https://issues.apache.org/bugzilla/show_bug.cgi?id=52091
Bug #: 52091
Summary: TagHandlerPool is slow when high concurrently
Product: Tomcat 7
Version: 7.0.19
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
AssignedTo: dev@tomcat.apache.org
ReportedBy: buzz.ta...@gmail.com
Classification: Unclassified
TagHandlerPool is slow when I ran stress test my web application using tomcat7.
It occured in 7.0.19.
Profiler said that it causes are followings:
1. Lock of log instance at org.apache.jasper.runtime.TagHandlerPool.
2. Lock of parameters field at
org.apache.catalina.core.StandardWrapper.getInitParameter.
An attached patch resolve this issue in my environment.
It makes following changes:
1. Makes log field to static.
2. At StandardWrapper, changes lock policy from synchronized block to
ReentrantReadWriteLock.
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