PI89997: CONCURRENTMODIFICATION ERROR MIGHT HAPPEN WHEN TRACING AMM CODE

9.0.0.7: WebSphere Application Server traditional V9.0 Fix Pack 7
9.0.0.8: WebSphere Application Server traditional V9.0 Fix Pack 8
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
9.0.0.9: WebSphere Application Server traditional V9.0 Fix Pack 9
9.0.0.10: WebSphere Application Server traditional V9.0 Fix Pack 10
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
9.0.0.11: WebSphere Application Server traditional V9.0 Fix Pack 11
9.0.5.0: WebSphere Application Server traditional Version 9.0.5 Refresh Pack
9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
9.0.5.4: WebSphere Application Server traditional Version 9.0.5 Fix Pack 4
9.0.5.5: WebSphere Application Server traditional Version 9.0.5 Fix Pack 5
WebSphere Application Server traditional 9.0.5.6
9.0.5.7: WebSphere Application Server traditional Version 9.0.5 Fix Pack 7
9.0.5.8: WebSphere Application Server traditional Version 9.0.5.8
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
9.0.5.9: WebSphere Application Server traditional Version 9.0.5.9
9.0.5.10: WebSphere Application Server traditional Version 9.0.5.10
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21
9.0.5.11: WebSphere Application Server traditional Version 9.0.5.11

APAR status

• Closed as program error.

Error description

• Description:  There is a problem in the WebSphere Application
  Server annotation scanner code that might be seen when the
  "com.ibm.config.annotations.scan.state" trace is enabled.  This
   trace might be enabled when a more comprehensive trace
  specification  such as com.ibm.*=all or
  com.ibm.config.annotations.*=finer is enabled.
  When the exception occurs, the following stack trace will be
  displayed  in the log files:
  org.eclipse.jst.j2ee.commonarchivecore.internal.exception.Annota
  tionsProcessorException: CWWAM0001E: An exception occurred
  during annotation
  processing: java.util.ConcurrentModificationException
  Stack trace of nested exception:
  java.util.ConcurrentModificationException
   at java.util.HashMap$HashIterator.nextEntry(HashMap.java:934)
   at java.util.HashMap$ValueIterator.next(HashMap.java:962)
   at
  com.ibm.ws.amm.scan.util.info.impl.ClassInfoCache.log_delayedCla
  sses(ClassInfoCache.java:1793)
   at
  com.ibm.ws.amm.scan.util.info.impl.ClassInfoCache.log(ClassInfoC
  ache.java:1675)
   at
  com.ibm.ws.amm.scan.util.info.impl.InfoStoreImpl.log(InfoStoreIm
  pl.java:463)
   at
  com.ibm.ws.amm.AnnotativeMetadataManagerImpl.scan(AnnotativeMeta
  dataManagerImpl.java:781)
  

Local fix

• Remove the trace string.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server using trace specification            *
  *                  com.ibm.config.annotations.scan.state=finer *
  *                  or something more broad that includes       *
  *                  that trace specification such as            *
  *                  com.ibm.*=all or                            *
  *                  com.ibm.config.annotations.*=finer          *
  ****************************************************************
  * PROBLEM DESCRIPTION: A ConcurrentModificationException       *
  *                      might occur if the trace                *
  *                      specification                           *
  *                      com.ibm.config.annotations.scan.state=f *
  *                      iner is used.                           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When the exception occurs,
  the following stack trace will be
  displayed  in the log files:
  org.eclipse.jst.j2ee.commonarchivecore.
  internal.exception.AnnotationsProcessor
  Exception: CWWAM0001E:
  An exception occurred during annotation
  processing:
  java.util.ConcurrentModificationExcepti
  on
  Stack trace of nested exception:
  java.util.ConcurrentModificationExcepti
  on
  at
  java.util.HashMap$HashIterator.nextEntr
  y(HashMap.java:934)
  at
  java.util.HashMap$ValueIterator.next(Ha
  shMap.java:962)
  at
  com.ibm.ws.amm.scan.util.info.impl.Clas
  sInfoCache.log_delayedCla
  sses(ClassInfoCache.java:1793)
  at
  com.ibm.ws.amm.scan.util.info.impl.Clas
  sInfoCache.log(ClassInfoC
  ache.java:1675)
  at
  com.ibm.ws.amm.scan.util.info.impl.Info
  StoreImpl.log(InfoStoreIm
  pl.java:463)
  at
  com.ibm.ws.amm.AnnotativeMetadataManage
  rImpl.scan(AnnotativeMeta
  dataManagerImpl.java:781)
  

Problem conclusion

• The code has been corrected to avoid the
  ConcurrentModificationException.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.5.14 and 9.0.0.7.  Please refer to the Recommended
  Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

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

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R850 PSY

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