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https://issues.apache.org/jira/browse/JAMES-3058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17046112#comment-17046112
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Benoit Tellier commented on JAMES-3058:
---------------------------------------
https://github.com/linagora/james-project/pull/3110 contributes a service to
solve cassandra mailbox object inconsistencies. (without concurrency handling
proposal)
As demonstrated in https://github.com/linagora/james-project/pull/3141, this
work is prone to (unresolvable) concurrency issue that can lead to canceling
legitimate user concurrent actions (with a lower probability with the
concurrency handling proposal). As such, it should be run offline.
Having this service allow to have a way to handle mailbox inconsistencies on
the short term (tactical move).
A strategical move would be to have a valid source of truth (which might
require restructuring the mailbox data model - for example using event
sourcing) and would require further experiments.
> Webadmin task to solve Cassandra Mailbox inconsistencies
> --------------------------------------------------------
>
> Key: JAMES-3058
> URL: https://issues.apache.org/jira/browse/JAMES-3058
> Project: James Server
> Issue Type: Improvement
> Components: mailbox, webadmin
> Reporter: René Cordier
> Priority: Major
>
> You will implement a task whose goal will be to solve any inconsistencies
> that could occur between the `mailbox` table and the `mailboxPath` table in
> Cassandra. You need to solve the following issues :
> * If the mailboxPath exists but not the mailbox => create the corresponding
> mailbox
> * If the mailbox exists but not the mailboxPath => remove the mailbox
> (dangling mailbox that probably didn't get correctly removed)
> * If mailbox has id1/path1 and id2/path2 but mailboxPath only have id1/path1
> => log an error (GhostMailbox issue)
> You can take a look at the similar work that has been done with alias
> mappings.
> You will then expose the task for Cassandra guice products by reusing the
> `/maiboxes` route, you will implement the new following `TaskRegistration` :
> {code:java}
> POST /mailboxes?task=solveInconsistencies
> {code}
> You need to implement as well the proper tests and documentation for it as
> well.
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