Kihwal Lee created HDFS-8315:
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Summary: Datanode does not log reads
Key: HDFS-8315
URL: https://issues.apache.org/jira/browse/HDFS-8315
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Kihwal Lee
Priority: Critical
HDFS-6836 made datanode read request logging DEBUG. There is a good reason why
it was at INFO for so many years. This is very useful in debugging load
issues. This jira will revert HDFS-6836.
We haven't seen it being a bottleneck on busy hbase clusters, but if someone
thinks it is a serious overhead, please make it configurable in a separate jira.
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