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https://issues.apache.org/jira/browse/HBASE-12450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14203087#comment-14203087
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Enis Soztutar commented on HBASE-12450:
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Admin.balancer() may throw some other exception than ServiceException (see
HBASE-12072). So we should just catch Exception there. Other than that looks
good.
> Unbalance chaos monkey might kill all region servers without starting them
> back
> -------------------------------------------------------------------------------
>
> Key: HBASE-12450
> URL: https://issues.apache.org/jira/browse/HBASE-12450
> Project: HBase
> Issue Type: Bug
> Reporter: Virag Kothari
> Assignee: Virag Kothari
> Priority: Minor
> Fix For: 2.0.0, 0.98.8, 0.99.2
>
> Attachments: HBASE-12450-0.98.patch, HBASE-12450.patch,
> HBASE-12450.patch
>
>
> UnbalanceKillAndRebalanceAction does kill, balance and then start of region
> servers. But if the balance fails exception is thrown causing the region
> servers to not start. For me, the balance always kept on failing with socket
> timeout (default 1 min) as master runs one iteration of balance for 5 mins
> (default config). Eventually all servers are killed but never started back.
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