PQ60908: JSP 1.1 PERFORMED SLOWER THAN JSP 1.0 WHEN HUGE WEB APP CLASSPATH WAS CONFIGURED. | |||||||||||||||||||||||||||||||||||||
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APAR status Closed as program error. Error description After changing from JSP 1.0 to JSP 1.1 the customer realized that performance was slower. The customer has a large number of JAR files in their Web Application's classpath. It was also determined that the jar files were had a large file size. some JAR files were over 4 meg. While under a stress test it was determined that a large number of threads were in classloader routines such as the threads below: "Worker#18" (TID:0x10fb910, sys_thread_t:0x10fb848, state:MW, thread_t: t@80, threadID:0xe4e51dc0, stack_bottom:0xe4e52000, stack_size:0x20000) prio=5 [1] java.util.Vector$1.nextElement(Vector.java) [2] com.ibm.servlet.classloader.DynamicClassLoader.getClassPath (DynamicClassLoader.java:203) [3] com.ibm.servlet.classloader.PowerClassLoader.getClassPath (PowerClassLoader.java:169) [4] com.ibm.servlet.engine.srt.WebGroup.getExtendedClasspath (WebGroup.java:552) [5] com.ibm.servlet.engine.srt.WebGroup.getClasspath (WebGroup.java:557) [6] com.ibm.servlet.engine.webapp.WebApp.getClasspath (WebApp.java:204) "Worker#15" (TID:0x10bc8e8, sys_thread_t:0x10bc820, state:R, thread_t: t@70, threadID:0xe5061dc0, stack_bottom:0xe5062000, stack_size:0x20000) prio=5 [1] java.lang.StringBuffer.<init>(StringBuffer.java:119) [2] java.lang.StringBuffer.<init>(StringBuffer.java:134) [3] com.ibm.servlet.classloader.DynamicClassLoader.getClassPath (DynamicClassLoader.java:203) [4] com.ibm.servlet.classloader.PowerClassLoader.getClassPath (PowerClassLoader.java:169) [5] com.ibm.servlet.engine.srt.WebGroup.getExtendedClasspath (WebGroup.java:552) [6] com.ibm.servlet.engine.srt.WebGroup.getClasspath (WebGroup.java:557) [7] com.ibm.servlet.engine.webapp.WebApp.getClasspath (WebApp.java:204)Local fix none knownProblem summary **************************************************************** * USERS AFFECTED: WebSphere Application Server Developers * * migrating from jsp 1.0 to jsp 1.1. * **************************************************************** * PROBLEM DESCRIPTION: Performance degradation when * * migrating application code from jsp * * 1.0 to jsp 1.1. * **************************************************************** * RECOMMENDATION: * **************************************************************** Performance degradation when migrating to jsp 1.1 from jsp 1.0 due to the number of calls made to getClassPath() during each request.Problem conclusion Modified the JSP Processor to move the call to getClassPath() from each request to JSP Processor initialization.Temporary fix //wasdoc0/apars/pq60755/355Comments
APAR is sysrouted FROM one or more of the following: PQ60755 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 > General
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ60908
IBM Group: Software Group
Modified date: May 13, 2002
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