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From "Brent (Jira)" <j...@apache.org>
Subject [jira] [Created] (ZOOKEEPER-4291) ZooInspector has very high latency when operating against remote clusters
Date Sun, 09 May 2021 02:38:00 GMT
Brent created ZOOKEEPER-4291:
--------------------------------

             Summary: ZooInspector has very high latency when operating against remote clusters
                 Key: ZOOKEEPER-4291
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4291
             Project: ZooKeeper
          Issue Type: Improvement
          Components: contrib
    Affects Versions: 3.6.2, 3.8.0, 3.7.1
            Reporter: Brent


The ZooInspector tool performs well when connecting to a Zookeeper cluster on the same host
it is being run on or to a very close host (network-wise).  However, when run against a Zookeeper
cluster that is remote (such as one running in the cloud), the tool exhibits very high latency. 
In my experience, at worst it can takes up to 20-30 seconds between the time a node is expanded
and the time the UI is updated. 

Upon brief inspection, this seems to be due to network calls to Zookeeper being made from
the rendering thread (though this is not entirely clear). 

I will (hopefully) be attempting to create a pull request to remedy this issue, but I wanted
to report it first.



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