Marshall Schor created UIMA-3642:
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Summary: Reduce class loading synchronized contention
Key: UIMA-3642
URL: https://issues.apache.org/jira/browse/UIMA-3642
Project: UIMA
Issue Type: Improvement
Components: Core Java Framework
Affects Versions: 2.5.0SDK
Reporter: Marshall Schor
Assignee: Marshall Schor
Priority: Minor
Fix For: 2.5.1SDK
In large multithreaded deployment with many annotators, measurements showed
large slowdown in class loading as 100's of annotator classes were loaded,
perhaps in 100's of instances. Each load operation locked 1 shared global
lock. Java 7 implements a finer grained locking for this, so that the lock is
per [ classloader + class-name ], to reduce lock contention. This code will
need to be conditional for Java 7 and later.
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