Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/1962
I took a quick look at this. I am wondering if this actually needs an extra
timer service for retries.
Can this be solved without a timer? The failures could be detected in the
`invoke(...)` method, and the retry done directly there (with some minimal
backoff or so).
Triggering asynchronous timers is very complex and easily creates leaks,
races, or leftover work / tasks at shutdown.
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