PQ89799: DELAY FROM THE WAS HTTP TRANSPORT FROM SENDING BACK AN ACK. | |||||||||||||||||||||||||||||||||||||||||||
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![]() APAR status Closed as program error. Error description A delay from the WAS HTTP transport from sending back ACK is creating a performance problem. Initially seeing a 300 ms delay when the request went to the HTTP in IHS and ASDisableNagle was set to true.Local fix Problem summary **************************************************************** * USERS AFFECTED: All users of WebSphere Application Server * * V5.0 for z/OS * **************************************************************** * PROBLEM DESCRIPTION: Perfomance issues with Servlet flush() * * support on z/OS. * **************************************************************** * RECOMMENDATION: * **************************************************************** After support was added for the servlet API flush() method, it was determined that several Web Container flush() calls are made when driving chained or forwarded servlets. These internal flush() calls were causing unnecessary traffic between the Controller and Servant regions. In addition, the Servlet API isCommmitted() call was always returning false with Servlet Caching enabled on the Web Container.Problem conclusion The Web Container has been changed to suppress its internal flush() calls. Response data will be buffered until an application flush() call is made, or the response buffer size limit is reached, or the servlet's service method exits. In addition, the Servlet API isCommitted() call has been modified to return the correct value when Servlet Caching is in effect. APAR PQ89799 is associated with SERVICE LEVEL W502012 of WebSphere Application Server V5.0 for z/OS.Temporary fix Comments ž**** PE04/10/11 FIX IN ERROR. SEE APAR PQ95568 FOR DESCRIPTION
APAR is sysrouted FROM one or more of the following: APAR is sysrouted TO one or more of the following: Modules/Macros
Publications Referenced
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Document Information |
Current web document: swg1PQ89799.html
Product categories: Software > Application Servers >
Distributed Application & Web Servers > WebSphere Application
Server for z/OS
Operating system(s):
Software version: 500
Software edition:
Reference #: PQ89799
IBM Group: Software Group
Modified date: Oct 28, 2004
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