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

Fixes are available

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

Disable AIO by following the directions here:
http://www-01.ibm.com/support/docview.wss?uid=swg21366862

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

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 April 2022

Tips

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

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R700 PSY

R800 PSY

R850 PSY

Document Information

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