Kihwal Lee created HDFS-9445:
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Summary: Deadlock in datanode
Key: HDFS-9445
URL: https://issues.apache.org/jira/browse/HDFS-9445
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Kihwal Lee
Priority: Blocker
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Found one Java-level deadlock:
=============================
"DataXceiver for client DFSClient_attempt_xxx at /10.217.77.219:52900 [Sending
block BP-xxxxx:blk_123_456]":
waiting to lock monitor 0x00007f77d0731768 (object 0x00000000d60d9930, a
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl),
which is held by "Thread-565"
"Thread-565":
waiting for ownable synchronizer 0x00000000d55613c8, (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
which is held by "DataNode: heartbeating to my-nn:8020"
"DataNode: heartbeating to my-nn:8020":
waiting to lock monitor 0x00007f77d0731768 (object 0x00000000d60d9930, a
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl),
which is held by "Thread-565"
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