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  • Hadoop:Only master node does the work

    - by user287722
    I've setup a Hadoop 2.2 cluster with 1 master node(namenode and secondary namenode) and 3 slave nodes(datanode and namenode on each one).All of the machines use Linux Mint 64bit. When I run my MapReduce program, writen in Java, I can only see that master node is using extra CPU and RAM. Slave nodes are not doing a thing. I've checked the logs from all of the namenodes and there is nothing wrong with the namenodes on slave nodes. Resource Manager is running and all of the slave nodes can see the Resource Manager. I used this http://n0where.net/hadoop-2-2-multi-node-cluster-setup/ tutorial to configure my nodes. Datanodes are working in terms of distributed data storing but I can't see any indication of distributed data processing. Do I have to configure the xml configuration files in some other way so all of the machines will process data while I'm running my MapReduce Job?

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  • GRUB's menu.lst deleted after a kernel update

    - by the_drow
    I have installed ubuntu through wubi and all was well until I updated to the next kernel version. I am now trying to boot into ubuntu and it shows me the GRUB rescue command line. I am able to boost windows and the problem seems to be related to the fact that I have no menu.lst on ubuntu\disks\boot\grub and also it might be related to the fact that wubi wasn't installed to the drive where windows is installed but I am not sure. How do I recover menu.lst? Does the problem lay somewhere else? Is there a way to read the data with a windows tool to just recover my data?

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  • Is it dangerous for me to give some of my Model classes Control-like methods?

    - by Pureferret
    In my personal project I have tried to stick to MVC, but I've also been made aware that sticking to MVC too tightly can be a bad thing as it makes writing awkward and forces the flow of the program in odd ways (i.e. some simple functions can be performed by something that normally wouldn't, and avoid MVC related overheads). So I'm beginning to feel justified in this compromise: I have some 'manager programs' that 'own' data and have some way to manipulate it, as such I think they'd count as both part of the model, and part of the control, and to me this feels more natural than keepingthem separate. For instance: One of my Managers is the PlayerCharacterManager that has these methods: void buySkill(PlayerCharacter playerCharacter, Skill skill); void changeName(); void changeRole(); void restatCharacter(); void addCharacterToGame(); void createNewCharacter(); PlayerCharacter getPlayerCharacter(); List<PlayerCharacter> getPlayersCharacter(Player player); List<PlayerCharacter> getAllCharacters(); I hope the mothod names are transparent enough that they don't all need explaining. I've called it a manager because it will help manage all of the PlayerCharacter 'model' objects the code creates, and create and keep a map of these. I may also get it to store other information in the future. I plan to have another two similar classes for this sort of control, but I will orchestrate when and how this happens, and what to do with the returned data via a pure controller class. This splitting up control between informed managers and the controller, as opposed to operating just through a controller seems like it will simplify my code and make it flow more. My question is, is this a dangerous choice, in terms of making the code harder to follow/test/fix? Is this somethign established as good or bad or neutral? I oculdn't find anything similar except the idea of Actors but that's not quite why I'm trying to do. Edit: Perhaps an example is needed; I'm using the Controller to update the view and access the data, so when I click the 'Add new character to a player button' it'll call methods in the controller that then go and tell the PlayerCharacterManager class to create a new character instance, it'll call the PlayerManager class to add that new character to the player-character map, and then it'll add this information to the database, and tell the view to update any GUIs effected. That is the sort of 'control sequence' I'm hoping to create with these manager classes.

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  • Somebody please help me, desperate... please

    - by Beast
    I followed a friend's advice and am using Ubuntu, and was enjoying it. I began to get system errors, tried to fix to no avail. It won't let me download anything to Ubuntu, saying unauthorized or untrusted software, or something. NOW MY CD DRIVE doesn't work! So I can't boot dban or anything via cd. Finally I bought a usb stick but it won't boot dban or anything. I'm about to just smash this with a hammer. Help me start over.

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  • "An upgrade from 'precise' to 'oneiric' is not unsupported with this tool" error while upgrading

    - by tas
    A brief electrical outage interrupted my 12.04 upgrade. After many tries, which included trying to upgrade from a command line, I was able to access Ubuntu screens again. I find that the 12.04 upgrade was indeed not completed; I am still running 11.10. However, Update Manager does not give me the option of installing 12.o4 now. And, when I run Update Manager, I am asked if I want to execute a "partial install." When I answer "yes," I receive the message above. Besides a clean install, any ideas about what can I do to upgrade to 12.4?

