Alan Woodward created SOLR-9659:
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             Summary: Add zookeeper DataWatch API
                 Key: SOLR-9659
                 URL: https://issues.apache.org/jira/browse/SOLR-9659
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Alan Woodward
            Assignee: Alan Woodward


We have several components which need to set up watches on ZooKeeper nodes for 
various aspects of cluster management.  At the moment, all of these components 
do this themselves, leading to large amounts of duplicated code, and 
complicated logic for dealing with reconnections, etc, scattered across the 
codebase.  We should replace this with a simple API controlled by SolrZkClient, 
which should make the code more robust, and testing considerably easier.



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