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https://issues.apache.org/jira/browse/HBASE-21480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16690395#comment-16690395
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Duo Zhang commented on HBASE-21480:
-----------------------------------
If your timeout is big enough, i.e, more than 10 minutes, then there will be no
problem. The snapshot operation will fail and finally the regions will become
online. It will not make the cluster hang there for ever, just about 10
minutes...
> Taking snapshot when RS crashes prevent we bring the regions online
> -------------------------------------------------------------------
>
> Key: HBASE-21480
> URL: https://issues.apache.org/jira/browse/HBASE-21480
> Project: HBase
> Issue Type: Improvement
> Components: snapshots
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
> Fix For: 3.0.0, 2.2.0
>
> Attachments: HBASE-21480-UT-v1.patch, HBASE-21480-UT.patch,
> HBASE-21480.patch
>
>
> The current implementation is not good enough. It will take the exclusive
> lock all the time which could hurt the availability, as we need to hold the
> shared lock when assigning regions.
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