IBM Support

PH30163: WEBSOCKET WRITE THREAD COULD SPIN INDEFINITELY ON RACE CONDITION

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APAR status

  • Closed as program error.

Error description

  • WebSocket write thread could spin indefinitely on race
    condition
    
    Needed in tWAS 9.5.0.3 and above and tWAS 9.0.0.11,
    it basically supercedes PH18898. There is an issue for a hard
    to hit race condition.
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: WebSocket write thread(s) could         *
    *                      spin/hang indefinitely on hard to hit   *
    *                      race condition                          *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Threads appear to be hung when doing websocket write calls,
    this can most easily be seen when looking at a javacore.
    

Problem conclusion

  • The race condition was fixed via a simple code addition.
    
    The fix for this APAR is targeted for inclusion in fix pack
    9.0.5.7. For more information, see 'Recommended Updates
    for
    WebSphere Application Server':
    https://www.ibm.com/support/pages/node/715553
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH30163

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2020-10-02

  • Closed date

    2020-12-16

  • Last modified date

    2021-01-28

  • 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

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"900"}]

Document Information

Modified date:
29 January 2021