[Bug 968021] Re: boinc stops on error after a few days (md5_file: Too many open files) in stderrdae.txt

[Clint Byrum]

** Description changed:

+ == SRU Justification ==
+ 
+ Impact : when opened (oneiric), the bug was/is as described: a long time running boinc system would finally fails to compute more boinc work unit as every computed work unit leads to a leak of 1 file descriptor in the boinc main daemon (irrelevant of the kind of project subscribed). The faster the work units were processed, and the lower the limit of file descriptor in the system, the faster the bug happens (usually within one week of uninterrupted uptime, but might go to months on slower systems).
+ This bug affects all users from Oneiric (boinc 6.12.33+dfsg-1.1ubuntu0.1) to 7.0.27 (excluded, that one is fine).
+ (well, 7.0.23, 7.0.24 & 7.0.25 have another issue: computation error, no more leak; 7.0.26 not tested)
+ 
+ Test case: easy, but very long: run boinc for at least one complete work
+ unit (according to project, the unit can be 5 minutes to many hours),
+ then use "lsof" on the boinc daemon and check the end of the listing.
+ When more units have been processed, the list reported by "lsof" should
+ not be longer than before. Computation of each unit must succeed.
+ 
+ Regression Potential: I do not know the change, I cannot discuss the
+ impact. But boinc must be able to run unattended for months without such
+ problem, and without reboot, especially on a LTS.
+ 
+ == Original Description ==
+ 
  There seems to be a file descriptor leaks in the boinc process (client
  side).
  
  After a few days of fine loading the system, it would suddenly stop
  working.
  
  Relaunching it is usually ok (but actively managing a system running
  boinc is rather not a decent solution).
  
  Clue with the following command:
  
  $ sudo lsof -p `pidof boinc`
  
  The number of open file descriptor will keep increasing as boinc tasks
  are completed. (more visible when the projects have fast tasks for the
  hardware, such as sudoku or milkyway/nvidia)
  
  A lot of entries are like:
  
  boinc   15348 boinc  623r   DIR     8,1     4096   29492116 /var/lib/boinc-client/slots/12
  boinc   15348 boinc  624r   DIR     8,1     4096   29492173 /var/lib/boinc-client/slots/13
  boinc   15348 boinc  625r   DIR     8,1     4096   29492116 /var/lib/boinc-client/slots/12
  boinc   15348 boinc  626r   DIR     8,1     4096   29492084 /var/lib/boinc-client/slots/8
  boinc   15348 boinc  627r   DIR     8,1     4096   29492085 /var/lib/boinc-client/slots/9
  boinc   15348 boinc  628r   DIR     8,1     4096   29492116 /var/lib/boinc-client/slots/12
  boinc   15348 boinc  629r   DIR     8,1     4096   29492173 /var/lib/boinc-client/slots/13
  boinc   15348 boinc  630r   DIR     8,1     4096   29492116 /var/lib/boinc-client/slots/12
  boinc   15348 boinc  632r   DIR     8,1     4096   29492018 /var/lib/boinc-client/slots/2
  boinc   15348 boinc  633r   DIR     8,1     4096   29492040 /var/lib/boinc-client/slots/4
  boinc   15348 boinc  634r   DIR     8,1     4096   29492018 /var/lib/boinc-client/slots/2
  boinc   15348 boinc  635r   DIR     8,1     4096   29492062 /var/lib/boinc-client/slots/6
  boinc   15348 boinc  636r   DIR     8,1     4096   29492116 /var/lib/boinc-client/slots/12
  
  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: boinc 6.12.33+dfsg-1.1ubuntu0.1
  ProcVersionSignature: Ubuntu 3.0.0-17.30-generic 3.0.22
  Uname: Linux 3.0.0-17-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Thu Mar 29 08:59:09 2012
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  PackageArchitecture: all
  SourcePackage: boinc
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/968021

Title:
  boinc stops on error after a few days (md5_file: Too many open files)
  in stderrdae.txt

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