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Date: Wed, 14 Nov 2012 13:20:14 +0000 (UTC)
From: "Anonymous (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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 <187011353.29846.1324367130908.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Updated] (HBASE-5075) regionserver crashed and failover
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     [ https://issues.apache.org/jira/browse/HBASE-5075?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Anonymous updated HBASE-5075:
-----------------------------

    Affects Version/s:     (was: 0.92.1)
                       0.90.5
         Hadoop Flags: Incompatible change
               Status: Patch Available  (was: Reopened)
    
> regionserver crashed and failover
> ---------------------------------
>
>                 Key: HBASE-5075
>                 URL: https://issues.apache.org/jira/browse/HBASE-5075
>             Project: HBase
>          Issue Type: Improvement
>          Components: monitoring, regionserver, Replication, Zookeeper
>    Affects Versions: 0.90.5
>            Reporter: zhiyuan.dai
>             Fix For: 0.90.5
>
>         Attachments: Degion of Failure Detection.pdf, HBase-5075-shell.patch, HBase-5075-src.patch
>
>
> regionserver crashed,it is too long time to notify hmaster.when hmaster know regionserver's shutdown,it is long time to fetch the hlog's lease.
> hbase is a online db, availability is very important.
> i have a idea to improve availability, monitor node to check regionserver's pid.if this pid not exsits,i think the rs down,i will delete the znode,and force close the hlog file.
> so the period maybe 100ms.

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