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PM76903: WLM OUTBOUND PROXY CONNECTION USES WRONG IP ADDRESS

Fixes are available

8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
8.5.5.2: WebSphere Application Server V8.5.5 Fix Pack 2
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.5.5.3: WebSphere Application Server V8.5.5 Fix Pack 3
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
7.0.0.45: 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
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14

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APAR status

  • Closed as program error.

Error description

  • There exists code in the WebSphere Proxy server that is invoked
    when a failed request happens to try and determine the health
    of the target the request was sent to.  This is accomplished by
    sending a simple HEAD / request to the same target host/port as
    the request.  However, the health monitor code uses the default
    outbound IP address for the machine, which means if the machine
    is configured with a different outbound IP address than the
    default for that physical machine, the customized IP address
    will not be used when the HealthMonitor attempts to connect to
    the remote target.
    
    This APAR addresses the issue by putting the Health Monitor
    code in line with the rest of the Proxy routing code to make
    use of the configured IP address versus the default IP address
    for the outbound local connection.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: The Workload Management(WLM) health     *
    *                      monitor in the proxy uses the           *
    *                      machine's default outbound IP address   *
    *                      rather than the outbound IP address     *
    *                      configured in the proxy.                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    In the WebSphere Proxy server, after a failed request the
    proxy server tries to determine the health of the target of
    the request.  This is accomplished by sending a HEAD request
    to the same target host/port as the request.  However the WLM
    health monitor code in the proxy uses the default outbound IP
    address for the machine rather than the outbound IP address
    configured in the proxy server.  So if the proxy server is
    configured with a different outbound IP address than the
    default for that physical machine, the proxy server's
    configured outbound IP address will not be used by the WLM
    health monitor.
    

Problem conclusion

  • This APAR addresses the issue by putting the Health Monitor
    code in line with the rest of the Proxy routing code to make
    use of the configured IP address versus the default IP address
    for the outbound connection.
    
    APAR PM76903 is currently targeted for inclusion in Fix Packs
    7.0.0.28, 8.0.0.8, and 8.5.5.2 of WebSphere Application
    Server. 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

    PM76903

  • 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

    2012-11-12

  • Closed date

    2013-07-25

  • Last modified date

    2014-03-20

  • 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

  • R850 PSY

       UP



Document information

More support for: WebSphere Application Server
General

Software version: 7.0

Reference #: PM76903

Modified date: 20 March 2014