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https://issues.apache.org/jira/browse/HDFS-10963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15552765#comment-15552765
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Xiao Chen commented on HDFS-10963:
----------------------------------
Thank you [~brahmareddy]!
> Reduce log level when network topology cannot find enough datanodes.
> --------------------------------------------------------------------
>
> Key: HDFS-10963
> URL: https://issues.apache.org/jira/browse/HDFS-10963
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Priority: Minor
> Labels: supportability
> Fix For: 2.8.0, 3.0.0-alpha2
>
> Attachments: HDFS-10963.01.patch
>
>
> Credit to [~qwertymaniac] who reported this.
> {quote}
> The change made by HDFS-10320 now causes all 1-rack cluster to keep printing
> below:
> WARN org.apache.hadoop.net.NetworkTopology
> Failed to find datanode (scope="" excludedScope="/default").
> {quote}
> This was added in HDFS-10320 to replace an exception that caused NN
> terminate. A warn log was added. But thinking closely, this should be debug
> to reduce confusion.
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