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• What is and what is not replicated in a glassfish cluster with a mod_jk load balancer?

  - by Navigateur

  I have a Glassfish (3.1.2) cluster over 2 computers as nodes, with a mod_jk load balancer. Are servlet instance variables replicated perfectly? If not, how do I make sure it is? Are all actions, including method calls and disk writes, replicated perfectly? If not, how do I make sure they are? These may seem like stupid questions, but I'm not seeking "load balancing" as much as I am seeking exact replication to enable future upgrading without any service interruption. How do I achieve this if it is not already the case?

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• When I try to install Windows 7 on dell inspiron 1420 which came with Ubuntu freezes at the beginnin

  - by draganstankovic

  I have searched many forums and tried a lot of suggested solutions but nothing works. I am sure that installation disk is ok cause it worked before (I was able to install Windows7 on my other notebook - MSI). What happens is: I boot with installation CD, it says 'Windows is loading files...' Then it says Starting Windows (mouse laser works at that moment). Then I get the screen with window which has a title "Install Windows" with options to choose language, keyboard, etc. and asking me to click next. But, the problem is that at that moment mouse and keyboard don't work at all. Mouse's laser is turned off, and if I press CAPS LOCK on keyboard it doesn't turn the LED on. Do you have any suggestions? Thanks!

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• Connections to Cotendo CDN servers are unreliable

  - by user139050

  I've been having a lot of trouble viewing certain websites - Gawker Media, DeviantArt, etc. - and through further investigation they all appear to be using a CDN called Cotendo. On my machine, and only this one, connections reset themselves midway through the download most of the time. This is not browser-specific; even wget (Cygwin) is unable to download anything without retrying a few times. This happens inside virtual machines as well. Unfortunately, I'm pretty stumped on why this is happening. My hosts file is empty (except for a couple LAN-specific things) and I've checked a few different DNS servers, but I can't really think of anything else to try. Anyone have any ideas?

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• Windows 7 won't recognize my second hard drive after reinstall

  - by Shadur

  I recently suffered a total hardware crash on my windows C: drive. Fortunately, I had a spare disk on hand and set about reinstalling. For some reason, during the install it decided to declare my second windows drive as the booting drive, but once the installation was completed it completely and utterly refuses to acknowledge the filesystem -- I'm not even seeing a drive letter, while it /does/ find the linux partitions on the other two drives (even if it can't read any of them). My first (and most important) question: How can I get windows to re-acknowledge the drive, preferably without losing all the data on it? My second question: How can I tell windows to set up its boot loader on the new C: drive?

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• repair window-xp - access denied for "document and settings" through command line

  - by Or A

  hi, i'm trying to repair my windows xp and it fails to reboot (bad sector or something). i'm using my dell recovery disk and then select the "Repair" option which takes me to the command line application when i can browse my files and folders (like with cmd.exe). however, when i'm trying to access the "Documents and settings" folder, it gives me access denied. is there any way to override it? is there any other way to access my documents and settings through other method? I'm just trying to recover some files and copy them to another drive on my computer and then reinstall my winxp. Thanks for the help

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• Using windows 7 and fedora

  - by vedant1811

  I need to partition my hard disk for windows and fedora (root, swap, users). I thought of creating 3 (primary drives). 2 small ones (~5GB) each for win7 and fedora and a large (~700GB) for common files (pictures, vidoes, documents, etc.) one. Please Tell me which file systems to use in each case and the set-up of primary and extended partitions. Also I want to know, where and on which file system should the Linux Grub (my choice of OS chooser) be installed. I have just a bought a new Asus K53S and using the Fedora Installer Partitioner (Anaconda). Your help is greatly appreciated.

