[Mauiusers] maui-3.2.6p14-snap.1121876607 memory leak andsegmentation fault (valgrind logs attached)

David B Jackson jacksond at clusterresources.com
Wed Aug 3 22:25:35 MDT 2005


Chris,

  Excellent!  Thanks for the help!  I believe we can have these corrected
tomorrow.

Dave

> Hi folks,
>
> I'm involved with helping an organisation set up a cluster using Maui, and
> they're having real problems with memory leaks in Maui, to the extent that
> it
> took out their 2.5GB RAM RHEL3 management node by running out of memory
> and
> causing it to do the usual 2.4 OOM killer deadlock.
>
> When I arrived yesterday Maui was up to 700MB resident size. :-(
>
> I tried to upgrade them to the latest snapshot, but (a) that's still got
> leaks
> according to valgrind and (b) it now appears to SEGV if you're pushing a
> reasonable rate of jobs through it (they've got some application that
> generates a pipeline of a couple of hundred of 1-10 minute jobs).
>
> Whilst I was there I only had the time to use Valgrind on Maui to track
> this
> down, but it does appear to give a good backtrace and diagnosis of why
> it's
> SEGV'ing, along with memory leak information.
>
> This crash also occurs when Maui is running without valgrind in its usual
> daemon mode.
>
> I've attached 3 log files, one with the crash (when they were pushing lots
> of
> jobs through to test it), and then two with successful short runs of 1 and
> 0
> jobs, each of which also claim there are leaks happening.
>
> Hope this helps!
>
> cheers,
> Chris
> --
>  Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
>  Victorian Partnership for Advanced Computing http://www.vpac.org/
>  Bldg 91, 110 Victoria Street, Carlton South, VIC 3053, Australia
>
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