PI59372: DEADLOCK MAY OCCUR IN CSCOPE RECOVERYMANAGER

Fixes are available

APAR status

Closed as program error.

Error description

A deadlock may occur in the CScope RecoveryManager.  A
javacore shows callstacks of the following form:

 "HAManager.thread.pool : 1"
   Waiting on:
   com/ibm/ws/cscope/EventSemaphore@0x0000000103688678
   Owned by: <unowned>
   at java/lang/Object.wait(Native Method)
   at java/lang/Object.wait(Object.java:167(Compiled Code))
   at com/ibm/ws/cscope/EventSemaphore.waitEvent
      (EventSemaphore.java:62)
      (entered lock: com/ibm/ws/cscope/
       EventSemaphore@0x0000000103688678, entry count: 1)
   at
com/ibm/ws/cscope/RecoveryManager.waitForRecoveryCompletion
      (RecoveryManager.java:1565)
   at com/ibm/ws/cscope/RecoveryManager.prepareToShutdown
      (RecoveryManager.java:1550)
   at
com/ibm/ws/cscope/CScopeFailureScopeLifeCycleHelper.shutdown
      (CScopeFailureScopeLifeCycleHelper.java:298)
   at com/ibm/ws/cscope/RecoveryManager.terminateRecovery
      (RecoveryManager.java:1461)
      (entered lock: java/lang/Object
        @0x00000000996F14B8, entry count: 1)
   at com/ibm/ws/cscope/CScopeRecoveryAgent.terminateRecovery
      (CScopeRecoveryAgent.java:198)
   at
com/ibm/ws/recoverylog/spi/RecoveryDirectorImpl.directTerminatio
n
      (RecoveryDirectorImpl.java:823)
   at
com/ibm/ws/recoverylog/spi/RLSHAGroupCallback.memberDeactivate
      (RLSHAGroupCallback.java:367)
   at com/ibm/ws/hamanager/impl/HAGroupImpl.doDeactivateMember
      (HAGroupImpl.java:761)
   at com/ibm/ws/hamanager/impl/HAGroupImpl$
      HAGroupUserCallback.doCallback(HAGroupImpl.java:1379)
   at com/ibm/ws/hamanager/impl/Worker.run(Worker.java:64
      (Compiled Code))
   at
com/ibm/ws/util/ThreadPool$Worker.run(ThreadPool.java:1892)

 "Thread-2270"
   Blocked on: java/lang/Object@0x00000000996F14B8
   Owned by: "HAManager.thread.pool : 1"
   at com/ibm/ws/cscope/RecoveryManager.processRecoveredData
      (RecoveryManager.java:1027)
      (entered lock: com/ibm/ws/cscope/RecoveryManager
        @0x00000001036871F0, entry count: 1)
   at
com/ibm/ws/cscope/RecoveryManager.run(RecoveryManager.java:649)

Local fix

```
N.\/A
```

Problem summary

****************************************************************
* USERS AFFECTED:  WebSphere Application Server users of       *
*                  Business Activities (CScopes).              *
****************************************************************
* PROBLEM DESCRIPTION: WSVR0605W message occurs indicating     *
*                      a thread may be hung in the             *
*                      com.ibm.ws.cscope.RecoveryManager       *
*                      class                                   *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Synchronization in the CScope RecoveryManager class is
performed both using an intrinsic lock on the RecoveryManager
instance and a wait/notifyAll pattern on another internal
object. The thread holding the intrinsic lock waited for the
notify.  The thread that would post the notify was blocked
trying to obtain the intrinsic lock.

Problem conclusion

The synchronization within the CScope RecoveryManager was
modified so that the condition can no longer occur.

The fix for this APAR is currently targeted for inclusion in
fix packs 8.5.5.13 and 9.0.0.5.  Please refer to the
Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI59372
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-03-17
Closed date
2017-07-21
Last modified date
2017-07-28

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
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R850 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI59372: DEADLOCK MAY OCCUR IN CSCOPE RECOVERYMANAGER

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R850 PSY

Document Information

Share your feedback

Need support?