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• Ubuntu upstart hangs on interactive start & stop

  - by danorton

  How do I get Ubuntu upstart to not hang on interactive start & stop? I have created many upstart scripts that work fine during init, but often hang when I enter them at the console. If I CTRL+C out, all that happens is that the job changes state. The script is never run. I’m running Ubuntu Lucid on a Xen virtual server with a Linux 2.6.39 kernel. Below is merely a representative example of many scripts that behave this way: description "apache2" start on local-filesystems \ and (net-device-up IFACE=lo) \ and (runlevel [2345]) stop on runlevel [016] respawn respawn limit 10 5 expect daemon script . /etc/apache2/envvars /usr/sbin/apache2ctl start end script

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• What components should I upgrade to squeeze more life of my pc? [on hold]

  - by Jared

  Hi my current specs are CPU: Intel Core i5 750 2.66 GHz, Socket 1156 Motherboard: Asus P7P55 LX Motherboard, Socket 1156, 4xDIMM DDR3, 2xPCIe-16, 3xPCI, 2xPCIe-1, 14xUSB2, Audio, 1xATA, 6xSATA, RAID, ATX HDD: Seagate Barracuda 7200.11 ST31500341AS Hard Disk Drive, 1500GB, 7200rpm, 32MB Cache, SATA-2 RAM: G.Skill Ripjaw F3-12800CL8D-4GBRM, 2x2GB, DDR3-1600, PC3-12800, CL8, DIMM Video: MSI Radeon 5850 R5850-PM2D1G Video Card, 1024MB, DDR5, PCIe-16, DVI, CrossFire, HDMI PSU: Vantec ION2, 620W ATX PSU, SLI Ready, Black Firstly I know it badly needs an SSD, for which I'm thinking of the Samsung 250gb 840 EVO series. The ram could do with another 4GB, for which I am thinking of replacing the 2x2GB for 2x4GB of the same type. My video card is struggling with the latest releases, so vitally should I ditch the video card and go for something newer (ATI 7850, GTX 660?) or try and get another 5850 for crossfire support? Bearing in mind 5850's are sort of hard to come buy now as they are not stocked in shops usually, which means they have to be bought second hand.

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• Java on 256MB system?

  - by Mike S.

  For a school project, I've registered a free VPS on a hosting provider (pipni.cz). It has 256MB RAM: Mem: 262144k total, 148104k used, 114040k free, 0k buffers It's running on Debian Squeeze. I always get this error when I run a Java program: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I tried to use Xms, Xmx, Xss with low values and still same result. ulimit -v gives me "unlimited". My application will be pretty simple and I need to use rmiregistry also. Can somebody help?

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• New Kingson SSD drive fails after 1 week

  - by user35356

  I upgraded the hard disk in my notebook to a 128GB Kingston SSD V100. Everything worked fine for about a week then out of the blue the notebook would not boot up any more. A black dos-like screen was shown with the options to try and boot normally or attempt to repair windows. Neither option would do anything. When I removed the drive and tested it in an external usb case no other computers are able to access the drive either. Is there anything I can try to fix it myself? The drive is partitioned into three drives and when it's connected through an external usb case to another computer I can see the partitions, just can't access anything on them. Does this mean the drive might be recoverable?

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• Long term system health monitor

  - by user30336

  As an experienced user, I sometimes notice that things are not going well with my computer. For example, my backup drive recently started cycling up and down, so I guessed it was probably dying, and replaced it. I detected this with my ears. Windows did not seem to notice or care. There ought to be software that monitors overall system health by keeping track of things like this, so that unusual events or increasing error rates will not be shrugged off. Among other things: disk errors that are recovered, corrupt network packets (at above the baseline expected rate) and crashes of trusted programs are early warnings. Is there any software that tries to use this kind of monitoring to warn of impending trouble?

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• can power supply affect I/O

  - by user101289

  I have a dev server machine running Ubuntu 12.04. For a long while it's been throwing intermittent errors where it would suddenly tell me "File system is read only" or drop into a GRUB error console on boot. I've done disk checks, bad blocks, etc. and no real problems with the main SATA drive were detected. Finally the drive would not be detected at all-- but neither would other drives I plugged in (via SATA). I plugged the supposedly "bad" drive into another server and it worked fine, no issues, for days-- so I assumed the motherboard had a bad SATA controller, and replaced the motherboard with an identical model. I replaced the drive into the original machine with the new motherboard, rebooted-- and the same issues-- I/O errors, failure to read the drive at all, dropping into GRUB, etc. I'm wondering if there could be some other issue with this machine, that's not related to the drive-- possibly power supply? Thanks for ideas

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• How to recover logical volume deleted with lvremove

  - by John P

  I am on CentOS 5.5 and am running Xen. I have a large volume group that I create logical volumes on using lvcreate. Today I had a customer cancel her account, then change her mind about an hour later. Unfortunately I had already removed the LVM her Xen image resided on. (just using a standard lvremove ). There has been no other LVM activity on this disk since then (nothing else added or deleted). Is it possible to "undo" a lvremove, or recover logical volume? If so, how would I go about it?

