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https://issues.apache.org/jira/browse/IMPALA-12156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17725241#comment-17725241
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Zhi Tang commented on IMPALA-12156:
-----------------------------------
The leader election process for catalog HA can be delegated to statestore.
However, who would be the best candidate to handle the statestore HA? I'm not
sure if delegating the leader election process for catalog HA to statestored is
the best option. Would implementing automatic failover based on Apache
ZooKeeper, like HDFS's NN HA, be a better choice?
> Support Impala Statestore HA
> ----------------------------
>
> Key: IMPALA-12156
> URL: https://issues.apache.org/jira/browse/IMPALA-12156
> Project: IMPALA
> Issue Type: New Feature
> Affects Versions: Impala 4.1.2
> Reporter: Zhi Tang
> Priority: Major
>
> The Impala component known as the StateStore checks on the health of all
> Impala daemons in a cluster, and continuously relays its findings to each of
> those daemons. If the StateStore is not running or becomes unreachable, the
> cluster becomes less robust and metadata becomes less consistent as it
> changes. Therefore, implementing high availability for the Statestore is
> essential for the stability of the cluster.
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