WebLogic File Descriptor Leak When Using NIOSocketMuxer
Last updated on MAY 10, 2017
Applies to:Oracle WebLogic Server - Version 188.8.131.52.0 to 184.108.40.206.0 [Release 12c]
Information in this document applies to any platform.
On WLS 220.127.116.11, where upper stack products as OSB or Exalogic are present which uses the NIOSocketMuxer by default - a critical system availability issue is seen and the number of file descriptors kept increasing.
As a troubleshooting step, to check if issue is located in the muxers, if we switch to the posix muxer by adding the parameter -Dweblogic.MuxerClass=weblogic.socket.PosixSocketMuxer
to the WebLogic managed servers, the issue with increase in file descriptors count appeared to stop.
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