Lock contention in PerthreadManagerImpl
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Key: TAP5-945
URL: https://issues.apache.org/jira/browse/TAP5-945
Project: Tapestry 5
Issue Type: Bug
Components: tapestry-core
Affects Versions: 5.1.0.5
Reporter: Olle Hallin
Priority: Minor
When load testing our new high-volume site before soft launch, we found that we
have severe lock contention in
org.apache.tapestry5.ioc.internal.services.PerthreadManagerImpl.
It synchronizes on "this" before invoking ThreadLocal.get() and
ThreadLocal.remove(), which I believe is unnecessary.
During our tests, approximately 35% of all Tomcat threads were waiting for
this lock in any of 10 thread dumps taken 15 seconds apart.
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