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From "Christopher Tubbs (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-3860) Investigate ZK watcher count
Date Wed, 01 Jun 2016 19:18:59 GMT


Christopher Tubbs commented on ACCUMULO-3860:

When I've asked [~ecn] about this test in the past, he basically indicated to me that we don't
really have a good way to predict how many there should be, and that the test was just a sanity
check to ensure we didn't do something to cause it to shoot way up without noticing, and that
it may need to be adjusted over time if it doesn't reflect how many we're using.

So, I don't think that the fact that it got about 600 is really a problem. It probably just
means the test isn't a good test.

> Investigate ZK watcher count
> ----------------------------
>                 Key: ACCUMULO-3860
>                 URL:
>             Project: Accumulo
>          Issue Type: Task
>          Components: zookeeper
>    Affects Versions: 1.7.0
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>             Fix For: 1.7.3, 1.8.1
> Noticed in ACCUMULO-3858 that the number of ZK watchers was sometimes being reported
larger than expected.
> WatchTheWatchCountIT expected the watchers to be between 500 and 600, but, in debugging
the test, I saw it sometimes above 600. Other times, it was happily in the expected range.
> Need to investigate to make sure nothing fishy is going on and we have a good understanding
of how many watchers we are setting.
> cc/ [~ecn]

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