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https://issues.apache.org/jira/browse/HBASE-21610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16723585#comment-16723585
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Toshihiro Suzuki commented on HBASE-21610:
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+1
> numOpenConnections metric is set to -1 when zero server channel exist
> ---------------------------------------------------------------------
>
> Key: HBASE-21610
> URL: https://issues.apache.org/jira/browse/HBASE-21610
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Affects Versions: 2.1.1, 2.0.3
> Reporter: Pankaj Kumar
> Assignee: Pankaj Kumar
> Priority: Minor
> Fix For: 3.0.0
>
> Attachments: HBASE-21610.patch
>
>
> In NettyRpcServer, numOpenConnections metric is set to -1 when zero server
> channel exist.
> {code}
> @Override
> public int getNumOpenConnections() {
> // allChannels also contains the server channel, so exclude that from the
> count.
> return allChannels.size() - 1;
> }
> {code}
>
> We should not decrease the channel size by 1 when zero server channel exist.
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