Datanode is marked dead, but datanode process is alive and verifying blocks
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Key: HDFS-1766
URL: https://issues.apache.org/jira/browse/HDFS-1766
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 0.23.0
Reporter: Hairong Kuang
Assignee: Hairong Kuang
Fix For: 0.23.0
We have a datanode marked dead in the namenode, and it is not taking any
traffic. But it is verifying blocks continuously, so the DataNode process is
definitely not dead. Jstack shows that the main thread and the offerService
thread are gone but the JVM stuck at waiting for other threads to die. It seems
to me that the offerService thread has died abnormally, for example, by a
runtime exception and it did not shut down other threads before exiting.
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