Weblogic Server 12.1.1 Becomes Unresponsive with High CPU When a Huge HTTP GET Request is Sent Over SSL (Doc ID 1640312.1)

Last updated on NOVEMBER 05, 2016

Applies to:

Oracle WebLogic Server - Version 12.1.1.0 to 12.1.1.0 [Release 12c]
Information in this document applies to any platform.

Symptoms

 

In WebLogic Server 12.1.1, when we are trying to send a very large data packet (2-4 times the "max. message size") over HTTP GET, using a SSL client, we can observe persistent high CPU, leading to system instability and service unavailability. On checking the top output and then validating the same with thread dump we can observe the following thread being the culprit:

We could observe this behavior with other muxer at the same time.

Cause

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