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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5075) regionserver crashed and failover
Date Mon, 27 Feb 2012 16:40:49 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13217264#comment-13217264
] 

stack commented on HBASE-5075:
------------------------------

bq. Do you means another project instead of writing code into hbase?

Yes sir.  Process babysitters is a pretty mature domain w/ a wide variety of existing programs
that have been debugged and are able to do this for you.  What do you think about using one
of the existing solutions rather than write your own?
                
> 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: 0.92.1
>            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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