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Hi Nikolai,

Actually we just figured this one out with Andy ... this due to relatively short default timeout (180s) given to the cache to close a file after a client disconnect. When a system is busy, cache can not finish writing to the file in time and then xrootd layer decides to "leak" it. We are working on a proper fix but in the meantime, please use:
pss.ciosync 60 900
to increase the time given to the cache to close the file. The above line means try every 60s for a total of 900s -- this works for us at UCSD where we also had this problem.

See:
http://xrootd.org/doc/dev49/pss_config.htm#_Toc525070685

Cheers,
Matevz

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