PH59804: A DOUBLE FAULT ABEND ON THE SAME IIB TCB CAN RESULT IN AN IIB ABEND HANDLER LOOP

APAR status

• Closed as program error.

Error description

• If a single IIB message flow thread encounters a double fault
  abend, the IIB abend handler code can end up in an endless loop
  with the following call back stack:
  ImbWstring::assign(const ImbWstring&)
  ImbFlowThreadReporter::dumpFlowDataForAppReportMap(std::map<
  ImbFlowThreadReporter::FlowThreadData::reportForAbend(ImbWst
  ImbFlowThreadReporter::ImbAbendContributor::contribute(int)
  ImbAbend::terminateProcessInternal(const void*,bool)
  ImbAbend::doubleFaultHandler(const char*)
  ImbAbend::signalHandlerInternal(int,siginfo_t*,void*)
  ImbAbendSignalHandler
  

Local fix

• NA
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM Integration Bus on z/OS
  
  
  Platforms affected:
  z/OS
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  If a single IIB message flow thread encounters a double fault
  abend, the IIB abend handler code can end up in an endless loop
  with the following call back stack:
  
  ImbWstring::assign(const ImbWstring&)
  ImbFlowThreadReporter::dumpFlowDataForAppReportMap(std::map<
  ImbFlowThreadReporter::FlowThreadData::reportForAbend(ImbWst
  ImbFlowThreadReporter::ImbAbendContributor::contribute(int)
  ImbAbend::terminateProcessInternal(const void*,bool)
  ImbAbend::doubleFaultHandler(const char*)
  ImbAbend::signalHandlerInternal(int,siginfo_t*,void*)
  ImbAbendSignalHandler
  

Problem conclusion

• The product has been modified to resolve the abend handler loop.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v10.1      10.1.0.4
  
  The latest available maintenance can be obtained from:
  http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
  
  If the maintenance level is not yet available,information on
  its planned availability can be found on:
  http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
  ---------------------------------------------------------------
  

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

  INT BUS FOR Z/O

• Fixed component ID

  5655AB110

Applicable component levels