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  • Pillar Axiom OpenWorld Highlights

    - by uwes
    During the Storage General Session at Oracle OpenWorld Conference 2012 in San Francisco, the following Axiom-related announcements were made: Oracle Platinum Services for Axiom 600: Extending Oracle's Platinum Services to Axiom 600 as a standalone product –  the same level of service and support you get with Exadata – 24/7 fault monitoring, dedicated response and escalation management to meet enterprise-grade SLA’s, patch planning and management. Oracle Enterprise Manager Axiom Plug-in: Allowing DBA's to manage, maintain, monitor and provision the Axiom 600 storage system from Oracle EM. Oracle Virtual Machine Axiom Plug-in: Allowing Oracle VM and System Administrators to manage, maintain, monitor and provision the Axiom 600 storage system from Oracle VM using Storage Connect. Oracle Axiom Data Protection Manager 3.1: Leveraging Axiom's Copy Services, System Administrators can automatically create Application Consistent Clones of critical Windows and Oracle DataBase environments for quick recovery. For More Information Go To: Oracle.com Pillar Axiom Page Oracle Technology Network SAN Page

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  • 12.04 freezes on install

    - by CHris
    I'm new to ubuntu and can't for the life of me understand how to get around this issue. I'm having a problem where when I insert the boot disk that i burned for 12.04, it loads and gives me the language option and select an installation type, i select either try ubuntu / install ubuntu and it begins to load. Then after about 5 mintues of the purple screen with the dots under the UBUNTU it freezes the whole computer, and the only way to get out is to turn off the laptop with the power button. I have read previous threads saying people had similar "freezing" issues including ones that mention my model of laptop, HP Pavillion DV1000. But it appears their problems are post installation and relate to their wireless cards. I have tried changing the boot options (F6) and I am totally stuck. Can anyone shed any light on to this issue? Thanks in advance.........

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  • Asus Machine fails to start due to missing msvcr.dll - what?

    - by Malcolm Anderson
    So first off a thanks to the internet, knoppix and a post over at http://www.overclock.net/windows/879553-msvcr80-dll-missing-catastrophic-failure.html   My Symptoms: my laptop would not boot.  Would not let me get anywhere.  Just like the symptoms in the post.   Thankfully, all I had to do was go rename my avg directory and all was good.  But I needed something to boot from and I knew and trusted Knoppix from my past linux experimental days.    If it wasn't for Knoppix, I would have probably reformatted my machine and I didn't want that.

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  • Changing Wallpaper on 12.04 Login Screen

    - by userIsAMonkey
    I'm using this link but seems to be not working on 12.04, here's the Terminal message below: Are there other softwares/tips for changing the login screen? I'm also using link but seems outdated. Failed to fetch http://ppa.launchpad.net/claudiocn/slm/ubuntu/dists/precise/main/source/Sources 404 Not Found W: Failed to fetch http://ppa.launchpad.net/claudiocn/slm/ubuntu/dists/precise/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/claudiocn/slm/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. law@ubuntu:~$ sudo apt-get install simple-lightdm-manager Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package simple-lightdm-manager

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  • Setting Default Ubuntu eth port

    - by No1_Melman
    Background: I have a desktop computer running Ubuntu 12.04. I have installed DRBL to handle DHCP server and Clonezilla Server. I have a network card in my desktop with 2 ports in it. These 2 ports are bonded together and are used by DRBL. There is a 3rd port integrated in the motherboard. I want to use this 3rd port for internet. DRBL knows that this is set for internet. Ubuntu Network-Manager has stopped recognising the connections (device not managed). It use to say that eth1 was default (first port in the network card) I want eth0 to be default as that is the Internet port. Question: How do I make network-manager see eth0 as the defualt port?

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  • How do I restore GRUB 2?

    - by uahug
    I upgraded my laptop with an SSD, moving my old HDD to where the DVD-drive was, so that I could have speed and storage. Now, I have reinstalled Ubuntu on the SSD, deleting all the partitions on the old HDD to make space for a data partition. But now the laptop doesn't even get to GRUB 2 if the HDD is plugged in! If I take it out, everything works, but as soon as I plug it in and retry to boot, I won't find GRUB. At first, I thought it was because of the boot order, but the order was OK: first the notebook hard drive (SSD) and then the CD/DVD drive (which in reality is the HDD). How can I fix it? Doing a simple grub-install /dev/sda doesn't work.. The SSD is sda, and the HDD is sdb.

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  • Connected to Access Point but no internet connection?

    - by ReaZem
    I am trying to use my school's WPA Enterprise network to access the internet with my Three-OS laptop. I currently have Windows7, Ubuntu11.10 and Backtrack5 installed. I can use my home's WPA2 network without any issues with the 3 OS. I can successfully connect to my school's network with the 3 OS but I can only browse the internet with windows7. Ubuntu network-manager and Backtrack WICD both say that I am connected to the Acces Point but I cannot browse the internet. I have tried uninstalling network-manager and installing WICD but it did not solve the problem. Every time I connect to the Access Point, I am able to browse the internet for about 10 seconds. I have tried disabling IPV6 I have tried changing DNS.

