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Posted to hdfs-dev@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2014/07/28 17:39:40 UTC
[jira] [Created] (HDFS-6764) DN heartbeats may become clumped
together
Daryn Sharp created HDFS-6764:
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Summary: DN heartbeats may become clumped together
Key: HDFS-6764
URL: https://issues.apache.org/jira/browse/HDFS-6764
Project: Hadoop HDFS
Issue Type: Bug
Components: datanode
Reporter: Daryn Sharp
DNs send heartbeats on a fixed schedule based on the last time a heartbeat was sent. If the NN takes longer to respond than the heartbeat interval then DNs do not sleep until the next interval. Instead, another heartbeat is immediately sent and all DNs begin heartbeating on the same schedule.
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