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https://issues.apache.org/jira/browse/HBASE-29682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HBASE-29682:
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Labels: pull-request-available (was: )
> Admin#flushMasterStore() should roll the HMaster WAL
> ----------------------------------------------------
>
> Key: HBASE-29682
> URL: https://issues.apache.org/jira/browse/HBASE-29682
> Project: HBase
> Issue Type: Improvement
> Reporter: Charles Connell
> Assignee: Charles Connell
> Priority: Minor
> Labels: pull-request-available
>
> I argue that in addition to flushing the master region, the
> flushMasterStore() RPC should also roll the WAL files being written by the
> HMaster.
> In clusters with small numbers of DataNodes (less than 9, in my experience),
> a rolling restart of the DataNodes will break WAL writers, in both HMasters
> and RegionServers. This can be worked around on RegionServers by calling
> {{admin.rollWALWriter()}} on every RegionServer after restarting each
> DataNode. Currently, there is no equivalent way to do this to an HMaster. I
> think the most elegant solution is to augment {{admin.flushMasterStore()}}.
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