Xiao Chen created HDFS-10963:
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Summary: 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
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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