PK04258: DATA CORRUPTION WHEN GZIP COMPRESSION IS ENABLED IN HTTP

6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for AIX platforms
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for HP-UX platforms
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for Solaris platforms
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for Windows platforms
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for Linux platforms

APAR status

• Closed as program error.

Error description

• When gzip compression is enabled in the Application Server, the
  bodies of the HTTP messages may become corrupted during the
  decompression stage.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: WebSphere Application Server version 6       *
  *                 HTTP users with gzip compressed messages.    *
  ****************************************************************
  * PROBLEM DESCRIPTION: If gzip compression is enabled, then    *
  *                      the steps to compress or decompress the *
  *                      HTTP body data may corrupt that data.   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An error in the pooling of Inflator and Deflator objects meant
  that there was a possibility of multiple threads using the
  same object at once. That would cause different input or output
  streams to get intermixed and the compress/decompress attempts
  to fail.
  

Problem conclusion

• Pooling has been fixed so that the multithreaded corruption is
  no longer possible.
  
  This fix is targeted for fixpack 6.0.1.2.
  Please refer to the recommended updates page for delivery
  information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  
  Application Server for z/OS customers should follow their
  normal PTF ordering process. Please refer to the support
  page download section for additional PTF information:
  http://www-306.ibm.com/software/webservers/appserv/
  zos_os390/support/
  

Temporary fix

Comments

APAR Information

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

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• CHANNEL
  

Fix information

• Fixed component name

  WEBSPH APP SERV

• Fixed component ID

  5724J0800

Applicable component levels

• R60A PSY

     UP

• R60H PSY

     UP

• R60I PSY

     UP

• R60P PSY

     UP

• R60S PSY

     UP

• R60W PSY

     UP

• R60Z PSY

     UP