[
https://issues.apache.org/jira/browse/JAMES-3296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17236046#comment-17236046
]
Benoit Tellier commented on JAMES-3296:
---------------------------------------
I conducted some chaos testingregarding RabbitMQ.
This task allows me to recover content published to RabbitMQ - but lost.
However, it do not allow me to recover content published during a RabbitMQ
outage.
Consider:
{code:java}
Given a stopped RabbitMQ,
When I send an email
Then the email send is failing
And the sent email is stuck in Outbox
As an administrator, I want to recover from this outage
I run curl -XPOST
'http://ip:port/mailQueues/spool?action=RepublishNotProcessedMails&olderThan=10s'
And the email is still stuck in Outbox
{code}
Of course I would LOVE to be able to not "loose" such mails...
The reason:
{code:java}
void enQueue(Mail mail) throws MailQueue.MailQueueException {
EnqueueId enqueueId = EnqueueId.generate();
saveMail(mail)
.map(partIds -> new MailReference(enqueueId, mail, partIds))
.flatMap(Throwing.function(this::publishReferenceToRabbit).sneakyThrow())
.flatMap(mailQueueView::storeMail)
.thenEmpty(Mono.fromRunnable(enqueueMetric::increment))
.block();
}
{code}
The publish is done after, thus content is lost during rabbitMQ donwtime....
I we perform the storage in the view in Cassandra simultaneously with the
content publishing in RabbitMQ the above implemented task will allow recovering
**fully** from the outage, which seems like a very desirable behaviour to me!
> Be able to rebuild RabbitMQ MailQueue
> -------------------------------------
>
> Key: JAMES-3296
> URL: https://issues.apache.org/jira/browse/JAMES-3296
> Project: James Server
> Issue Type: Improvement
> Components: Queue, SpoolManager & Processors
> Reporter: Gautier DI FOLCO
> Priority: Major
> Fix For: 3.6.0
>
>
> In order to survive RabbitMQ data-loss, we should be able to rebuild RabbitMQ
> from Cassandra view to be able to continue mail processing.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
