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https://issues.apache.org/jira/browse/ACCUMULO-2757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Newton updated ACCUMULO-2757:
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Summary: millions of zookeeper watches (was: zookeeper watches)
> millions of zookeeper watches
> -----------------------------
>
> Key: ACCUMULO-2757
> URL: https://issues.apache.org/jira/browse/ACCUMULO-2757
> Project: Accumulo
> Issue Type: Improvement
> Components: client, master, tserver
> Environment: very large clusters
> Reporter: Eric Newton
>
> I recently learned how to get the number of watches in a zookeeper node.
> {noformat}
> $ echo wchp | nc localhost 2181
> {noformat}
> There are a surprising number of watches supporting table configuration. A
> single tserver accumulo instance with one data table is using 872 watches.
> Large clusters, even with many zookeepers, can have millions of watches.
> We may need to watch a single notification node, or serialize the table
> configs into a single node per table. That would accomplish ACCUMULO-1568,
> too.
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