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https://issues.apache.org/jira/browse/HBASE-1414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12708673#action_12708673
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Andrew Purtell commented on HBASE-1414:
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Example from my small test cluster
{{2009-05-12 22:59:46,226 INFO org.apache.hadoop.hbase.master.ServerManager: 3
region servers, 0 dead, average load 94.0}}
> add server status logging chore to ServerManager
> ------------------------------------------------
>
> Key: HBASE-1414
> URL: https://issues.apache.org/jira/browse/HBASE-1414
> Project: Hadoop HBase
> Issue Type: Improvement
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Priority: Minor
> Fix For: 0.20.0
>
> Attachments: hbase-1414.patch
>
>
> Adds a small chore to master.ServerManager that logs the number of reporting
> region servers, the number of region servers declared dead (and their
> identity), and the average load. Uses the metaScanner period. Useful for
> those that tail the master log to get a sense of system health, or are
> considering writing Nagios monitors etc. which do the same.
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