Hi
On a related note, I am planning to upgrade from ARC 4.2 to ARC 5.0. Is there anything which I should be aware off? I have looked at the release note and it looks quite straight forward.
Thanks
Kashif
> -----Original Message-----
> From: Testbed Support for GridPP member institutes [mailto:TB-
> [log in to unmask]] On Behalf Of qing
> Sent: 26 June 2015 12:02
> To: [log in to unmask]
> Subject: Bug in /usr/share/arc/Condor.pm lead to ARC infoprovider crash
>
> Dear all:
>
> Some of you might notice that the BDII on Glasgow ARC-CEs sometimes
> disappeared, which is due to random crashes on ARC infoprovider.
>
> After discussing with the nordugrid ARC team,it's understood that ARC does
> not process some messages returned from condor quite well, thus makes
> the crash of infoprovider quite random.
>
> To fix this bug, a line in /usr/share/arc/Condor.pm needs to be modified.
> For ARC version 5.0.0 it's line 550, and for ARC version 4.2.0-1, it's line 545.
>
> $lrms_jobs{$id}{nodes} = "";
>
> needs to be changed to:
>
> $lrms_jobs{$id}{nodes} = [];
>
> If you see "Can't use an undefined value as an ARRAY reference at
> /usr/share/arc/ARC0mod.pm line 135." in infoprovider.log, it means you are
> affected. Our site is heavily affected by this bug, the infoprovider
> on our ARC-CEs crashes many times in a day. We applied this change
> yesterday morning and during the past 24 hours when site is fully loaded, the
> infoprovider hasn't crashed for a single time on any of the
> 4 ARC-CEs, this ensures me that the change fixed the bug. However,
> since such crash happens randomly so the situation maybe different
> between sites, I leave it to you to decide whether applying this bug fix or not.
>
> Cheers,Gang
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