PH32086: RMI SERVER CRASHING WHEN USED IN SINGLE PROCESS MODE WITH HIGH VOLUME / FREQUENCY THROUGHPUT

APAR status

• Closed as program error.

Error description

• When the RMI Server is running in single process mode and there
  are many client requests made in quick succesion, it may be
  noted that the RMI Server crashes.
  
  Example stack trace:
  
  ==13362== Thread 20 RMI TCP Connection(410)-10.14.40.209:
  ==13362== Invalid read of size 4
  ==13362==    at 0x22C7AA9A: Seek64 (mercio.c:5161)
  ==13362==    by 0x6270D6C: BuildOutputs (s_system.c:3003)
  ==13362==    by 0x626E77F: RunInstance (s_system.c:2421)
  ==13362==    by 0x626C369: RunMercMap (s_system.c:1914)
  ==13362==    by 0x22C7E6EE: RunAllMaps (mercrun.c:3478)
  ==13362==    by 0x22C88F94: CallRunMap (runmerex.c:2367)
  ==13362==    by 0x22C88183: RunMapInstance (runmerex.c:2023)
  ==13362==    by 0x4E8B6F6: CMpiMap::Run() (mercpim.cpp:3634)
  ==13362==    by 0x2280ED65:
  Java_com_ibm_websphere_dtx_dtxpi_MMap_run (in
  /opt/ibm/itx9004/libs/libdstxjpi.so)
  ==13362==    by 0xACC9103: ffi_call_unix64 (in
  /opt/ibm/itx9004/java/lib/amd64/compressedrefs/libj9vm29.so)
  ==13362==    by 0xACC6890: ffi_call (in
  /opt/ibm/itx9004/java/lib/amd64/compressedrefs/libj9vm29.so)
  ==13362==    by 0xABB6329:
  VM_BytecodeInterpreter::run(J9VMThread*) (in
  /opt/ibm/itx9004/java/lib/amd64/compressedrefs/libj9vm29.so)
  ==13362==  Address 0x44e is not stack'd, malloc'd or (recently)
  free'd
  

Local fix

• ITXCQ - ITX00060643
  PB / PB
  Circumvention: None
  

Problem summary

• Users Affected:
  IBM Transformation Extender users using launcher or calling
  command engine via API and running a lot of different maps.
  
  Problem Description:
  Random crashes in core engine. Problem occurs when two maps are
  loaded into memory then releases the first map from memory. The
  second map contained a pointer to a function that was deleted
  when the first map was removed from memory.
  
  Platforms Affected:
  All
  

Problem conclusion

• Removed function from map memory and stored separately so when
  map is deleted from memory function remains in memory.
  
  Applies to:
  9.0.0.4, 10.0.0.0
  
  Fixed in the next service packs and releases.
  
  To obtain the fix for this APAR:
  
  To see if the next service pack or product release is available,
  check the IBM Transformation Extender Release Notes page:
  https://www.ibm.com/support/docview.wss?uid=swg27008337
  
  If the service pack or product release is available, download it
  from Fix Central:
  http://www.ibm.com/support/fixcentral/
  
  If the service pack or product release is not available and you
  require the APAR fix immediately, request a Limited Availability
  Interim Fix (LAIF) by opening a case:
  https://www.ibm.com/mysupport/
  
  Prior to version 9.0.0, IBM Transformation Extender was called
  IBM WebSphere Transformation Extender.
  

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

  ITX

• Fixed component ID

  5724Q2300

Applicable component levels