4-thread Deadlock in DFS Client
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Key: HDFS-796
URL: https://issues.apache.org/jira/browse/HDFS-796
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs client
Reporter: Todd Lipcon
Attachments: deadlock.txt
Managed to get this deadlock running TestHDFSCLI this afternoon. It seems to be
related to a signal, though I don't recall hitting ^C. The one thing I did that
might help trigger this was reduce the Thread.sleep(1000) in LeaseChecker down
to a shorter interval.
"SIGTERM handler":
waiting to lock monitor 0x0000000041f3bd18 (object 0x00007fa43c132328, a
java.lang.Class),
which is held by "SIGINT handler"
"SIGINT handler":
waiting to lock monitor 0x000000004230b410 (object 0x00007fa441603030, a
org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer),
which is held by "Thread-3"
"Thread-3":
waiting to lock monitor 0x00007fa4341fe3f0 (object 0x00007fa441d3b150, a
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream),
which is held by "main"
"main":
waiting to lock monitor 0x0000000042b1ec80 (object 0x00007fa44167eff8, a
org.apache.hadoop.hdfs.DFSClient$LeaseChecker),
which is held by "Thread-3"
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