Hi,
did you manage to get some information from the xrootd.log?
On our side, we are experiencing thread saturation with no traffic more than once per day, and every time a restart of the service in each of the 4 servers is needed to resume traffic.

It is pretty hard to believe some outstanding activity is undergoing this often somewhere in the CMS filesystem and completely hiding from our monitoring: we see no blocking, no pending operations, nothing weird gpfs-side.

In case it is useful, we attach a file containing the output of "netstat -an" during thread saturation in one of the server.

Let us know how we can debug further.

Thanks for your help,
lucia
netstat_an.txt

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