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From "stack (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4274) RS should periodically ping its HLog pipeline even if no writes are arriving
Date Tue, 25 Oct 2011 07:22:32 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-4274:
-------------------------

    Fix Version/s:     (was: 0.92.0)
                   0.94.0

Moving out of 0.92.  This does not seem to be a critical 0.92 issue any more given Gary work.
                
> 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: 0.94.0
>
>
> 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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