Matthieu Baechler created JAMES-3004:
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Summary: Reactor boundedElastic can lead to deadlocks
Key: JAMES-3004
URL: https://issues.apache.org/jira/browse/JAMES-3004
Project: James Server
Issue Type: Bug
Reporter: Matthieu Baechler
Reactor authors advise users to prefer boundedElastic Scheduler to elastic one.
With https://issues.apache.org/jira/browse/JAMES-2899 we decided to use it as
it allows to use less threads.
However, we found that it can lead to deadlocks because of complex starvation
scenarios.
The reality is that James is still calling `block` a lot on Mono/Flux for now
and the advice doesn't stand in the context.
We can either create a boundedElastic for each usages or revert
https://issues.apache.org/jira/browse/JAMES-2899 to workaround that risk
waiting for the day James will be async from end to end.
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