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https://issues.apache.org/jira/browse/HBASE-4274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13093327#comment-13093327
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Andrew Purtell commented on HBASE-4274:
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In general we should opt for strategies that allow the RS to ride over short
DFS interruptions, such as a rolling restart of DNs, or a switch reload or
failover, or similar. So I lean toward -1 changes that make the RS more
aggressive about terminating in such situations as long as we also reason
carefully about (avoiding) data loss.
> RS should periodically ping its HLog pipeline even if no writes are arriving
> ----------------------------------------------------------------------------
>
> Key: HBASE-4274
> URL: https://issues.apache.org/jira/browse/HBASE-4274
> Project: HBase
> Issue Type: Improvement
> Components: regionserver, wal
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.0
>
>
> If you restart HDFS underneath HBase, when HBase isn't taking any write load,
> the region servers won't "notice" that there's any problem until the next
> time they take a write, at which point they will abort (because the pipeline
> is gone from beneath them). It would be better if they wrote some garbage to
> their HLog once every few seconds as a sort of keepalive, so they will
> aggressively abort as soon as there's an issue.
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