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https://issues.apache.org/jira/browse/HBASE-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12717553#action_12717553
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ryan rawson commented on HBASE-1502:
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right now the master makes assignment decisions during the 'check in' RPC.
Basically the master doesn't proactively assign regions, instead it passively
waits for regionservers to call the master.
We'd also need new RPC so a master can be much more proactive about assigning
regions. This could reduce assignment time by seconds (!).
> Remove need for heartbeats in HBase
> -----------------------------------
>
> Key: HBASE-1502
> URL: https://issues.apache.org/jira/browse/HBASE-1502
> Project: Hadoop HBase
> Issue Type: Wish
> Reporter: Nitay Joffe
> Fix For: 0.20.1
>
>
> 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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