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https://issues.apache.org/jira/browse/JAMES-3687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17472650#comment-17472650
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Jean Helou commented on JAMES-3687:
-----------------------------------

all these already have a wait time built in to account for the eventual 
consistency  of remove

 
 * verride public void awaitRemove() \{ try { Thread.sleep(100); } catch (
 * InterruptedException e) \{ throw new RuntimeException(e); } }

However as usual with fixed wait time maybe this is too short. There is no API 
to observe applicable delete filters and I'm not sure it's a good idea. 
Two options here:

 
 * derive the wait time from ENV defaulting to 100ms, so the 100 can be 
overriden for CI
 * change all the tests assertions to use Awaitility... and wait for eventual 
consistency

> Implements Apache Pulsar based Mailqueue
> ----------------------------------------
>
>                 Key: JAMES-3687
>                 URL: https://issues.apache.org/jira/browse/JAMES-3687
>             Project: James Server
>          Issue Type: Sub-task
>          Components: Queue
>            Reporter: Jean Helou
>            Priority: Major
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
>
> An apache pulsar based mailqueue offers a different set of compromises over 
> the existing mailqueue implementations:
> pros:
>  * pulsar is a distributed queue
>  * pulsar offers scheduling facilities making it easier to implement delayed 
> queues
> cons:
>  * being fully distributed some consistency guarantees cannot be honored for 
> flush and filter since the flushing and filtering commands take time to 
> propagate in the cluster



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