JMAP - fault tolerance when Redis down

[vttranlina]

Why

When setting event.bus.keys.choice=redis in queue.properties file. If Redis is down, the method Email/set + EmailSubmission/set is waiting response for a long time

It is not good for the client Ref https://github.com/linagora/tmail-backend/issues/1013

How

• Set the default timeout to 5 seconds. It can be configurable via jmap.properties
• Ignore the dispatch event via Redis in this failure time.
• Re-lookup other methods that are similarly affected.

Dod

• Integration test
• Document

[chibenwa]

Ignore the dispatch event via Redis in this failure time.

I would like this to be configurable please

[quantranhong1999]

How about configuring it in the redis.properties or queue.properties something like event.bus.keys.failure.ignore=true? And ignore the error directly in the EventBus.

If we catch and handle the error in the higher layer e.g. JMAP for example, I think it is harder to track all places where we are calling the dispatch.

[vttranlina]

I would like this to be configurable please

The default value is yes?

[chibenwa]

event.bus.keys.failure.ignore=true

Yes precisely what I have in mind. IMO in redis.properties.

[chibenwa]

The default value is yes?

Until we are really sure we want this by default, then keep false as a default value please.

[vttranlina]

pr https://github.com/linagora/tmail-backend/pull/1026