Rob Ryan created OAK-1958:
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Summary: Session.logout performance poor
Key: OAK-1958
URL: https://issues.apache.org/jira/browse/OAK-1958
Project: Jackrabbit Oak
Issue Type: Bug
Components: jcr
Affects Versions: 1.0.1
Environment: linux jdk1.7 b25 and b55.
Reporter: Rob Ryan
Attachments: sessionConcurrencyTest.jar
Problem:
Session.logout was observed to take 14% of time in a performance test of a
reasonably real-world load.
Method:
Use the attached sling junit test case to run 8 concurrent instances of the
test. profile with YourKit or similar and see >50% time taken by logout.
Expected:
Logout should be practically free.
Solution:
The attached patch avoids a bug in guava-15 (still present in guava-17 the
latest) where the former use of addCallback triggered many
CancellationExceptions when sessions were quickly created and logged out.
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