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https://issues.apache.org/jira/browse/FLINK-14199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-14199:
-----------------------------------
    Labels: pull-request-available  (was: )

> Only use dedicated/named classes for mailbox letters.
> -----------------------------------------------------
>
>                 Key: FLINK-14199
>                 URL: https://issues.apache.org/jira/browse/FLINK-14199
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Task
>            Reporter: Arvid Heise
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: Screenshot 2019-08-22 at 12.59.59.png
>
>
> Unnamed lambdas make it difficult to debug the code
>  !Screenshot 2019-08-22 at 12.59.59.png! 
> Note: there are cases of the mailbox usage that need a Future to track when a 
> letter is executed and get success/exception result. Current implementation 
> (in MailboxExecutor) piggybacks on java.util.concurrent.FutureTask and the 
> fact that it implements Java Executor api.



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