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PI57884: Blocking write is not allowed once WriteListener is enabled.

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APAR status

  • Closed as program error.

Error description

  • The application is able to write from resource which
    initiated the WriteListener as well as blocking write is
    allowed from the listener. Both these should not be allowed
    once WriteListener is enabled.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server Liberty Profile - Web Container      *
    ****************************************************************
    * PROBLEM DESCRIPTION: Blocking write is not allowed once      *
    *                      WriteListener is enabled.               *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The application is able to perform a blocking write from a
    resource which initiated the WriteListener. A blocking write is
    allowed from the WriteListener as well. These should not be
    allowed once WriteListener is enabled.
    Also when the OutputStream is closed write(), isReady() ,
    setWriteListener() APIs must not be invoked since these can
    cause IOException to be thrown. WebConnection close() must also
    check if the OutputStream has been closed.
    

Problem conclusion

  • The Webcontainer code is is updated to make sure the blocking
    write is not allowed once WriteListener is enabled. Once
    OutputStream is closed write(), isReady() , setWriteListener()
    APIs will return immidiately and WebConnection close() will also
    check if OutputStream is closed.
    
    The fix for this APAR is currently targeted for inclusion in fix
    pack 8.5.5.9.  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

    PI57884

  • Reported component name

    WAS LIBERTY COR

  • Reported component ID

    5725L2900

  • Reported release

    855

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-02-23

  • Closed date

    2016-02-24

  • Last modified date

    2016-02-24

  • 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

    WAS LIBERTY COR

  • Fixed component ID

    5725L2900

Applicable component levels

  • R855 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSD28V","label":"WebSphere Application Server Liberty Core"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"855","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
14 October 2021