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• Turn 2 USB type A ports (receptacles) into an extension cable with 2 type A receptacles using Linux?

  - by Tianyang Li

  I'm currently trying to connect 2 USB devices together, but both ends are type A plugs. Before I buy a physical extension cords with 2 type A receptacles, I'd like to know if I can connect these 2 devices together at all by passing data "transparently" through a Linux box with = 2 USB ports. I'm actually trying to connect a keyboard to an Android phone, and I want to first try if it can work by using a Linux box as a "virtual" USB extension cord. Has anybody done something like this before? Thanks!

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• Can You Specify Where LVM Snapshots Are (Initially) Stored?

  - by bottles

  Disclaimer: this is my first time using lvm. Upon RTFM, it appears that LVM snapshots are automatically stored in the same directory as the original logical volume. In my case, that would mean the /dev directory. This isn't very nice, because there's not enough disk space in there for me to store a large snapshot. So when I run a command like lvcreate --size 1G --snapshot --name snapshot /dev/lvmData/usr, I need an additional 1G of space free in /dev? Is there any way to specify a different directory in which to store my snapshot?

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• How can I retrieve "remembered"(stored) wi-fi password from a win. 7 device?

  - by user180880

  I have access to PC, and I am a standard user. Everything(incl. "show charecters" tickbox at wiriless menu) requires admin access. Now, that said machine is actually like a big tv with touch. Type-stuff is handled by virtual keyboard of windows. I can reach to c:\ProgramData\Microsoft\Wlansvc\Profiles\Interfaces and can see-open files there, which is I assume where passwords stored are. Now the problem is that these passwords is encypted. I'm ok with if there is a way with changing/resetting admin password as well. Considering this device has nothing but massive amounts of usb(yep, not even cd-dvd // rw) the only way is from inside or with usb without admin rights.

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• Can I move files from a laptop hard drive with a corrupt sector to a USB hard drive?

  - by Corey

  I have a hard drive that is on its way out and won't boot to Windows 7. The Windows partition takes up the whole disk. I thought I would try to recover some recent files that hadn't been backed up. Assuming the files are recoverable, how can I explore the drive that has the corrupt sector and transfer files to a USB hard drive? If it helps, the laptop is able to see the USB drive when choosing a boot order. Some searching lead me to WinPE 3.0, part of the Windows Automated Install Kit. Is that a method?

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• Printer on different network(IP range), can i print to it?

  - by John

  Heres my situation, client PC is on the same network as the printer to start with: 192.168.1.X Thats fine and printing is fine, however our clients are required to connect to the VPN using the installed cisco client - this creates a virtual adapter and now the PC is connected to a 10.0.0.X IP range and can no longer see the printer, thus my problem! If I do an IPCONFIG/ALL the PC still has the 192.168.1.X address but it I can't ping anything on it. Is it possible to use both IP ranges at the same time?

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• Why can I browse to localhost, not to my computer name? (IIS7) [closed]

  - by Lost Hobbit

  I'm not very clued up on IIS, but I'm trying to do something that I thought would be quite simple. In IE, if I browse to http://localhost:80, I am greeted with a pretty picture with a bunch of welcome messages and a big "IIS7", thanks to the graphic designers at Microsoft. In IE, if I browse to http://mycomputername:80, I'm greeted with 404. It may be my fault... perhaps I've done something weird. Chrome replies 404 to either of those. Should this work, and if so, what am I doing wrong, or what can I do to get it to work? What might cause this to happen and how can I fix it? EDIT To add a bit more information. I did find after posting this question that http://localhost:80 was the only URL I could access on my local PC. I could not access any of the virtual sub-directories on localhost via my browser.