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  • A Single wireless network is not showing up in Ubuntu that used too, and other devices have no issue finding or connecting to it

    - by Kit Sunde
    Up until about a week ago I could connect to my wireless, but now I suddenly can't. Every other wireless in the area show up in the network manager. My kindle can connect to it, my friend can connect to it (in windows) without having connected to it before. My other netbook (Samsung NC10) can connect to it, but my other Samsung N150 now cannot even see it. I have tried deleting the old auto entry for it in the network manager Tried disabling and enabling both the networking and the wireless through the network indicator. Disabled the networking through the hardware shortkut key thing [fn] + [F9] Attempting to connect to it as if it was a hidden network. I'm at a loss, how would I go about debugging and unborking my computer?

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  • DualBoot 32Win & 64Mac from Live USB +Persistance

    - by josephsmendoza
    So I have a 32 bit Live USB with persistance that I use to write code, cause that's just how I roll. I can boot it onto my school computers(32 bit Win) no problem, but obviously not my Mac (2007 iMac, 64 Bit). Currently I use VMWare Fusion 6 Pro and a Plop Linux image to use the usb at home, but I can only get 900mb of ram for my VM. I was hoping to make a Live USB that can boot 32 bit and 64 bit for mac, with a shared persistance file, this way I can use my computer's full 2GB. Also, I'm not allowed edit any part of this Mac. Do Not reply telling me it's impossible. Please only solutions. Thank you, and have a unicorntastic day!

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  • Windows not closing

    - by bhanu
    After login, a number of windows such as Desktop, Downloads, and Pictures opens automatically. When I try to close them one by one closes itself but last one opens all indicating starting file manager in lower panel/status bar. After login all the windows such as desktop,download,home opens automatically when i try to minimise them all minimise. when i try to close them one after another they disappears but not last one which closes itself and reappear along with other indicating message starting file manager in status bar. ( it seems that there are a number of open nautilus windows at startup upon login, and when the user tries to close them, nautilus crashes and tries to restart)

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  • Ubuntu 11.10 not showing up in GRUB bootloader after update and restart :(

    - by beginer
    I was using ubuntu 11.10 with gnome-shell. I installed various useful softwares and ran system update using update manager which ran smoothly and asked me to restart my comp at the end. I restarted it to find that Ubuntu entries were missing from the GRUB bootloader and only memory test and windows are showing up. I took a lot of pain in installing various important softwares and cannot afford a re-installation. Tried to boot from the live cd and installed boot-repair and after running it .. it wasnt working properly .. it was just showing that it was "scanning systems" for more than an hour. Kindly help. Thank you ..

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  • Blank desktop after updates today, only unity2d works now [closed]

    - by NewUbuntuUser
    Possible Duplicate: Unity doesn't load, no Launcher, no Dash appears I have been using 12.04 (wubi) since a week now and this is my 1st exposure to linux. Everything was going on fine till now , but today as soon as I updated through the update manager , docky gave a message that compositing is required or something, and i got an error window which asked me to report the error and then the update manager asked me to reboot. After rebooting , i just get a blank desktop screen , no launcher, no toolbar. I have to restart with the power key. However if i login through Unity 2d everything is fine except the benefits of the 3d environment. I guess something got messed up after the update and i cant figure out which program or file caused this mess. I would highly appreciate if someone could help me out with this as I really liked working on ubuntu after windows 7. Thanks! SOLVED-- Thanks @jrg for the link provided.. it helped me to come out of this mess. Actually some update of compizconfig made the unity plugin inactive did something to the Animation add ons , the one which you use for the burn effect etc. What i did was : On the blank desktop Pressed keys Ctrl + Alt + T to bring up the terminal and typed ccsm This brought up the compiz config system manager, there i enabled the unity plugin and rebooted. Everything started working fine. But then again when i started the addons plugin ,everything went back to square one.. :( . This time pressing Ctrl + Alt + T also did not help. Then i tried Ctrl + Alt + F1 , it brought up a terminal or whatever u call it, and then i typed unity --reset , it did some resetting and in the end it showed some comositing done , I pressed Ctrl + Alt + F7 to come back to the desktop , and here it was , my old sweet desktop.. it had the animation effects too like wobbly windows, excepting the addons like the burn effect, i guess something got wrong with the last update of that addon plugin and now whenever i try turning that on , everything goes poof!! 6 hours wasted , but i guess i learnt something new.. not bad for an orthodontist i guess :))

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  • Ubuntu 12.04 Server monitor goes into sleep mode (no display) after fresh install

    - by xamox
    For some reason I can boot and either use Ubuntu 12.04 server edition, or desktop version. I can live boot the disk, I can go through the installer, or even use the ubuntu alternate installer. But for some reason after the install completes and I reboot the monitor seems to go back into sleep mode and then never loads the command prompt. This is on an industrial adlink MXE-1300 PC. I've installed ubuntu server fine on other models of adlink machines but this one doesn't want to seem to play nice. To me it seems like if it was a video card issue than I could never even load the installer or run ubuntu in live mode. Any thoughts or troubleshooting tips would be greatly appreciated.

