JR63874: DEADLOCK IN JAVA THREADS WITH OBJECTS BLOCKED ON: COM/IBM/WS/BOX/BORESOURCELOCATOR AND TYPEREGISTRY

APAR status

• Closed as program error.

Error description

• If your IBM Business Automation Workflow (BAW 20.0.0.2) server
  is running a
  heavy load, the server might deadlock and you might see an
  error message in the the javacore file like the
  following error message:
  
  1LKDEADLOCK   Deadlock detected !!!
  NULL          ---------------------
  NULL
  2LKDEADLOCKTHR Thread "SIBJMSRAThreadPool : 10"
  (0x000000000BEEB300)
  3LKDEADLOCKWTR   is waiting for:
  4LKDEADLOCKMON     sys_mon_t:0x00007F1844CB10C8 infl_mon_t:
  0x00007F1844CB1148:
  4LKDEADLOCKOBJ
  com/ibm/ws/box/BOResourceLocator@0x0000000109C7FD10
  3LKDEADLOCKOWN   which is owned by:
  2LKDEADLOCKTHR Thread "Default : 88" (0x0000000003E55400)
  3LKDEADLOCKWTR   which is waiting for:
  4LKDEADLOCKMON     sys_mon_t:0x00007F19640A7A68 infl_mon_t:
  0x00007F19640A7AE8:
  4LKDEADLOCKOBJ
  com/ibm/xml/xci/type/TypeRegistry@0x0000000108ED62A8
  3LKDEADLOCKOWN   which is owned by:
  2LKDEADLOCKTHR Thread "SIBJMSRAThreadPool : 10"
  (0x000000000BEEB300)
  

Local fix

• N/A
  

Problem summary

• This issue occurs because one thread when calling BOScopeManager
   to getReferenceSourceByLoading it owned the BOResourceLocator
  lock and trying to acquire the TypeRegistry lock, however
  another thread had already owned the TypeRegistry lock by the
  sdo/helper/TypeHelper and need to acquire the BOResourceLocator
  lock to getAllSources which caused the deadlock issue.
  
  PRODUCTS AFFECTED
  IBM Business Process Manager (BPM) Advanced
  IBM Business Automation Workflow
  

Problem conclusion

• A fix is available or will be available that ensures the locks
  will be acquired in the order of TypeRegistry and then
  BOResourceLocator.
  

Temporary fix

• Not applicable.
  

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

  BUS AUTO WORKFL

• Fixed component ID

  5737H4100

Applicable component levels