DataNode should sleep before reentering service loop after an exception
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Key: HDFS-1203
URL: https://issues.apache.org/jira/browse/HDFS-1203
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Attachments: hdfs-1203.txt
When the DN gets an exception in response to a heartbeat, it logs it and
continues, but there is no sleep. I've occasionally seen bugs produce a case
where heartbeats continuously produce exceptions, and thus the DN floods the NN
with bad heartbeats. Adding a 1 second sleep at least throttles the error
messages for easier debugging and error isolation.
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