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  • How do I upgrade from 9.04 to 10.04.2?

    - by Yadnesh
    I'm currently runing Ubuntu 9.04 Jaunty. I want to upgrade to 10.04.02, but whenever I use the Update manager to do this, it fails with the error "An upgrade from 'jaunty' to 'lucid' is not supported with this tool". I also tried to run sudo do-release-upgrade -d, but it fails with the same error message: Checking for a new ubuntu release Done Upgrade tool signature Done Upgrade tool Done downloading extracting 'lucid.tar.gz' authenticate 'lucid.tar.gz' against 'lucid.tar.gz.gpg' tar: Removing leading `/' from member names Reading cache Checking package manager Can not upgrade An upgrade from 'jaunty' to 'lucid' is not supported with this tool.

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  • 13.10 Desktop - Stop Suspension on Lid Closure

    - by bpmitche
    I'm having a problem with power management settings on my ASUS K52-F Laptop. Upgraded from 13.04 to 13.10 earlier today; closing the laptop lid puts the laptop into suspension (even on AC Power - tried fixing it in gnome power settings, tried fixing it in Cinnamon power settings, tried changing it in DCONF-Editor, but no matter where I change the setting the laptop lid still suspends). After resuming from suspend, I restore to the gnome window/login manager (instead of Cinnamon login manager). Wifi doesn't reconnect, but the icon in Cinnamon shows that I'm connected. IFCONFIG shows that the interface is up and working normally, but still not reconnecting. ifconfig wlan0 down / up doesn't change anything. Any help would be greatly appreciated.

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  • Wrong EFI System Partition GUID?

    - by artificer
    On a new GPT initialized disk (second PC disk) I created a FAT32 partition using gparted. I want to use it as an EFI System Partition so I flagged it as boot. After that I checked the UUID using the gparted “partition information” option and it reported: 09B1-97A5. As far as I understand it should be C12A7328-F81F-11D2-BA4B-00A0C93EC93B. I also checked my running operative system disk (Ubuntu 14) and found that Gparted reports EB78-9AD2 for my actual boot partition UUID. What exactly is gparted reporting as UUID on my EFI system partition and why it doesn’t match with the expected C12A7328-F81F-11D2-BA4B-00A0C93EC93B ID?

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  • Ubuntu installation time problem

    - by hellodear
    I am installing Ubuntu and I am stuck at a point. The step is when it is asking me to select partition. It is showing me error: "No file system is defined Please correct this from partitioning menu". I am getting this error when I am clicking "Install". I want Ubuntu to install in /dev/sda7 which is 226727 Mb. I have Windows 8 in my system and I want to dual boot the system. So how to correct this error? I want to allocate this whole partition to Ubuntu only. Secondly, What should I put in the option: "Device for boot loader installation"? By default it is somewhat like this: "ATA WDC WD5000..." something like this. Please tell my both these questions. I would be very thankful to you. Thanks.

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  • Changing OS from Windows to Ubuntu

    - by Shadowinnothing
    So my computer has 2 operating systems on it, Windows 7 and Ubuntu 12.04. When I downloaded Ubuntu i had a ton of trouble booting windows 7 up again, then I downloaded GRUB and switched my default OS back to Windows. Sadly though, I'm trying to get into writing php with Apache. I Downloaded WAMP (windows Apache MySQL php) but for some reason, php doesn't work. I though i would try downloading LAMP (Linux apace MySQL php) but whenever I boot up my PC, I don't get a chance to enter the Ubuntu OS. How could I get back to running Ubuntu? Actually, it doesn't prompt me for a boot menu or anything. It just goes straight to the windows symbol

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  • Machine check error on ASUS while booting from USB

    - by user100453
    I put the last Ubuntu iso on my USB stick using UNetBootin, after formatting it to fat32. I've already done that before with other operating systems and it worked. I can't actually boot Ubuntu from USB since I get a black screen with the error "Machine check error" on top the an automatic reboot happens. The error appears right after the boot, I can't see anything else before. I'm using my ASUS X54L latop. Does anybody know how to solve this? Installation from CD/DVD works.

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