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https://issues.apache.org/jira/browse/HBASE-22731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16896032#comment-16896032
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Peter Somogyi commented on HBASE-22731:
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Please use parameterized logging instead of string concatenation.
[https://www.slf4j.org/faq.html#logging_performance]
> ReplicationSource and HBaseInterClusterReplicationEndpoint log messages
> should include a target Peer identifier
> ---------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-22731
> URL: https://issues.apache.org/jira/browse/HBASE-22731
> Project: HBase
> Issue Type: Improvement
> Components: Replication
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Minor
> Attachments: HBASE-22731.master.001.patch
>
>
> _ReplicationSource_ and _HBaseInterClusterReplicationEndpoint_ already
> include a good number of helpful DEBUG and TRACE log messages to help us
> troubleshooting typical replication problems, such as lags or mysteriously
> missing edits on target peer.
> However, for each configured peer, there will be an individual
> _ReplicationSource_/_HBaseInterClusterReplicationEndpoint_ pair running in
> parallel, in scenarios where we need to investigate issues within a source to
> an specific peer, we can't distinguish from which peer specific
> _ReplicationSource_/_HBaseInterClusterReplicationEndpoint._ For such cases it
> would be nice to have an identifier for specific peer the given
> _ReplicationSource_/_HBaseInterClusterReplicationEndpoint_ is related to.
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