| Index | Recent Threads | Unanswered Threads | Who's Active | Guidelines | Search |
 |
World Community Grid Forums
Category: Support
Forum: BOINC Agent Support
Thread: Computation errors on Ubuntu 11.10 [RESOLVED] |
| No member browsing this thread |
|
Thread Status: Active Total posts in this thread: 9
|
|
| Author |
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hi all,
----------------------------------------since roughly two weeks I only get "Computation error" for any task that BOINC tries to run for WCG. The "Task overview" tab shows an elapsed time of 1-2sec for each task, jumps to 100% progress and says "Computation error" in the status column. I already re-installed BOINC, removed the project and connected it again, discarded all tasks, installed BOINC from the WCG website instead of the one that comes with Ubuntu. Nothing of that helped. Any ideas what might cause this and how I could resolve it? Many thanks in advance! [Edit 1 times, last edit by Former Member at Oct 5, 2012 11:18:25 AM] |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hi Kernelpanic,
----------------------------------------Not much to go on but for the "1-2sec". Could be missing 32 bit libraries, but has anything changed to your Ubuntu 11.10... the let us guess, version upgrade or anything? Please copy/paste: 1) a portion of the client message log where fails [incl. the before and after] 2) the startup messages from BOINC message log [35 lines or so, to include where computation is attempted and fails] 3) a Status log from the Result Status page [click on the error link]. That will give us more clues what to investigate next. Edit: Tell us which sciences are failing. If the project folder got corrupted, a possible, do a WCG reset in the BOINC Manager which re-downloads most permanent science application files. [Edit 1 times, last edit by Former Member at Oct 3, 2012 10:09:25 AM] |
||
|
|
sgoll
Advanced Cruncher Joined: Oct 24, 2006 Post Count: 87 Status: Offline Project Badges: 
|
If there were not "ubuntu" i the header line I would say ... it sounds like an antivirus software. But without more information it is really hard to guess.
----------------------------------------Stephan  |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
If there were not "ubuntu" i the header line I would say ... it sounds like an antivirus software. Hi Stephan, This could be the cause. Around the time that this error happened first my company rolled out Symantec Antivirus also for Ubuntu users. I tried to disable it to see if that is the cause using sudo /etc/init.d/rtvscand stop(works fine) and sudo /etc/init.d/autoprotect stopThe last command gives me the following error: Stopping AP: Unloading symap as symap_custom_3.0.0_26_generic_pae_i686 Then I do # lsmod |grep symap and try to remove the module myself with the following command which gives me the same error as the script above: # sudo rmmod symap_custom_3.0.0_26_generic_pae_i686 Strangely the name of the module is cut at the first dot. How do I remove a module which name contians a dot (didn't find anything about that on the net). Next try is this which also fails: # sudo modprobe -r symap_custom_3.0.0_26_generic_pae_i686 Any idea how I can disable Symantec AV to test if it causes the error in WCG? Regards, Kernelpanic |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hi Kernelpanic,
So hmmm, there was a system impacting change ;>) And hmmm, assisting in disabling a company rolled out security measure we could not do... plain inappropriate. This would imply the company approved of running BOINC on company assets, in which case the IT department could help to set exclusions. I'm running ClamAV on Linux. It's always been unobtrusive, where I set, in kind of standard practice, a scan exclude for the BOINC data directory, which is in /var/lib/boinc-client if I remember correctly. That I done through a GUI interface. I can do what I want... it's my own hardware, and in the knowledge that Linux is infinitely more secure, and BOINC itself is well sandboxed, do not consider this excluding an unsave act... not on or Linux nor on Windows, but otherwise, the AV continues to run system-wide. |
||
|
|
sunfolk
Master Cruncher Super Kiwi Socialistic Empire Of Jacinda Joined: Oct 8, 2006 Post Count: 1769 Status: Offline Project Badges: 
|
How do I remove a module which name contians a dot (didn't find anything about that on the net). Well, I know that if you want to reference a file name in linux/unix that has spaces in it, then you just enclose it in quotation marks, like this: $ gedit "a file name with spaces in it .txt" Perhaps the same trick will work for names with periods/dots ? # sudo rmmod "symap_custom_3.0.0_26_generic_pae_i686" Cant help more than that, sorry & good luck...     [Edit 1 times, last edit by sunfolk at Oct 4, 2012 10:21:38 AM] |
||
|
|
sgoll
Advanced Cruncher Joined: Oct 24, 2006 Post Count: 87 Status: Offline Project Badges:
|
If there were not "ubuntu" i the header line I would say ... it sounds like an antivirus software. Hi Stephan, ........ # sudo modprobe -r symap_custom_3.0.0_26_generic_pae_i686 Any idea how I can disable Symantec AV to test if it causes the error in WCG? Regards, Kernelpanic Ah yes. The problem is caused by the symantec autoprotect kernel module. Take a look into /etc/init.d/autoprotect and this is the place where the kernel module is loaded. I don't know how to unload this module but when placing an exit 0 into this script this will prevent the module from loading at the next reboot. Caution: I don't know it the company security rules allow you to do this. May be you have to ask for permission to do so. Regards, Stephan |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hi all,
many thanks for your support. I *temporarily* disabled autoprotect just to find the cause of the error by inserting an exit statement at the beginning of the script. All WCG tasks in BOINC ran perfectly well. As soon as I removed the exit statement again, started autoprotect and rtvscand all WCG tasks switched to "computation error". Now that I verified the cause I will try to officially get support for BOINC by an company wide exception rule for Symantec AV to not interfere with BOINC. Our company is a big supporter of WCG - on Windows the BOINC client comes preinstalled with our desktop image AFAIK. Therefore I hope the Linux client team will modify the configuration of SAV accordingly. Regards, Kernelpanic |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Great. Will mark thread as [RESOLVED] in post title.
|
||
|
|
|