Closed as program error.
Error Message: JVMDUMP039I Processing dump event "systhrow", detail "java/lang/OutOfMemoryError" at 2012/04/01 23:28:40 - please wait. JVMDUMP032I JVM requested System dump using '/tmp/bld_106960/cmdLineTester_classesdbgddrext/106026550/core.2 0120401.232840.21717.0001.dmp' in response to an event JVMDUMP010I System dump written to /tmp/bld_106960/cmdLineTester_classesdbgddrext/106026550/core.20 120401.232840.21717.0001.dmp JVMDUMP032I JVM requested Heap dump using '/tmp/bld_106960/cmdLineTester_classesdbgddrext/106026550/heapdu mp.20120401.232840.21717.0002.phd' in response to an event JVMDUMP010I Heap dump written to /tmp/bld_106960/cmdLineTester_classesdbgddrext/106026550/heapdum p.20120401.232840.21717.0002.phd JVMDUMP032I JVM requested Java dump using '/tmp/bld_106960/cmdLineTester_classesdbgddrext/106026550/javaco re.20120401.232840.21717.0003.txt' in response to an event JVMDUMP010I Java dump written to /tmp/bld_106960/cmdLineTester_classesdbgddrext/106026550/javacor e.20120401.232840.21717.0003.txt JVMDUMP032I JVM requested Snap dump using '/tmp/bld_106960/cmdLineTester_classesdbgddrext/106026550/Snap.2 0120401.232840.21717.0004.trc' in response to an event JVMDUMP010I Snap dump written to /tmp/bld_106960/cmdLineTester_classesdbgddrext/106026550/Snap.20 120401.232840.21717.0004.trc JVMDUMP013I Processed dump event "systhrow", detail "java/lang/OutOfMemoryError". Exception in thread "Thread-20" java.lang.OutOfMemoryError: Java heap space at java.lang.StringBuffer.ensureCapacityImpl(StringBuffer.java:338) at java.lang.StringBuffer.append(StringBuffer.java:204) at Test$StreamMatcher.run(Unknown Source) . Stack Trace: N/A . "!!! The external wall clock shift (backwards) detected !!!" message in GC verbose log
This is extremely intermittent issue occur if computer clock was adjusted while Java program was running. This is -Xgcpolicy:gencon specific issue, so this issue can be worked around using another GC policy or just re-running Java program.
An adjustment of computer clock while Java program is running can create an effect of "time goes backwards" when GC End time is earlier then GC Start time. This might be a reason for mistake in calculation of duration of GC Cycle (very large number). The result of this might be unnecessary throwing OOM or even crash in Java VM
This defect will be fixed in: 7.0.0 SR3 6.0.1 SR4 . Added detection of "time goes backwards" situation and adjust required calculations.
Reported component name
J9 COMMON CODE
Reported component ID
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
J9 COMMON CODE
Fixed component ID
Applicable component levels
Rate this page:
Copyright and trademark information
IBM, the IBM logo and ibm.com are trademarks of International Business Machines Corp., registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the Web at "Copyright and trademark information" at www.ibm.com/legal/copytrade.shtml.