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https://issues.apache.org/jira/browse/JAMES-2009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16262045#comment-16262045
 ] 

Tellier Benoit commented on JAMES-2009:
---------------------------------------

The concurrency problem is due to the use of "ArrayList"

It happens only with Cassandra implementation because all other implementation 
relies on the JVM pathLocker.

Quynh also noticed some performance related timeouts. We may consider 
decreasing the number of concurrent runners.

> Fix unstable CassandraMailboxManagerStressTest
> ----------------------------------------------
>
>                 Key: JAMES-2009
>                 URL: https://issues.apache.org/jira/browse/JAMES-2009
>             Project: James Server
>          Issue Type: Bug
>          Components: Build System
>            Reporter: Antoine Duprat
>




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