IV73188: ERRORS LOADING PHD HEAPDUMPS INTO MEMORY ANALYZER

PI42776: Ship Java 6/26 SR8 FP4 +IX90162+IV73188+IV73934 FOR WSAS V8.5.0.X AND V8.5.5.X
PI42775 : Ship Java 7 SR9 +IX90162+IV73188+IV73934 FOR WSAS V8.5.0.X AND V8.5.5.X
PI42774 : Ship Java 7.1 SR3 +IX90162+IV73188+IV73934 FOR WSAS V8.5.5.2 and higher
PI42777: Ship Java 6/26 SR8 FP4 +IX90162+IV73188+IV73934 FOR WSAS V8.0.0.X
PI42773 :
PI42781: Ship Java 6/26 SR8 FP4 +IX90162+IV73188+IV73934  Liberty profile V855X

APAR status

• Closed as program error.

Error description

• Error Message: When a PHD heapdump is loaded into Memory
  Analyzer, corrupt class names are reported, for example:4,365
  instances of "corruptClassName@0xc012fc38", loaded by "<system
  class loader>" occupy 895,745,568 (90.60%)
  bytes.?corruptClassName@0xc012fc38 @ 0xd6025778 - 11,579,672
  (1.17%) bytes.?corruptClassName@0xc012fc38 @ 0xc7432638 -
  11,579,600 (1.17%) bytes.?corruptClassName@0xc012fc38 @
  0xc0e32890 - 11,579,552 (1.17%) bytes.
  .
  Stack Trace: The Memory Analyzer log contains error messages and
  stack traces, for examples:!ENTRY org.eclipse.mat.ui 4 0
  2015-05-06 13:36:10.800!MESSAGE Corrupt data reading heap
  sections at 0xefa265a8 : com.ibm.dtfj.phd.PHDCorruptImageSection
  Corrupt Java heap 0xefa265a8:0xefa265b0 from Java runtime at
  0x0!STACK 0com.ibm.dtfj.image.CorruptDataException:
  com.ibm.dtfj.phd.PHDCorruptImageSection Corrupt Java heap
  0xefa265a8:0xefa265b0at
  org.eclipse.mat.dtfj.DTFJIndexBuilder.logCorruptData(DTFJIndexBu
  ilder.java:4858)at
  org.eclipse.mat.dtfj.DTFJIndexBuilder.isCorruptData(DTFJIndexBui
  lder.java:4597)at
  org.eclipse.mat.dtfj.DTFJIndexBuilder.fill(DTFJIndexBuilder.java
  :967)at
  org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(Snapsh
  otFactoryImpl.java:237)at
  org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnapshot
  (SnapshotFactoryImpl.java:141)at
  org.eclipse.mat.snapshot.SnapshotFactory.openSnapshot(SnapshotFa
  ctory.java:145)at
  org.eclipse.mat.ui.snapshot.ParseHeapDumpJob.run(ParseHeapDumpJo
  b.java:84)at
  org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)!ENTRY
  org.eclipse.mat.ui 2 0 2015-05-06 13:36:10.831!MESSAGE Problem
  finding component class for class 0xc3b9de40!STACK
  0com.ibm.dtfj.image.CorruptDataException: component type for
  <OSB>Lcom/ibm/ws/config/admin/ConfigID; is
  com/ibm/ws/config/admin/ConfigID which is not found from
  com.ibm.dtfj.phd.PHDJavaClassLoader@505d64e8 at 0xc3b9de40at
  com.ibm.dtfj.phd.PHDJavaClass.getComponentType(PHDJavaClass.java
  :244)at
  org.eclipse.mat.dtfj.DTFJIndexBuilder.rememberClass(DTFJIndexBui
  lder.java:3207)at
  org.eclipse.mat.dtfj.DTFJIndexBuilder.fill(DTFJIndexBuilder.java
  :1124)at
  org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(Snapsh
  otFactoryImpl.java:237)at
  org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnapshot
  (SnapshotFactoryImpl.java:141)at
  org.eclipse.mat.snapshot.SnapshotFactory.openSnapshot(SnapshotFa
  ctory.java:145)at
  org.eclipse.mat.ui.snapshot.ParseHeapDumpJob.run(ParseHeapDumpJo
  b.java:84)at
  org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
  .
  

Local fix

• A system dump can be used instead of a PHD heapdump to
  investigate Java heap issues using Memory Analyzer.
  

Problem summary

• The JVM is producing PHD heapdumps containing an error in the
  number of references listed for a PHD Class Record.
  

Problem conclusion

• The JVM has been updated to correct the error in the PHD
  heapdump.
  .
  This APAR will be fixed in the following Java Releases:
     7 R1 SR3 FP10  (7.1.3.10)
     6 R1 SR8 FP7   (6.1.8.7)
     7    SR9 FP 10 (7.0.9.10)
     8    SR1 FP10  (8.0.1.10)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             https://www.ibm.com/developerworks/java/jdk/
  

Temporary fix

Comments

APAR Information

• 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