PH32408: ITX LAUNCHER RUNNING IN DOCKER IS GENERATING A LARGE AMOUNT OF DETACHED JVM THREADS

APAR status

• Closed as program error.

Error description

• Problem may occur when using the IBM Transformation Extender
  9.0.0.x Launcher in a Docker environment.
  
  ITX Launcher may generate a large amount of detached JVM
  threads (more than 1000).
  
  A JVM core file shows hundreds of these detached JVM threads
  like this:
  
  3XMTHREADINFO Anonymous native thread
  3XMTHREADINFO1 (native thread ID:0x18273, native priority: 0x0,
  native policy:UNKNOWN)
  3XMTHREADINFO3 Native callstack:
  4XENATIVESTACK (0x00007FB538F5A8C3 [libj9prt29.so+0x4e8c3])
  4XENATIVESTACK (0x00007FB538F5A944 [libj9prt29.so+0x4e944])
  4XENATIVESTACK (0x00007FB538F5A70A [libj9prt29.so+0x4e70a])
  4XENATIVESTACK (0x00007FB538F56AEF [libj9prt29.so+0x4aaef])
  4XENATIVESTACK (0x00007FB572388390 [libpthread.so.0+0x11390])
  4XENATIVESTACK pthread_cond_wait+0xbe (0x00007FB57238435E
  [libpthread.so.0+0xd35e])
  4XENATIVESTACK acquire_semaphore+0x46 (0x00007FB573F0565E
  [libmercrmgr.so+0x1265e])
  
  The problem may be more prevalent when the Launcher calls Java
  based adapters, such as MongoDB as well as calls to the JEXIT()
  function.
  

Local fix

• ITXCQ - ITX00060522
  PB / CN
  Circumvention: Add the following to the dtx.ini file, which will
  be set as defaults in future releases.
  
  IdleICC=300
  SLimICC=20
  ;HLimICC=0
  ;MinICC=0
  

Problem summary

• Users Affected:
  IBM Transformation Extender users using IBM Control Center
  adapter.
  
  Problem Description:
  Default connection manager configuration for IBM Control Center
  leaves dangling native threads and threads show up under a
  heavy load environment when some of the maps are processing a
  large batch of EDI documents.
  
  Platforms Affected:
  All
  

Problem conclusion

• Added default configuration for the IBM Control Center (ICC) to
  avoid dangling JVM native threads in a heavy load environment
  when ICC adapter processing a large batch of documents to post
  events to the IBM Control Center.
  
  Applies to:
  10.0.0.0 10.0.3.0 10.1.0.0
  
  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