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https://issues.apache.org/jira/browse/JAMES-2605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17138478#comment-17138478
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Ioan Eugen Stan commented on JAMES-2605:
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Is this still an issue?
I read some performance benchmarks you guys did and it seemed to work just fine
now.
Can we close the issue?
> Cassandra MailQueue implementation has a 20% fail rate on load
> --------------------------------------------------------------
>
> Key: JAMES-2605
> URL: https://issues.apache.org/jira/browse/JAMES-2605
> Project: James Server
> Issue Type: Bug
> Components: cassandra
> Reporter: Matthieu Baechler
> Priority: Major
>
> RabbitMQ + Cassandra implementation of Mailqueue proved to be brittle, we
> have around 20% error rate for SMTP mail delivery under heavy load.
> It's probably linked to the heavy use of parallelism into Cassandra Mailqueue
> code that can submit an unbounded numer of request for a single Mailqueue
> operation.
>
> We should try to remove this unbounded parallelism and check the failure rate
> under load.
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