IBM Support

PM44032: HANG THREADS DURING NODEAGENTR STARTUP DUE TO CONCURRENT ACCESS TO THE HASHMAP.

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

  • In systemout.log:
    [7/15/11 3:20:18:147 EDT] 00000003 ThreadMonitor W   WSVR0605W:
    Thread
    
    "ProcessDiscovery : 5" (0000008c) has been active for 697095
    milliseconds and may be hung.  There is/are 1 thread(s) in total
    in the server that may be hung.
    at java.util.HashMap.findNonNullKeyEntry(HashMap.java:525)
    at java.util.HashMap.getEntry(HashMap.java:510)
    at java.util.HashMap.get(HashMap.java:496)
    at
    com.ibm.ws.management.connector.ipc.ConnectionPoolMgr.getConnect
    ionPool(ConnectionPoolMgr.java:243)
    at
    com.ibm.ws.management.connector.ipc.IPCConnectorClient.<init>(IP
    CConnectorClient.java:228)
    at
    sun.reflect.GeneratedConstructorAccessor48.newInstance(Unknown
    Source)
    at
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Delega
    tingConstructorAccessorImpl.java:39)
    at
    java.lang.reflect.Constructor.newInstance(Constructor.java:516)
    at
    com.ibm.websphere.management.AdminClientFactory.createAdminClien
    tPrivileged(AdminClientFactory.java:988)
    
    Java HashMap class is not thread-safe. Hashmaps are not
    threadsafe intrinsically. So the hang is caused by concurrent
    access to the HashMap. The code making use of the hashmap API
    must make them threadsafe
    

Local fix

  • N?A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V7.0 and V8.0                        *
    ****************************************************************
    * PROBLEM DESCRIPTION: In ConnectionPoolMgr, certain calls,    *
    *                      accessible from multiple threads, are   *
    *                      not protected as synchronized.          *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    In ConnectionPoolMgr, certain calls, accessible from multiple
    threads, are not protected as synchronized when they should be.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PM44032

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-07-19

  • Closed date

    2011-09-16

  • Last modified date

    2011-09-16

  • 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

  • R700 PSY

       UP

  • R800 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":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
27 October 2021