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@chrisburr : sorry for the delay, I finally had time to look at the problem. It seems to me that allowing the poller to fail more gracefully than just calling an `abort` should fix the problem: https://github.com/xrootd/xrootd/blob/250eced4d3787c2ac5be2c8c922134153bbf7f08/src/XrdSys/XrdSysIOEventsPollE.icc#L214-L223 That said, it puzzles me that you observed the same problem with GFAL2. GFAL2 is not doing any kind of file descriptor handling behind the scene (AFAIK). Now the `epoll_create1` is called with `EPOLL_CLOEXEC` but I don't thing the close-on-exec is subject to race conditions. Any thoughts? -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1198#issuecomment-856620030 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1