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https://issues.apache.org/jira/browse/JAMES-3721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17501245#comment-17501245
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Benoit Tellier commented on JAMES-3721:
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Hello Jean,
+1 agree with the fix.
> Browse on the Pulsar mailqueue fails with ObjectNotFoundException
> -----------------------------------------------------------------
>
> Key: JAMES-3721
> URL: https://issues.apache.org/jira/browse/JAMES-3721
> Project: James Server
> Issue Type: Bug
> Components: pulsar, Queue
> Reporter: Jean Helou
> Priority: Major
> Labels: Pulsar
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We have identified a couple interrelated issues around the [puslar
> mailqueue|https://issues.apache.org/jira/browse/JAMES-3695] :
> Upon acknowledging a message, the corresponding mime message was not removed
> from the blob store.
> Upon fixing that issue (and adding the corresponding verification), we
> started getting more failures on the browse (the failures could also be
> observed on the remove).
>
> Because of how pulsar works and because we allow parallel processing of
> messages, the browse operation can end up reading meta data of messages that
> have been removed or acknowledged. The metadata of acknowledged messages is
> not immediately purged from pulsar. It is somewhat configurable but for a
> normally operating cluster acked messages can [remain readable for
> hours|https://pulsar.apache.org/docs/en/cookbooks-retention-expiry/#delete-messages-from-namespaces]
> (and forcing that to the order of seconds would badly affect the cluster
> operation)
>
> We chose to catch the specific exception and simply ignore the corresponding
> mails during the browse operation.
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