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PM41930: DEADLOCK CAN OCCUR IN FFDC WHEN A COMPONENT INVOKES FFDC WITHIN A LOGGING CALL

Fixes are available

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
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
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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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The logging of a WSSecurityException exception also invokes
    FFDC in the printStackTrace method.  This caan cause a
    deadlock as follows when other components are trying to invoke
    FFDC as in the example shown below:
    
    
    Deadlock in FFDC components.
    WebSphere Application Server V7.0.0.13.
    Distributed operating Systems.
    
    
    *****
    1LKDEADLOCK    Deadlock detected !!!
    
    NULL           ---------------------
    NULL
    2LKDEADLOCKTHR  Thread "WebContainer : 397" (0x0000000004EBF600)
    3LKDEADLOCKWTR    is waiting for:
    4LKDEADLOCKMON      sys_mon_t:0x00000200283F76E0 infl_mon_t:
    0x00000200283F7750:
    4LKDEADLOCKOBJ
    com/ibm/ws/ffdc/impl/FfdcProvider@0x00000000815FE578/0x000000008
    15FE584:
    3LKDEADLOCKOWN    which is owned by:
    2LKDEADLOCKTHR  Thread "WebContainer : 393" (0x0000000005103000)
    3LKDEADLOCKWTR    which is waiting for:
    4LKDEADLOCKMON      sys_mon_t:0x00000200246B3890 infl_mon_t:
    0x00000200246B3900:
    4LKDEADLOCKOBJ
    com/ibm/ejs/ras/SystemOutStream@0x00000000810E0830/0x00000000810
    E083C:
    3LKDEADLOCKOWN    which is owned by:
    2LKDEADLOCKTHR  Thread "WebContainer : 397" (0x0000000004EBF600)
    
    Where the stacks of those 2 threads show:
    
    3XMTHREADINFO      "WebContainer : 397"
    J9VMThread:0x0000000004EBF600,
    j9thread_t:0x000002002E15C290,
    java/lang/Thread:0x0000000140090AA0,
    state:B, prio=5
    3XMTHREADINFO1            (native thread ID:0x3B44, native
    priority:0x5,
    native policy:UNKNOWN)
    3XMTHREADINFO2            (native stack address range
    from:0x0000020037C00000, to:0x0000020037C40000, size:0x40000)
    3XMTHREADINFO3           Java callstack:
    4XESTACKTRACE                at
    com/ibm/ffdc/util/provider/FfdcProvider.getIncident(FfdcProvider
    .java:66
    (Compiled Code))
    4XESTACKTRACE                at
    com/ibm/ffdc/util/provider/Ffdc.<init>(Ffdc.java:60(Compiled
    Code))
    4XESTACKTRACE                at
    com/ibm/ffdc/util/provider/FfdcProvider.getFfdc(FfdcProvider.jav
    a:289(Co
    mpiled Code))
    4XESTACKTRACE                at
    com/ibm/ffdc/util/provider/FfdcProvider.log(FfdcProvider.java:29
    8)
    4XESTACKTRACE                at
    com/ibm/ffdc/impl/Ffdc.log(Ffdc.java:221)
    4XESTACKTRACE                at
    com/ibm/websphere/security/WSSecurityException.printStackTrace(W
    SSecurit
    yException.java:242)
    
    
    3XMTHREADINFO      "WebContainer : 393"
    J9VMThread:0x0000000005103000,
    j9thread_t:0x0000020032F63070,
    java/lang/Thread:0x0000000140090CC0,
    state:B, prio=5
    3XMTHREADINFO1            (native thread ID:0x3B36, native
    priority:0x5,
    native policy:UNKNOWN)
    3XMTHREADINFO2            (native stack address range
    from:0x0000020013400000, to:0x0000020013440000, size:0x40000)
    3XMTHREADINFO3           Java callstack:
    4XESTACKTRACE                at
    com/ibm/ejs/ras/SystemOutStream.logMessage(SystemOutStream.java:
    300(Comp
    iled Code))
    4XESTACKTRACE                at
    com/ibm/ejs/ras/SystemOutStream.processEvent(SystemOutStream.jav
    a:278(Co
    mpiled Code))
    4XESTACKTRACE                at
    com/ibm/ws/logging/WsHandlerWrapper.publish(WsHandlerWrapper.jav
    a:43(Com
    piled Code))
    4XESTACKTRACE                at
    java/util/logging/Logger.log(Logger.java:1109(Compiled Code))
    4XESTACKTRACE                at
    com/ibm/ws/logging/WsLogger.deliverOrBuffer(WsLogger.java:265(Co
    mpiled
    Code))
    4XESTACKTRACE                at
    com/ibm/ws/logging/WsLogger.log(WsLogger.java:230(Compiled
    Code))
    4XESTACKTRACE                at
    com/ibm/ws/logging/WsLogger.logp(WsLogger.java:479(Compiled
    Code))
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V7.0 and V8.0                        *
    ****************************************************************
    * PROBLEM DESCRIPTION: Combining a RAS services logging and    *
    *                      FFDC invocation can result in a         *
    *                      deadlock.                               *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Generally, components should be invoking RAS services and FFDC
    components separately.  However, in this particular case, the
    component is used as an API and needed a mechanism for
    tracking the exceptions with FFDC.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PM41930

  • Reported component name

    WEBSPHERE APP S

  • Reported component ID

    5724J0800

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-06-17

  • Closed date

    2011-09-02

  • Last modified date

    2011-09-02

  • 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

    WEBSPHERE APP S

  • Fixed component ID

    5724J0800

Applicable component levels

  • R700 PSY

       UP

  • R800 PSY

       UP



Document information

More support for: WebSphere Application Server
General

Software version: 7.0

Reference #: PM41930

Modified date: 02 September 2011