APAR status
Closed as program error.
Error description
Error Message: N/A . Stack Trace: com.ibm.j9ddr.corereaders.memory.MemoryFault: Memory Fault reading 0x0106D1F8at com.ibm.j9ddr.corereaders.memory.AbstractMemory$CachingMemorySou rce.loadBlock(AbstractMemory.java:481)at com.ibm.j9ddr.corereaders.memory.AbstractMemory$CachingMemorySou rce.getBytes(AbstractMemory.java:441)at com.ibm.j9ddr.corereaders.memory.AbstractMemory.getBytesAt(Abstr actMemory.java:180)at com.ibm.j9ddr.corereaders.memory.AbstractMemory.getBytesAt(Abstr actMemory.java:165)at com.ibm.j9ddr.corereaders.memory.AbstractMemory.getIntAt(Abstrac tMemory.java:215)at com.ibm.j9ddr.corereaders.memory.ProcessAddressSpace.getPointerA t(ProcessAddressSpace.java:65)at com.ibm.j9ddr.vm26.pointer.AbstractPointer.getPointerAtOffset(Ab stractPointer.java:364)at com.ibm.j9ddr.vm26.pointer.generated.J9JavaStackPointer.previous (J9JavaStackPointer.java:180)at com.ibm.j9ddr.vm26.j9.J9JavaStackIterator.next(J9JavaStackIterat or.java:58)at com.ibm.j9ddr.vm26.view.dtfj.java.DTFJJavaThread.walkSections(DT FJJavaThread.java:410)at com.ibm.j9ddr.vm26.view.dtfj.java.DTFJJavaThread.getStackSection s(DTFJJavaThread.java:390)at org.eclipse.mat.dtfj.DTFJIndexBuilder.scanJavaThread(DTFJIndexBu ilder.java:3817)at org.eclipse.mat.dtfj.DTFJIndexBuilder.processConservativeRoots(D TFJIndexBuilder.java:2701)at org.eclipse.mat.dtfj.DTFJIndexBuilder.fill(DTFJIndexBuilder.java :1954)at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(Snapsh otFactoryImpl.java:231)at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnapshot (SnapshotFactoryImpl.java:135)at org.eclipse.mat.snapshot.SnapshotFactory.openSnapshot(SnapshotFa ctory.java:145)at org.eclipse.mat.ui.snapshot.ParseHeapDumpJob.run(ParseHeapDumpJo b.java:88)at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54) .
Local fix
Problem summary
The loop is caused when the DTFJ API encounters a file read error while traversing the stack sections for a Java thread.
Problem conclusion
The DTFJ API has been updated to handle the dump file read error without looping. . This APAR will be fixed in the following Java Releases: 7 R1 SR2 (7.1.2.0) 6 R1 SR8 FP2 (6.1.8.2) 7 SR8 (7.0.8.0) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, Java maintenance is available from: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IV65397
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
270
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2014-09-30
Closed date
2014-09-30
Last modified date
2014-09-30
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
J9 COMMON CODE
Fixed component ID
620700127
Applicable component levels
R270 PSY
UP
R260 PSY
UP
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Document Information
Modified date:
21 February 2022