I either make a few lines of pixels overlap (in which case it looks bad from upclose and ok from far away), or I leave them seamless and then I have those seams when seeing it from far away. So my question is, is there something I'm missing, or some extra thing I must do to have my texture look seamless from all distances?

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• Apache2 enable .ini mod in /etc/php5/mods-available

  - by GuiTeK

  One can use the a2enmod [module] command to enable mods located in /etc/apache2/mods-available. But what about mods in /etc/php5/mods-available? When I try to enable a mod in this directory (eg. xdebug), I get the following error: ERROR: Module xdebug does not exist! Yet, /etc/php5/mods-available/xdebug.ini exists. I understand a2enmod may work only with *.load files (it makes sense since *.ini files are just configuration files) but then what's the correct way of enabling modules located in /etc/php5/mods-available?

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• Exchange 2010 SP2 OWA performance

  - by Frederik Nielsen

  How do I increase performance in OWA 2010 SP2? I am running CAS on a seperate installation, which has 8GB RAM and 4 CPU cores - running virtualized in a vmware environment. However, the load times are pretty bad, so is there any way to improve those? I am thinking of installing a linux cache-stuff-server in front of the OWA, but will that work? And how should it be done? Allright, I "fixed" it - was just something temporary issue. Thanks for your replies

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• Hybrid drive not booting faster than a normal HD

  - by Nigel Trotter

  I have used Windows 7 to create an image of my existing standard 160GB HD and copied this image back to a bigger 500GB Seagate hybrid drive. After copying the image to the hybrid I had to resize the partition, which was fine but after rebooting a few times to "teach" the hybrid, I have no increase in boot speed. It still takes 20-25 seconds to close down and then over a minute to start up. Is this something to do with the way the image lays itself on the drive indiscriminately? Do I need to load the OS on the drive from scratch to get the benefits? My PC with an i5 processor, is using AHCI mode.

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• What equipment do real ISP's use?

  - by Allanrbo

  In a dormitory of 550 residents, people often mistakenly set up DHCP servers for the whole network by plugging in their private Wi-Fi routers wrongly. Also recently, someone mistakenly configured their PC to a static IP being the same as that of the default gateway. We use cheap 3Com switches at the moment. I know that Cisco switches support DHCP snooping to solve the DHCP problem, but that still does not solve the default gateway IP takeover problem. What sort of switch equipment do real ISP's use so their customers cannot break the network for the other customers? What we ended up doing In case anyone are courious, we ended up doing seperate VLANs for each user. And as a matter of fact, not just the 550 users, but for 2500 users (11 dorms). Here's a page describing the setup: http://k-net.dk/technicalsetup/ (the section "Transparent firewall using VLANs"). There was no significant load on the router server as I feared in one of the comments below. Even at 800Mpbs.

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• Accessing localhost via IIS 7.5 on Windows 7 very slow

  - by Ian Devlin

  (I've asked this over on stackoverflow already, but thought I'd ask here as well) I'm currently running an ASP.NET application on IIS 7.5 on Windows 7. When I access this application on Internet Explorer (either 6, 7 or 8) it is incredible slow and often fails to load at all. There are messages at the bottom saying: Waiting for http://localhost/....... or sometimes waiting for about:blank (I've read that this can be a virus, but I've run all the usual checks and it's not). constantly, but it returns with the usual: "Internet Explorer cannot display the webpage" I've also tried this by using 127.0.0.1 and the machine name, with the same results. I've tried the same application on the latest Firefox, Safari, Chrome and Opera and they all work fine. I've also installed the same application on a Windows Server 2003 machine, and it all works fine via Internet Explorer. I've also turned off the IPv6 setting on the LAN connection. Soes anyone have any ideas why this doesn't work with Internet Explorer and yet does with other browsers?

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• Install Git on my Media Temple (dv) 4.0 server

  - by Chris

  I'm trying to install Git on my Media Temple (dv) 4.0 server. I've followed these instructions: http://wiki.mediatemple.net/w/%28dv%29_4.0:Install_GIT It seems to have "installed", as there are a boat load of files in the following directory: /root/git-2012-06-06 However, when I perform any git command in the server: git: command not found My assumption is that something, somewhere isn't configured properly, but I have no idea where to start. Could anybody lend a hand / offer some pointers? (And if you hadn't guessed, I'm pretty new to all this, so please be kind!) Thanks very much Chris

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• IIS NLB Web Farm to front Single Tomcat Instance

  - by Brent Pabst

  I've got a single Tomcat 6 server that hosts a JSP app. We just spun up a new IIS 7.5 web farm to host our other internal apps. Currently the machine that hosts Tomcat is also running IIS 7 with the ISAPI filter loaded to provide front-end handling for the JSP app. I'd like to move the IIS portion to the web farm to consolidate our IIS presence and let the Tomcat server just serve and run Java and Tomcat. Has anyone done this, is it even possible while ensuring session state is properly maintained? I had it up and running using the IIS Tomcat Connector http://tomcatiis.riaforge.org/ but after a while the communication between the boxes slowed and pages would not load. In addition it seemed like some of our authentication tickets were timing out. Thanks for any ideas or reference material!

