PM32618: DEADLOCK IN COM/IBM/WS/ASYNCHBEANS/SERVICES/WLM/ENCLAVEMANAGER

Fixes are available

APAR status

Closed as program error.

Error description

When running Websphere Application Server zOS, the
com/ibm/ws/asynchbeans/services/wlm/EnclaveManager goes into a
deadlock with two threads causing the server to hang and
eventually timeout with an EC3/04130007.

The external symptoms would be a server hang/timeout with the
below.
BBOO0327I HTTP REQUEST TIMEOUT:
(0301):(FCCD51ED):(0001001D):(009B6088):(STC64556):
(2011/01/29 21:45:01.811575):(2011/01/29 21:45:02.046377):
(2011/01/29 21:45:02.054852):(RemoteWebContainer):(httprequest):
(ipaddr=a.b.b.d port=xxxx):():():(/aaaaa/bbbbb)

When extracted the javacore from the EC3 dump we found the below
deadlock contention.
1LKDEADLOCK    Deadlock detected !!!
NULL           ---------------------
NULL
2LKDEADLOCKTHR  Thread
"java.lang.ThreadGroup[name=DefaultWorkManager:
CWS_LOGON_EAR,maxpri=10]" (0x4EFFCC00)
3LKDEADLOCKWTR    is waiting for:
4LKDEADLOCKMON      sys_mon_t:0x5113A2AC infl_mon_t: 0x5113A2EC:
4LKDEADLOCKOBJ      java/util/HashMap@36548D18/36548D24:
3LKDEADLOCKOWN    which is owned by:
2LKDEADLOCKTHR  Thread "WebSphere:ORB.thread.pool t=009be9d8"
(0x527A0500)
3LKDEADLOCKWTR    which is waiting for:
4LKDEADLOCKMON      sys_mon_t:0x5113A7FC infl_mon_t: 0x5113A83C:
4LKDEADLOCKOBJ
com/ibm/ws/asynchbeans/services/wlm/Enclave@2EAE7F80/2EAE7F8C:
3LKDEADLOCKOWN    which is owned by:
2LKDEADLOCKTHR  Thread
"java.lang.ThreadGroup[name=DefaultWorkManager:
CWS_LOGON_EAR,maxpri=10]" (0x4EFFCC00)

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application Server
*                  V6.1.0                                      *
****************************************************************
* PROBLEM DESCRIPTION: Deadlock in AsynchBean classification   *
*                      service.                                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
There is a circular reference in the EnclaveManager code that
could lead to deadlock, when two threads simultaneously work
on the single object of this class.

Problem conclusion

The problem is fixed by avoiding circular reference.

APAR PM32618 is currently targeted for inclusion in
Service Level (Fix Pack) 6.1.0.39 of WebSphere
Application Server V6.1.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

Temporary fix

Comments

APAR Information

APAR number
PM32618
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-02-14
Closed date
2011-04-06
Last modified date
2011-08-01

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

PM35239

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R610 PSY UK69361
UP11/07/16 P F107

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
27 October 2021

Tips

PM32618: DEADLOCK IN COM/IBM/WS/ASYNCHBEANS/SERVICES/WLM/ENCLAVEMANAGER

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

R610 PSY UK69361

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

Document Information

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