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Meaning of EPOLL_CTL_DEL error in logs

Alexandre 2017-10-16 16:27:13 UTC in Nimble Streamer
1e44d7b82b4c7cf10ff758ec46717ef6

Hi,

I'm diagnosing a performance impact on some of our nimble streamers and have multiple lines similar to these ones in the logs :

[2017-10-16 11:59:12 P5690-T5692] [work1] E: invalid fd=127 event=4 received from selector
[2017-10-16 11:59:12 P5690-T5692] [work1] E: epoll_ctl epfd=9 EPOLL_CTL_DEL failed for fd=127 (errno=1)
[2017-10-16 12:02:36 P5690-T5692] [work1] E: invalid fd=54 event=4 received from selector
[2017-10-16 12:02:36 P5690-T5692] [work1] E: epoll_ctl epfd=9 EPOLL_CTL_DEL failed for fd=54 (errno=1)

Can somebody help me figure out what they mean?

Alex Pokotilo 2017-10-16 22:26:59 UTC
B0af1cee7eb1e40dd284d9982b3aef70

Sometimes on high/middle or even low load linux kernel have several event for given socket in the epoll queue. If Nimble removes socket from processing and after that new even from queue is received you will get such messages. Just ignore them

Alexandre 2017-10-21 22:40:20 UTC
1e44d7b82b4c7cf10ff758ec46717ef6

OK, Thank you:)

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