PI20036: STACK OVERFLOW IN PROCESSCPU MODULE.

8.5.5.3: WebSphere Application Server V8.5.5 Fix Pack 3
PI20036;8.5.5: stack overflow in processcpu module
8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
IBM WebSphere Virtual Enterprise Version 7.0 Fix Pack 6, also known as Version 7.0.0.6 is available for download.
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
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
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• java.exe crashed during workload on Microsoft Windows
  A stackOverflow problem implicating ProcessCPU64.dll is  due
  to the CreateToolhelp32Snapshot function in Microsoft Windows'
  Kernel32.dll library returning a process tree which has a
  parent/child cycle (i.e. child is the parent of himself).  This
  causes ProcessCPU to go into infinite recursion as it attempts
  to do a depth-first traversal of the process tree.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: stackOverflow in ProcessCPU module      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  WebSphere Application Server native code ProcessCPU64.dll
  experiences native stackoverflow and crash while collecting
  CPU stats. The stackOverflow problem implicating
  ProcessCPU64.dll is due to the CreateToolhelp32Snapshot
  function in Microsoft Windows'Kernel32.dll library returning a
  process tree which has a parent/child cycle. This causes
  ProcessCPU to go into infinite recursion as it attempts to do
  a depth-first traversal of the process tree.
  

Problem conclusion

• The code is fixed to find the parent Process ID in the list of
  child process IDs returned in process structure and skipped to
  avoid the infinite recursion.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.5.3  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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