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https://issues.apache.org/jira/browse/JAMES-3687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17470544#comment-17470544
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Benoit Tellier commented on JAMES-3687:
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Potential bugs of the current proposal that might need to be addressed:
https://github.com/apache/james-project/pull/808#discussion_r780162174
{code:java}
Clear need to also apply to delayed messages.
We need to make this constraint explicit in the underlying contract tests.
We likely need to clear too the scheduled topic
{code}
Likely super easy to fix.
https://github.com/apache/james-project/pull/808#discussion_r780170243
{code:java}
Clearing expired filters is an optimisation relying on messages being ordered.
Out of order messages, like delayed messages, might make this trivially false.
We could benefit from a test demonstrating the issue. (contract test)
We might have to drop this optimisation.
{code}
Easy to solve.
Impact: ever growing set of deletions...
> Implements Apache Pulsar based Mailqueue
> ----------------------------------------
>
> Key: JAMES-3687
> URL: https://issues.apache.org/jira/browse/JAMES-3687
> Project: James Server
> Issue Type: Improvement
> Components: Queue
> Reporter: Jean Helou
> Priority: Major
>
> An apache pulsar based mailqueue offers a different set of compromises over
> the existing mailqueue implementations:
> pros:
> * pulsar is a distributed queue
> * pulsar offers scheduling facilities making it easier to implement delayed
> queues
> cons:
> * being fully distributed some consistency guarantees cannot be honored for
> flush and filter since the flushing and filtering commands take time to
> propagate in the cluster
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