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The JFR Recording WLDF_Debug_Events Should Start with Bounds on Size (Doc ID 2721979.1)

Last updated on OCTOBER 26, 2020

Applies to:

Oracle WebLogic Server - Version 12.2.1.3.0 and later
Information in this document applies to any platform.

Symptoms

There are issues with the filesystem occupation when, (with no apparent explanation) "WLDF_debug_events" recording is launched in one of the WebLogic instances.


WebLogic server is started with some JFR parameteres to activate default recording: -XX:+UnlockCommercialFeatures -XX:+FlightRecorder -XX:HeapDumpPath=/srv/log/core -XX:+HeapDumpOnOutOfMemoryError -XX:FlightRecorderOptions=defaultrecording=true,repository=xxx,maxage=1h,disk=true,dumponexit=true,dumponexitpath=xxx


Doc ID 2647815.1 which points to the WLS flag "DebugDiagnosticDataGathering", if it is activated the recording named "__WLDF_debug_events" starts generating JFR files.

Changes

 WLS debug flag "DebugDiagnosticDataGathering" was automatically enabled and provoked the recording named "WLDF_debug_events" to generating JFR files, causing performance issues.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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