JR41386: OutOfMemory issue caused by complex business object definition.

APAR status

• Closed as program error.

Error description

• There is a process app depends on a toolkit, and there are
  complex Business Object definitions in the toolkit. If a
  variable was added with type defined in this toolkit to a
  BPD, no matter how simple this BPD is, there will be out of
  memory error as soon as a BPD instance started (Even the
  inspector view can not be seen).
  
  Reproduce Steps:
  1) import the attached .twx file according to your BPM version.
  2) run process (there is only one process in both .twx file)
  directly.
  3) wait for about 3-5 mins, OOM error will be thrown.
  p.s. you can also start instance from process portal, the test
  result is same.
  
  Findings:
  1) The problem is not resolved even after increasing process
  center's max heap size to 2G from 768M (default value).
  
  2) From the GC log, excessive GC detected. The application seems
  to be using some quite large objects. The largest request which
  triggered an allocation failure was for 5106912 bytes.
  
  3) From the Javacore, Java heap is almost exhausted : 0% free
  Java heap
  The number of waiting on condition threads are 228 ( 89% )
  thread method:
  Method Name Number of Threads Percentage
  java/lang/Object.wait(Native Method) 189 74 (%)
  java/lang/Thread.sleep(Native Method) 13 5 (%)
  ...
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  User has complex business object defined    *
  *                  in business process.                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: There is a process app depends on a     *
  *                      toolkit, and there are complex          *
  *                      Business Object definitions in the      *
  *                      toolkit. If a variable was added with   *
  *                      type defined in this toolkit to a       *
  *                      BPD, no matter how simple this BPD is,  *
  *                      there will be out of memory error as    *
  *                      soon as a BPD instance started (Even    *
  *                      the inspector view can not be seen).    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  OutOfMemory issue caused by complex business object
  definition.
  

Problem conclusion

• In version 7.5.0 Fix Pack 1 (7.5.0.1), this fix is available
  as a part of the JR42581 ifix package.
  JR42581 can be downloaded from Fix Central:
  http://www-933.ibm.com/support/fixcentral/swg/quickorder?parent=
  ibm~WebSphere&product=ibm/WebSphere/IBM+Business+Process+Manager
  +Advanced&release=7.5.0.1&platform=All&function=fixId&fixids=7.5
  .0.1-WS-BPM-IFJR42581&includeSupersedes=0&source=fc
  The installation instruction can be downloaded along with
  JR42581 ifix file.
  

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

  BPM ADVANCED

• Fixed component ID

  5725C9400

Applicable component levels

• R750 PSY

     UP

• R751 PSY

     UP