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List:       axis-dev
Subject:    [jira] [Commented] (AXIS2-5118) In high load scenarios with many
From:       "Hudson (Commented) (JIRA)" <jira () apache ! org>
Date:       2011-10-28 22:24:33
Message-ID: 332332010.34211.1319840673227.JavaMail.tomcat () hel ! zones ! apache ! org
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    [ https://issues.apache.org/jira/browse/AXIS2-5118?page=com.atlassian.jira.plugin. \
system.issuetabpanels:comment-tabpanel&focusedCommentId=13138859#comment-13138859 ] 

Hudson commented on AXIS2-5118:
-------------------------------

Integrated in Axis2 #1085 (See [https://builds.apache.org/job/Axis2/1085/])
    AXIS2-4524 / AXIS2-4878 / AXIS2-5118 / AXIS2-5119: Also implement \
BeanInfoCachingClassLoader on JarFileClassLoader so that the cache works in all \
deployment scenarios.

veithen : 
Files : 
* /axis/axis2/java/core/trunk/modules/kernel/src/org/apache/axis2/classloader/JarFileClassLoader.java


                
> In high load scenarios with many threads, the call to \
> Introspector.getBeanInfo(Class,Class) causes high synchronization resulting in \
>                 system stall
> -------------------------------------------------------------------------------------------------------------------------------------------------
>  
> Key: AXIS2-5118
> URL: https://issues.apache.org/jira/browse/AXIS2-5118
> Project: Axis2
> Issue Type: Improvement
> Components: adb
> Affects Versions: 1.5.4
> Environment: Tomcat 7 with axis2 webservices
> Reporter: Ronald Brindl
> Assignee: Andreas Veithen
> Fix For: 1.6.2, 1.7.0
> 
> Attachments: BeanInfoCache.java, BeanInfoCacheTest.java, BeanUtil.java
> 
> 
> I have a high load scenario, where a Clustered Web frontend does Webservice calls \
> to a Backend Webservices.  There are around 200 Threads handling the webservices.
> The CPU load of the machine went to near zero.
> Using dynatrace, we realized, that all the calls went through \
> BeanUtils.getPropertyQnameList, which in turn calls \
> Introspector.getBeanInfo(beanClass, beanClass.getSuperclass()); This again calls \
> WebAppClassLoader.loadClass(String name, boolean resolve), which is synchronized. I \
> fixed this problem by modifying BeanUtil.getPropertyQnameList so that it caches \
> BeanInfo objects.

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