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PI63745: MESSAGESENTEXCEPTION AND NULLPOINTEREXCEPTION THROWN ON AN WEBSO CKET REQUEST

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APAR status

  • Closed as program error.

Error description

  • com.ibm.ws.webcontainer.channel.WCChannelLink
    finishBufferAsynch SRVE8104E: Internal Server Error. Exception
    Message: [{0}]
    
    com.ibm.wsspi.genericbnf.exception.MessageSentException:
    Message already sent
    
    exception is thrown during Websocket request.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: A WebSocket Upgrade request to the      *
    *                      server may throw a                      *
    *                      "NullPointerException" followed by      *
    *                      "MessageSentException: Message          *
    *                      already sent" .                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    While processing the WebSocket Upgrade request the connection
    is destroyed internally; this causes the request to fail,  and
    the following exceptions are thrown:
    WCChannelLink E com.ibm.ws.webcontainer.channel.WCChannelLink
    finishBufferAsynch SRVE8104E: Internal Server Error. Exception
    Message: [{0}]   java.lang.NullPointerException
    at
    com.ibm.ws.webcontainer.channel.WCChannelLink.finishBufferAsynch
    (WCChannelLink.java:760)
    and
    om.ibm.ws.webcontainer.channel.WCChannelLink
    finishBufferAsynch SRVE8104E: Internal Server Error. Exception
    Message: [{0}]
    com.ibm.wsspi.genericbnf.exception.MessageSentException:
    Message already sent
    

Problem conclusion

  • The WebContainer code was modified to handle the WebSocket
    Upgrade request correctly when the connection is destroyed.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 9.0.0.1.  Please refer to the Recommended Updates
    page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI63745

  • 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

    2016-06-08

  • Closed date

    2016-08-09

  • Last modified date

    2016-08-09

  • 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

  • R900 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"900","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
15 October 2021