Kihwal Lee created HDFS-7932:
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Summary: Speed up the shutdown of datanode during rolling upgrade
Key: HDFS-7932
URL: https://issues.apache.org/jira/browse/HDFS-7932
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Kihwal Lee
Datanode normally exits in 3 seconds after receiving {{shutdownDatanode}}
command. However, sometimes it doesn't, especially when the IO is busy.
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