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) 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.(StringBuffer.java:119)[2], java.lang.StringBuffer.(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 known Problem 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/pq60755/355 Comments
APAR information | APAR number | PQ60755 | Reported component name | WAS ADVANCED SU | Reported component ID | 5648C8402 | Reported release | 350 | Status | CLOSED PER | PE | NoPE | HIPER | NoHIPER | Submitted date | 2002-05-02 | Closed date | 2002-05-07 | Last modified date | 2002-05-09 |
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:APAR is sysrouted FROM one or more of the following:
PQ60908
Modules/Macros APAR is sysrouted TO one or more of the following:PQ60908Modules/Macros
|
Fix information |
Fixed component name | WAS ADVANCED SU | Fixed component ID | 5648C8402 |
Applicable component levels | R350 PSY | UP |
|