PQ55344: ALTHOUGH SERVLET RELOADING IS NOT SUPPORTED FOR V4.0, IT IS NOT DISABLED AND CAUSES A PERFORMANCE DEGRADATION | |||||||||||||||||||||||||||||||||||||||||
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![]() APAR status Closed as program error. Error description Performance is degraded in WebSphere Application Server Version 4.0 for z/OS and OS/390. This is due to class reloading being enabled at a 3-second interval, by default, even though servlet reloading is not supported for V4.0.Local fix Problem summary **************************************************************** * USERS AFFECTED: All users of WebSphere Application Server * * Version 4.0 for z/OS and OS/390. * **************************************************************** * PROBLEM DESCRIPTION: Although servlet reloading is not * * supported, the reloading function in * * the Web container of WebSphere * * Application Server Version 4.0 for z/OS * * and OS/390 is, by default, enabled and * * occurs at 3-second intervals. This * * causes a performance degradation. * **************************************************************** * RECOMMENDATION: * **************************************************************** The servlet reloading function that existed in previous versions of the Application Server is not supported for Version 4.0 for z/OS and OS/390. WLM commands are now used to refresh servlets without causing an interruption of service. However, the reloading function is not currently disabled, causing a significant performance degradation for the Web container. A timer thread checks every three seconds for classes needing to be reloaded. If any class needs to be reloaded, all classes currently loaded in the Web application's class loader are reloaded. This causes significant overhead. Class reloading is disabled in Version 4.0.1, and needs to be disabled in Version 4.0.Problem conclusion The WebSphere Application Server Version 4.0 for z/OS and OS/390 is changed to fully disable servlet reloading to improve the performance of the Web container. The following COMPID is affected by these changes: 5655A9800 R400 on z/OS and OS/390. The code changes are stored in CMVC under defect 79101. 400Y EJSJWCWC * Cross Reference between External and Internal NamesTemporary fix Comments
APAR is sysrouted FROM one or more of the following: APAR is sysrouted TO one or more of the following: Modules/Macros
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Document Information |
Product categories: Software > Application Servers >
Distributed Application & Web Servers > WebSphere Application
Server for z/OS
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ55344
IBM Group: Software Group
Modified date: Jan 3, 2002
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