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https://issues.apache.org/jira/browse/HDFS-17204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoqiao He resolved HDFS-17204.
--------------------------------
Fix Version/s: 3.4.0
Hadoop Flags: Reviewed
Resolution: Fixed
> EC: Reduce unnecessary log when processing excess redundancy.
> -------------------------------------------------------------
>
> Key: HDFS-17204
> URL: https://issues.apache.org/jira/browse/HDFS-17204
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Shuyan Zhang
> Assignee: Shuyan Zhang
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
>
> This is a follow-up of
> [HDFS-16964|https://issues.apache.org/jira/browse/HDFS-16964]. We now avoid
> stale replicas when dealing with redundancy. This may result in redundant
> replicas not being in the `nonExcess` set when we enter
> `BlockManager#chooseExcessRedundancyStriped` (because the datanode where the
> redundant replicas are located has not send FBR yet, so those replicas are
> filtered out and not added to the `nonExcess` set). A further result is that
> no excess storage type is selected and the log "excess types chosen for
> block..." is printed. When a failover occurs, a large number of datanodes
> become stale, which causes NameNodes to print a large number of unnecessary
> logs.
> This issue needs to be fixed, otherwise the performance after failover will
> be affected.
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