What Matevz says is completely correct. However, even after exhausting file descriptors, xrootd should neither crash nor give bad data. So, at least for the crash could we get a traceback or (hoping for the impossible) access to the core file.<br>
<br>
<br>
<br>
From: Matevž Tadel <br>
Sent: Tuesday, May 07, 2019 10:29 AM<br>
To: xrootd/xrootd <br>
Cc: Subscribed <br>
Subject: Re: [xrootd/xrootd] Rising number of open files in xcache (#975)<br>
<br>
Hi Nikolai,<br>
<br>
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 &quot;leak&quot; it. We are working on a proper fix but in the meantime, please use:<br>
pss.ciosync 60 900<br>
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.<br>
<br>
See:<br>
http://xrootd.org/doc/dev49/pss_config.htm#_Toc525070685<br>
<br>
Cheers,<br>
Matevz<br>
<br>
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