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https://issues.apache.org/jira/browse/JAMES-3700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthieu Baechler closed JAMES-3700.
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> Dead letter policy for the Pulsar MailQueue
> -------------------------------------------
>
> Key: JAMES-3700
> URL: https://issues.apache.org/jira/browse/JAMES-3700
> Project: James Server
> Issue Type: Sub-task
> Components: pulsar, Queue
> Affects Versions: master
> Reporter: Benoit Tellier
> Priority: Major
> Fix For: 3.9.0
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> Currently the Pulsar MailQueue do not come up with a dead-letter policy.
> A bad JSON payload halts the processing.
> This makes the Pulsar MailQeue brittle:
> - The ability to inject a single message with a bad payload can cause an
> entire James cluster to come to a halt.
> - Could be seen as an attack vector
> - But also any changes to the underlying JSON schema for payloads is
> susceptible to cause major downtime.
> We should define a deadletter policy:
> - Given a number of failures delivery of the message would be abandonned
> - And moved to a dead-letter topic for later audit (prevent data loss)
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