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• Harvard vs. Von Neumann architecture

  - by user32569

  Hi. Our teacher told us, that Harvard architecture is the most evolved and produced architecture today and towards future. but I thing becouse os massive averhead of x86 and Von Neumann nased ARM systems that actually Von Neumann is the most used architecture today. Yes, MCUs with Harvard are even more produced, but since they all have just minor purpose (compared to x86 and ARM based) that Von Neumann is actually the one. Or is it really Harvard? And second, I know this is strange question, but does any architecture combining both exists? to have separate memory for data and programs, therefore faster instruction processing, but still able to work with these as Von Neumann? To be able o load amd unload programs to program memory on the fly? Isnt this the way the x86 should have go? Or would there be some bottleneck that pure Von neumann solves? Thanks.

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• diagnosing random power down crashes on a hackintosh [closed]

  - by Iain

  I have a hackintosh running on a Gigabyte P55M UD2. It has run without a single issue as a hackintosh for about 9 months, and the machine is about 2.75 years old. Never had issues when it was just linux box. Power supply is 750 Watts. It recently started spontaneously rebooting, no seeming connected to any particular use case or ram/cpu load. There is no hanging or anything, just suddenly acts like the power went out. The frequency of which seems to be increasing. I've tried using just one of each of the two ram sticks, and it happens with either one in. I'm not sure what to try next, is there some way of determinging whether it's a mobo, cpu, or powersupply issue short of replacing them all? thanks! Iain

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• First requests are painfully slow

  - by winSharp93

  I am running Redmine under IIS using Zoo. Installation was done using the Web Platform Installer and the default configuration has not been touched. However, when using the application, the first requests take very long to complete (sometimes more than one minute). During that time, the ruby.exe causes some CPU load (about 15%). According to the log files, it's mainly the views taking that long to render: Started GET "/redmine/login" for IP at 2012-09-04 09:54:08 +0200 Processing by AccountController#login as HTML Rendered account/login.html.erb within layouts/base (42150.5ms) Completed 200 OK in 43508ms (Views: 43008.5ms | ActiveRecord: 0.0ms) Rendered account/login.html.erb within layouts/base (42435.1ms) Completed 200 OK in 44100ms (Views: 43523.3ms | ActiveRecord: 0.0ms) After the initial delay, further request times are totally acceptable. Any ideas on how to speed up the warmup time?

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• Nginx & Lua: Hacks, optimizations & observations

  - by Quintin Par

  Following this post on using Lua to increase nginx’s flexibility and in reducing load on the web stack I am curious to know how people are using Lua to enhance nginx’s capability. Are there any notable hacks, optimizations & observations using Lua? Hacks that people have used to discover capability with Nginx that would otherwise be complicated/impossible with a webserver or reverse proxy? Edit: Links: http://thechangelog.com/post/3249294699/super-nginx-killer-build-of-nginx-build-for-luajit-plus http://skillsmatter.com/podcast/home/scripting-nginx-with-lua/te-4729 http://devblog.mixlr.com/2012/06/26/how-we-use-nginx-lua-and-redis-to-beta-ify-mixlr/

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• HA Proxy and Disaster Recovery - Only access server if others are down?

  - by ben2004uk

  Why I expect this is not the best way to solve the problem, I got thinking tonight. I'm thinking about geo-locating servers. Given we have a load balancer + two servers to handle traffic in NA (North America) and one server in the EU. If the two US servers die, is it possible to get HAProxy to direct traffic automatically to the EU one. However, I don't want to use a roundrobin approach for the EU - just the two US ones. The EU should only be hit when the other two are down. Does anyone know how to configure HAProxy to do this? Thanks Ben

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• Introducing the New Boot Framework in CE 7

  - by Kate Moss' Open Space

  CE 7 introduces a new boot loader framework, BLDR (platform\common\src\common\bldr\). Some people like its powerful and flexbility, others may feel its too complicate as a boot loader framework. Despite to the favor, it is already there; so let's take a look at its features. Unlike the previous BL framwork (CE7 still provides it in platform\common\src\common\boot\) is a monolithic library, the new framework has more architecture structure. It not only defines main body but also provides rich components, such as filesystem (BinFS/FAT), download transportations, display, logging and block devices: bios INT13, FAL, IDE, Flash ( and etc. Note that in the block device category, the FAL is for legacy FMD/FAL, Flash is for latest MSFlash. Some of you may have encountered MSFlash MDD/PDD compatible partition is hard to created in bootloader and now it provides a clean solution! (Since this is a big topic, I will introduce it in future post) Today, I am going to show you some basic helper components - Image Loading functions. When OS image stored in the block device, it can be a file format, says your NK.BIN in the FAT volume or a RAW format, says the image is programmed to a BINFS partition. For the first one you can use BootFileSystemReadBinFile (platform\common\src\common\bldr\fileSystem\utils\fileSystemReadBinFile.c) and use BootBlockLoadBinFsImage (platform\common\src\common\bldr\block\utils\loadBinFs.c) to load from a partition. Need a sample code? No problem, the BootLoaderLoadOs in platform\cepc\src\boot\bldr\loados.c just provide a perfect example.

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• How to install Mac OS X Snow Leopard server on any virtual machine with DMG?

  - by Eonil

  I'm trying to install Mac OS X Snow Leopard Server on VirtualBox. I know this is duplicated question, however another questions have no fine answer. I'm trying to install on VirtualBox on iMac. So this is pretty legal. But the problem is I want to install with DMG image. Because installing DVD drive is too slow, and I have to install Mac OS X many times. And taking DVD disc from box is annoying too. But VirtualBox fails installing. It couldn't load kernel. It installs well with DVDs. Is there any way to do this? I'm considering using other VM solutions like Parallels or VMWare if they can support install from DMG images well. If you know about them certainly, please let me know.

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