PM53086: THE INTERMITTENT FAULT DURING STARTUP IN MULTITHREADED ENVIRONMENT

APAR status

• Closed as program error.

Error description

• Multithreaded WTX API system (including WESB, WMB and
  Sterling Integrator (only 8.4 release) may crash with the
  following stack trace when multiple maps are executed at the
  same time during application startup.
  
  realloc
  UGlobalReAllocPtr
  AllocExit
  FindExit
  MercExitProcEx
  MercExitProc
  

Local fix

• WTXCQ - WTX00039477
  

Problem summary

• Users Affected:
  WebSphere Transformation Extender customers using EXIT function
  in multithreaded environment
  
  Problem Description:
  This problem applies only to WTX maps that use EXIT function.
  In multithreaded environment using WTX API-s and on the first
  map run, multiple threads can access the same pointer in
  AllocExit function resulting with the abend in AllocExit
  function, malloc or realloc.
  
  Platforms Affected:
  ALL
  

Problem conclusion

• Added a critical section to protect access to the memory pointer
  in AllocExit function during EXIT call allocation
  
  Delivered in:
  8.2.0.6, 8.3.0.5, 8.4.0.1
  

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

  WSTX

• Fixed component ID

  5724M4000

Applicable component levels

• R820 PSY

     UP

• R830 PSY

     UP

• R840 PSY

     UP