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https://issues.apache.org/jira/browse/HBASE-5075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215757#comment-13215757
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Lars Hofhansl commented on HBASE-5075:
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Actually, the patches do not apply cleanly to HBase trunk.
> 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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