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https://issues.apache.org/jira/browse/HBASE-19976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16360473#comment-16360473
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Duo Zhang commented on HBASE-19976:
-----------------------------------
It is not easy to fix since the MasterProcedureScheduler is really really
complicated...
> Dead lock if the worker threads in procedure executor are exhausted
> -------------------------------------------------------------------
>
> Key: HBASE-19976
> URL: https://issues.apache.org/jira/browse/HBASE-19976
> Project: HBase
> Issue Type: Bug
> Reporter: Duo Zhang
> Priority: Critical
>
> See the comments in HBASE-19554. If all the worker threads are stuck in
> AssignProcdure since meta region is offline, then the RecoverMetaProcedure
> can not be executed and cause dead lock.
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