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WebLogic Server going to UNKNOWN state when starting JRA recording with NoClassDefFoundError exception (Doc ID 1104935.1)

Last updated on OCTOBER 10, 2018

Applies to:

Oracle JRockit - Version: R27.5 to R27.6 - Release: JRockit to JRockit
Information in this document applies to any platform.
This document is applicable for all versions of JRockit JDK release versions starting from R27.5 in the R27.x release on all supported platforms.


Issue of WebLogic server going to UNKNOWN state from console and not responding was reported when starting JRA recording.

Below are NoClassDefFoundError exceptions found in weblogic server logs at the time of issue.

Exception in thread "[ACTIVE] ExecuteThread: '141' for queue: 'weblogic.kernel.Default (self-tuning)'" java/lang/IllegalMonitorStateException: (m=jrockit.vm.ObjectMonitor@60a8186) Failed to get monitor for (tIdx=16c)
at jrockit/vm/Reflect.fillInStackTrace0(Ljava/lang/Throwable;)V(Native Method)
at java/lang/Throwable.fillInStackTraceException in thread "[ACTIVE] ExecuteThread: '273' for queue: 'weblogic.kernel.Default (self-tuning)'" (
java/lang/NoClassDefFoundError: com/bea/jrockit/latency/impl/EventImpl
at com/bea/jrockit/latency/impl/EventProducerImpl.createEvent(
at jrockit/io/FileNativeIO.createLatencyEvent(
at jrockit/io/FileNativeIO.writeBytes(
at java/io/FileOutputStream.writeBytes([BII)V(
at java/io/FileOutputStream.write(
at java/io/BufferedOutputStream.flushBuffer(
at java/io/BufferedOutputStream.write(
at java/io/PrintStream.write(


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