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From StephanEwen <...@git.apache.org>
Subject [GitHub] flink issue #3539: Flip1: fine gained recovery
Date Mon, 20 Mar 2017 15:26:56 GMT
Github user StephanEwen commented on the issue:

    @shuai-xu Had a look at the changes. In general, I like the decoupling of failover handling
from the execution graph.
    Some suggestions:
      - How about we rename the `FailoverCoordinator` to `FailoverStrategy`?
      - We should probably implement one very simple failover strategy (restart all) and one
better one (failover region based). That has the advantage of having a default implementation
that is simple and robust (same as now) for all conservative users.
      - I would suggest to let commands like `fail()` and `cancel()` that go directly to the
`ExecutionGraph` stay on the execution graph. They are meant to apply the whole graph and
not be specially handled. The failover coordinator could only handle failures from individual

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