Tran Hong Quan created JAMES-4033:
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Summary: Option for EventBus to not propagate error when already
store failed event in Dead Letter
Key: JAMES-4033
URL: https://issues.apache.org/jira/browse/JAMES-4033
Project: James Server
Issue Type: Improvement
Components: eventbus, rabbitmq
Reporter: Tran Hong Quan
## Why
Today given e.g. RabbitMQ is down, EventBus can not dispatch the event to
RabbitMQ, and it would persist the event into the dead letter (in the
database).
Today even when the event is stored in the dead letter, EventBus still
propagates the error back and fails the original caller IMAP APPEND or IMAP
STORE for example (while the mail is stored and just Added event has not been
processed yet while being in dead letters).
Given today we are more or less robust on auto reprocessing the failed event
(from event dead letters), we could consider not propagating the error back and
failing the original call.
## How
Add a boolean configuration entry in `rabbitmq.properties` to enable/disable
EventBus error propagation upon storing failed events in dead letters.
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