PQ74399: IIS WEBSERVER LOCKS UP AND RECEIVES 404 ERRORS ON WIN2000 WITH WAS 3.5.6 WHEN ADDHEADER AND SETHEADER FAILS

APAR status
Closed as program error.

Error description
Websphere Application Server V3.5.6 on Windows 2000
MS IIS Webserver V5.0
Websphere is horizonally cloned across two boxes.
After user traffic reaches a peak, IIS locks up and users
 receive 404 errors.
....
Customer ran the iis20.dll debug module from L3 plugin team:
 AddHeader and SetHeader are failing with error 14 (not enough
 storage is available to complete this operation).  So it
 appears that the customer's system is having resource issues.
 This apar will fix that we do not continue processing when the
 add/setheader fails (the debug module included this feature).
 It appears that this will prevent the crash, however it will
 do nothing to resolve the customer's resource issues.
 The request will return with error 500 when the storage error
  is encountered.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All WebSphere Application Server users who   *
*                 use IIS webserver.                           *
****************************************************************
* PROBLEM DESCRIPTION: Setting of plugin specific headers      *
*                      fails but the plugin continues to       *
*                      process the request resulting in 404    *
*                      being returned to the browser instead   *
*                      of error 500.                           *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Under load IIS may experience resource issues causing setheader
and addheader functions to fail.  The plugin was not checking
the return code for these functions so processing continued.
However since these plugin specific headers were not set request
processing eventually fails resulting in 404 being returned to
the browser.  The error that should be returned is error 500.
Problem conclusion
Checked the return code for addheader and setheader functions.
If an error occurs the system error message is logged in the
plugin log and error 500 is returned to the webserver.
Temporary fix Comments
APAR information
APAR number PQ74399
Reported component name WAS BASE 5.0
Reported component ID 5630A3600
Reported release 00W
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2003-05-21
Closed date 2003-05-21
Last modified date 2003-05-21

APAR is sysrouted FROM one or more of the following:
PQ68213

APAR is sysrouted TO one or more of the following:

Modules/Macros
PLUGIN          

Publications Referenced

Fix information
Fixed component name WAS BASE 5.0
Fixed component ID 5630A3600

Applicable component levels
R00W PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 00W
Software edition:
Reference #: PQ74399
IBM Group: Software Group
Modified date: May 21, 2003