IBM Support

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

Fixes are available

7.0.0.19: WebSphere Application Server V7.0 Fix Pack 19
8.0.0.1: WebSphere Application Server V8.0 Fix Pack 1
7.0.0.21: WebSphere Application Server V7.0 Fix Pack 21
8.0.0.2: WebSphere Application Server V8.0 Fix Pack 2
8.0.0.3: WebSphere Application Server V8.0 Fix Pack 3
7.0.0.23: WebSphere Application Server V7.0 Fix Pack 23
8.0.0.4: WebSphere Application Server V8.0 Fix Pack 4
7.0.0.25: WebSphere Application Server V7.0 Fix Pack 25
8.0.0.5: WebSphere Application Server V8.0 Fix Pack 5
7.0.0.27: WebSphere Application Server V7.0 Fix Pack 27
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
7.0.0.29: WebSphere Application Server V7.0 Fix Pack 29
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
6.1.0.39: Java SDK 1.5 SR12 FP4 Cumulative Fix for WebSphere Application Server
6.1.0.41: Java SDK 1.5 SR12 FP5 Cumulative Fix for WebSphere Application Server
6.1.0.43: Java SDK 1.5 SR13 Cumulative Fix for WebSphere Application Server
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server
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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.



Document information

More support for: WebSphere Application Server for z/OS
General

Software version: 6.1

Reference #: PM32618

Modified date: 01 August 2011