Benoit Tellier created JAMES-3364:
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Summary: DeletedMessageVault: deleting many messages dead-locks
Key: JAMES-3364
URL: https://issues.apache.org/jira/browse/JAMES-3364
Project: James Server
Issue Type: Improvement
Components: mailbox
Affects Versions: 3.6.0
Reporter: Benoit Tellier
== Symptoms
When deleting ~1000 messages at once with the deletedMessage vault enabled, the
deletion dead-locks and never completes.
== Fix
The deleted message vault goup bys deleted entries when retrieving the username
associated with a mailbox (performance purposes) then groups the mailboxIds
together for a given messageId.
These too groupBys steps proved to be failing.
Getting read of the second groupbys eventually solve the dead lock issues.
Drawback: if a message is referenced in several mailboxes at once, we expect it
to be inserted several time in the (indempotent) deleted message vault, leading
to a performance penalty. However this is a rare unexpected corner case, and it
looks like premature optimization.
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