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• permanently mount multiple directories from different disks under root [on hold]

  - by piotrek

  I have SSD and HDD. Some directories like /var /srv /tmp should be on hdd while /boot /usr /lib on ssd. But do I have to create separate partition for every single directory? i want to have 2 or so partitions. one for each disk and distribute directories as needed. is it possible? and how? i've heard about symlinks, mount --bind, mhddfs but: symlinks are treated differently by tools like cp so i'm not sure if it's safe to have main system directories symlinked i have no idea how can I use mount --bind or mhddfs in fstab

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• Computer doesn't start at all

  - by Sniffer

  I have a desktop computer that won't start at all, I had it for years, and now suddenly when I press the power button I get no beeps, no fans spinning, no hard disk spinning. And the amazing thing that it sometimes works when I press the power button and every thing works normally. Sometimes it works after an hour, 10 hours or 10 minutes after I press the power button and this problem happens when electricity goes out and comes back. If I managed to turn the computer and no power outage happened. I am able to keep turning it on. But when the electricity goes off and on. And I press the power button it may turn on after an hour, two, 10 or not at all.

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• Crunchbang asks for URIs to get build dependencies for php5 [closed]

  - by Koen027

  I'm trying to install PHP5, by compiling it myself. I'm doing this on Crunchbang Linux, version 11. Specifically, the version using the 3.2 kernel. Crunchbang 11 is based on Debian. This is a 64-bit Virtual machine, running on a 64-bit Win7 Professional. Using Virtualbox 4.2 This is my sources.list file: http://pastebin.com/rQJNwX7c When I try to do sudo apt-get build-dep php5, I get the following output: Reading package lists... Done Building dependency tree Reading state information... Done E: You must put some 'source' URIs in your sources.list I'm not sure what's going on here. Can anyone point out what's missing in my setup? Also, since I'm under 300 reputation on serverfault, I can't add the "crunchbang" tag.

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• (core dumped) ${TOMCAT_START}?

  - by Farticle Pilter

  I am running COMSOL (a scientific software) as a server, to which MATLAB is connected to. After a while, COMSOL aborted with the following error message. [s@beads ~]$ comsol server -comsolinifile $HOME/comsolini/comsolbatch.ini Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. [s@beads ~]$ comsol server -comsolinifile $HOME/comsolini/comsolserver.ini COMSOL 4.4 (Build: 150) started listening on port 2036 Use the console command 'close' to exit the program A client with username 's' has logged on to the server from 'beads.myuniversity.edu' using port 2036. /software/linux/x86_64/comsol-4.4/bin/comsol: line 1436: 32757 Aborted (core dumped) ${TOMCAT_START} What might be the cause of this (core dumped) ${TOMCAT_START}? How may I fix it?

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• vSphere 4 - how can I cancel a file copy in progress?

  - by DrStalker

  VMware vSphere 4 SAN storage with multiple data-stores No vCenter I shut-down a virtual machine and using the data-store browser did a copy/paste to copy the VM to a new datastore with additional space. The file copy performance was very poor, and due to time constraints I decided to cancel the copy task. However the copy task showing in the vsphere client can not be cancelled; the cancel option is disabled. Currently I am not able to start the machine in it's original location as the disk files are locked for the copy. How can I abort the copy? I tried deleting the target directory but this did not abort the copy task.

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• Citrix on ESX 4 U1 - Slow login times

  - by thomps01

  I'm sure they'd be just as slow if not slower using ESX 3 but I'm looking for some assistance. On a physical Citrix server, logins are 1 - 4 seconds. The virtual - 16 - 23 seconds. I'm looking for performance enhancements that I can make to me VMs to try and reduce the login wait times. The hardware is fine (HP BL685 (24 cores, 64GB RAM). And there's nothing pushing it yet. Network 10Gb I'm planning to test the configuration with VMXNET3 tomorrow, but does anyone have a list a best practices I can use when testing?

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