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From afine <...@git.apache.org>
Subject [GitHub] zookeeper issue #273: ZOOKEEPER-2795 Change log level for "ZKShutdownHandler...
Date Fri, 17 Nov 2017 21:11:24 GMT
Github user afine commented on the issue:

    @phunt I'm trying to understand the problem you are describing. Please let me know what
I am missing.
    Since `QuorumZooKeeperServer` reimplements `setState` without `ZooKeeperServerShutdownHandler`
 I think this is only an issue when dealing with standalone ZooKeeper servers. 
    Standalone servers are only instantiated (outside of tests) in `ZooKeeperServerMain#runFromConfig`
(which also does the work of setting the `ZooKeeperServerShutdownHandler`).
    In other words, I think we are dealing with an unfortunate usage of inheritance. It would
be ideal to add this `ZooKeeperServerShutdownHandler` in a subclass of `ZooKeeperServer` used
only for standalone purposes but it looks like we did the opposite, putting in the `ZooKeeperServerShutdownHandler`
in the default case and reimplementing `setState` for the purpose of ignoring the `ZooKeeperServerShutdownHandler`
it in `QuorumZooKeeperServer`. 
    When the `ZooKeeperServerShutdownHandler` is needed it is always set (in production code).

    So I guess my question is, what problem would an operator be debugging with this log message?


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