WebLogic File Descriptor Leak When Using NIOSocketMuxer

(Doc ID 2260511.1)

Last updated on MAY 10, 2017

Applies to:

Oracle WebLogic Server - Version 12.1.3.0.0 to 12.2.1.1.0 [Release 12c]
Information in this document applies to any platform.

Symptoms

On WLS 12.2.1.1, 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.

Changes

 

Cause

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