JR48822: CPU STARVATION AND OutOfMemoryError WHEN VIEWING ROLE BINDINGS TAB on the Process Admin Console

Version 7.5.1 Fix Pack 2 for the IBM Business Process Manager products
Version 8.5 Refresh Pack 5 for the IBM Business Process Manager products
Download Version 8.0.1 Fix Pack 3 for the IBM Business Process Manager products

APAR status

• Closed as program error.

Error description

• java.lang.OutOfMemoryError when viewing role bindings tab on
  the Process Admin Console.
      The heapdump generated shows the following
  
  62 instances of "java.util.AbstractList$SimpleListIterator",
  loaded by
  "<system class loader>" occupy 4,555,735,960 (74.94%) bytes.
  
  182,115,232 (3%) [32] 1
  java/util/AbstractList$SimpleListIterator
  |- 182,115,200 (3%) [32] 1 java/util/ArrayList 0x123ffe5c8
   |- 182,115,168 (3%) [672,536] 120,035 array of
  java/lang/Object
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,632 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,608 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,608 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,608 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,608 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,608 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- 1,608 (0%) [296] 29
  com/lombardisoftware/client/persistence/Task
    |- There are 120,015 more children
  If the customer clicks Role Binding in the Process Admin
  Console then every 15 seconds a refresh triggers a new request
  to get the Role Binding information.
  If the first request isn't complete in 15 seconds then the next
  request is started and so on. Each request counts the tasks and
  requires the memory for this.
  Through the parallel threads the memory consumption increases
  til a OOM occurs.
  

Local fix

• NA
  

Problem summary

• CPU starvation and OOM might occur when viewing role bindings
  tab
  
  PROBLEM DETAILED DESCRIPTION:
  If the customer clicks Role Binding in the Process Admin Console
  then every 15 seconds a refresh triggers a new request to get
  the Role Binding information.
  If the first request isn't complete in 15 seconds then the next
  request is started and so on. Each request counts the tasks and
  requires the memory for this.
  Due to the parallel threads the memory consumption increases
  until a OOM occurs.
  

Problem conclusion

• We inserted a configuration property to define the refresh rate.
  Please add the following lines to your 100Custom.xml in the
  server section
  <server>  <!-- create if not already present>
   <process-admin-console>
    <refresh-interval>Refresh time in milliseconds
    </refresh-interval>
   </process-admin-console>
  </server> <!-- create if not already present>
  
  FIX AVAILABILITY:
  iFix for 7.5.1.1 is/will be available on Fix Central; search for
  APAR JR48822 at http://www.ibm.com/support/fixcentral/
  Fix is also targetted for inclusion in next fixpack for
  BPM V7.5.1, BPM 8.0.1
  
  When obtaining any of the above fixes, be sure to download the
  accompanying readme, for itself, and any prerequisite fixes, and
  review them thorougly.
  

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 STANDARD

• Fixed component ID

  5725C9500

Applicable component levels

• R751 PSY

     UP