WebContainer threads hang and/or missing response data resulting from a forwarded request.
PK72336 resolves the following problem:
WebContainer threads hang and/or missing response data resulting from a forwarded request. For example:
WebContainer threads become unusable after the following exception is logged.
Note that the problems only happen when response data is sent asynchronously. As a result it is possible to prevent the problems by forcing all response data to sent be synchronously. This can be done by setting the webcontainer custom property:
Users of WebSphere Application Server Version 220.127.116.11.
Various issues including hanging threads and missing response data
resulting from a forwarded request.
PK63328 introduced an issue where a http connection can be closed too
early for a response from a forwarded request. Depending on the timing
of when the http connection is closed several different symptoms have
been observed and these include:
- Null pointer exceptions
- Missing response data
- Hanging threads
Other symptoms may also be possible.
Note that the problem only occurs when response data is sent asynchronously and as a result are more likely to occur under load and will not happen when the following WebContainer custom property is set:
One example of a NullPointerException exception resulting from the problem is:
Another example of a NullPointerException exception resulting from the problem is:
The WebContainer has been updated to only close a connection
after the sending of the response data from forward request is
The fix for this APAR is currently targeted for inclusion in fixpacks 18.104.22.168. and 22.214.171.124.
Please refer to the Recommended Updates page for delivery information:
Please download the UpdateInstaller below to install this fix.
Please review the readme.txt for detailed installation instructions.
Contact IBM Support using SR (http://www-306.ibm.com/software/support/probsub.html), visit the WebSphere Application Server Support Web site (http://www.ibm.com/software/webservers/appserv/was/support/), or contact 1-800-IBM-SERV(U.S. only).
15 June 2018