JR64791: YOU SEE BLOCKED THREADS AT COM/IBM/WS/AL/SCOPE/SCOPECONTEXTMANAGER UNDER HEAVY LOAD

workflow.2202.delta.repository
8.6.20020002-WS-BPM-IFJR64791

APAR status

• Closed as fixed if next.

Error description

• If your IBM Business Automation Workflow Server is running a
  heavy load, you might see many threads blocked on
  com/ibm/ws/al/scope/ScopeContextManager as below:
  
  3XMTHREADINFO      "Default : 5" J9VMThread:0x0000000004E52A00,
  omrthread_t:0x00007F95BC6005B8,
  java/lang/Thread:0x0000000048435698, state:B, prio=5
  3XMJAVALTHREAD            (java/lang/Thread getId:0x183,
  isDaemon:true)
  3XMTHREADINFO1            (native thread ID:0x14FF, native
  priority:0x5, native policy:UNKNOWN, vmstate:B, vm thread
  flags:0x00000281)
  3XMTHREADINFO2            (native stack address range
  from:0x00007F95BC881000, to:0x00007F95BC8C1000, size:0x40000)
  3XMCPUTIME               CPU usage total: 28.741322101 secs,
  current category="Application"
  3XMTHREADBLOCK     Blocked on:
  com/ibm/ws/al/scope/ScopeContextManager@0x000000004271D3D8 Owned
  by: "Default : 4" (J9VMThread:0x0000000004DB9F00,
  java/lang/Thread:0x0000000048627100)
  3XMHEAPALLOC             Heap bytes allocated since last GC
  cycle=4422120 (0x4379E8)
  3XMTHREADINFO3           Java callstack:
  4XESTACKTRACE                at
  com/ibm/ws/al/scope/ScopeContextManager.get(ScopeContextManager.
  java:136(Compiled Code))
  5XESTACKTRACE                   (entered lock:
  com/ibm/ws/al/scope/ScopeContextManager@0x000000004271D3D8,
  entry count: 1)
  4XESTACKTRACE                at
  com/ibm/ws/al/scope/ScopeContextManager.getContext(ScopeContextM
  anager.java:220(Compiled Code))
  
  PRODUCTS AFFECTED
  IBM Business Automation Workflow
  

Local fix

Problem summary

• A number of threads gets blocked in method
  com/ibm/ws/al/scope/ScopeContextManager.get due to an incorrect
  synchronization in it.
  

Problem conclusion

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

Applicable component levels