Description
An IBM Java core file is a snapshot generated by the IBM JVM
as a result of:
- Severe events such as a
java.lang.OutOfMemoryError event.
- User signal (action)
sent to the JVM such as kill -3 <Java PID>.
Sample file
javacore.20130522.091935.14024730.0008.txt
NULL
------------------------------------------------------------------------
0SECTION TITLE subcomponent dump routine
NULL ===============================
1TISIGINFO Dump Event "systhrow" (00040000)
Detail "java/lang/OutOfMemoryError"
received
1TIDATETIME Date: 2013/05/22 at 09:25:36
1TIFILENAME Javacore filename: <App Folder>/javacore.20130522.091935.14024730.0008.txt
NULL
------------------------------------------------------------------------
0SECTION GPINFO subcomponent dump routine
NULL ================================
2XHOSLEVEL OS Level : AIX 6.1
2XHCPUS Processors -
3XHCPUARCH Architecture : ppc64
3XHNUMCPUS How Many : 12
Possible causes
……………………………………………………………………………………………
0SECTION THREADS subcomponent dump routine
NULL =================================
NULL
1XMCURTHDINFO Current Thread Details
NULL ----------------------
……………………………………………………………………………………………
0SECTION CLASSES subcomponent dump routine
NULL =================================
1CLTEXTCLLOS Classloader
summaries
……………………………………………………………………………………………
Data
content & purpose
- IBM JVM thread dump analysis (thread lock
contention, deadlock, thread chains, execution snapshot etc.)
- Class loader analysis (# instances, leak patterns
etc.).
- JVM runtime arguments review.
- Last GC activity history.
References
and Case Studies
