Till Rohrmann created FLINK-12122:
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Summary: Spread out tasks evenly across all available registered
TaskManagers
Key: FLINK-12122
URL: https://issues.apache.org/jira/browse/FLINK-12122
Project: Flink
Issue Type: Sub-task
Components: Runtime / Coordination
Affects Versions: 1.7.2, 1.6.4, 1.8.0
Reporter: Till Rohrmann
Fix For: 1.7.3, 1.9.0, 1.8.1
With Flip-6, we changed the default behaviour how slots are assigned to
{{TaskManages}}. Instead of evenly spreading it out over all registered
{{TaskManagers}}, we randomly pick slots from {{TaskManagers}} with a tendency
to first fill up a TM before using another one. This is a regression wrt the
pre Flip-6 code.
I suggest to change the behaviour so that we try to evenly distribute slots
across all available {{TaskManagers}} by considering how many of their slots
are already allocated.
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