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https://issues.apache.org/jira/browse/HBASE-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969083#action_12969083
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Jonathan Gray commented on HBASE-1502:
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We're also using the regionServerStartup or regionServerReport to determine an
RS is online (we use the ZK node to determine when it dies). This stuff would
also need some cleanup/rework to completely drop heartbeats.
> Remove need for heartbeats in HBase
> -----------------------------------
>
> Key: HBASE-1502
> URL: https://issues.apache.org/jira/browse/HBASE-1502
> Project: HBase
> Issue Type: Wish
> Reporter: Nitay Joffe
> Fix For: 0.92.0
>
>
> HBase currently uses heartbeats between region servers and the master,
> piggybacking information on them when it can. This issue is to investigate if
> we can get rid of the need for those using ZooKeeper events.
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