Strange. I took care to avoid just this kind of deadlock. I will have a
look.
Lukasz
PS. for the future, please report these as issues on github.
On 13.02.2014 07:09, Alja Mrak-Tadel wrote:
> Hi,
>
> I'm running proxy server from the master branch and I consistently get a
> dead lock after running jobs more than 15 min, e.g.,
> http://uaf-2.t2.ucsd.edu/~alja/traffic.png
>
> The lock seems to be related to removing sockets in the client after
> elapsing the XRD_DATASERVERTTL of the proxy. This is what I inferred
> from debugging proxy with gdb (I picked a locked up thread and followed
> the owners of contended locks):
>
> https://gist.github.com/alja/2e6a69c48f864cccf1d9#file-xrdcl-pollerbuiltin-removesocket-bt-txt-L12
> and server debug messages http://uaf-2.t2.ucsd.edu/~alja/proxy-lock.log
> If I set the TTL high enough the proxy server can be 100% efficient and
> stable.
>
> The lock is not simple to reproduce -- I'm running 600 jobs with 10%
> probability of replicated file paths. The gcore after lock-up is in
> noric38.slac.stanford.edu:/usr/work/matevz/gcore.12905
>
> Thanks,
> Alya
>
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