IBM Support

PI25221: A POTENTIAL PERFORMANCE ISSUE WITH ODR/PROXY ON MICROSOFT WINDOWS

Fixes are available

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
7.0.0.37: 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

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • While using the on-Demand Router (ODR) or Proxy on Microsoft
    Windows a performance issue could happen
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  IBM WebSphere Application Server Version    *
    *                  7.0.0.33, 8.0.0.9, 8.5.5.3 users on         *
    *                  Microsoft Windows with the Asynchronous     *
    *                  Input/Output(AIO) library enabled.          *
    ****************************************************************
    * PROBLEM DESCRIPTION: On Microsoft Windows the ODR or Proxy   *
    *                      could slow down.                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    While processing timeouts the server might slow down because
    of a wait introduced in and caused by APAR PI16250 and
    PI15453. This could end up causing hung threads.
    

Problem conclusion

  • The AIO library was modified to not wait as long. Also, a
    custom property was introduced to change the timeout behavior
    to be what it was prior to integrating PM95795. The new
    property is:
    
    
    
    AIONewWindowsCancelPath
    
    
    
    The possible values are 0 or 1, with the default being 0. The
    following are descriptions of the two options:
    
    0 - This mode tells the library to wait for 50 milliseconds
    before trying the operation again
    
    1 - This mode tells the code to behave as it was prior to
    PM95795
    
    The property must be set as a generic JVM property.
    Instructions on how to do that can be found here:
    
    
    
    http://www-01.ibm.com/support/docview.wss?uid=swg21417365
    
    When setting the property it should look like this:
    -DAIONewWindowsCancelPath=#, where # is the number you want to
    set
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 7.0.0.37, 8.0.0.10 8.5.5.4.  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

    PI25221

  • 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

    2014-09-08

  • Closed date

    2014-10-13

  • Last modified date

    2014-10-13

  • 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 #: PI25221

Modified date: 13 October 2014