Deadlock in DFSClient#DFSOutputStream -------------------------------------
Key: HDFS-723 URL: https://issues.apache.org/jira/browse/HDFS-723 Project: Hadoop HDFS Issue Type: Bug Reporter: Hairong Kuang Assignee: Hairong Kuang Priority: Blocker Fix For: 0.21.0 WhiIe was running some append-related tests, I hit this deadlock: Found one Java-level deadlock: ============================= "Thread-3": waiting to lock monitor 0x000000012ee044f0 (object 0x0000000107a0ded0, a org.apache.hadoop.hdfs.DFSClient$DFSOutputStream), which is held by "main" "main": waiting to lock monitor 0x000000012eeb71a8 (object 0x00000001082b0748, a org.apache.hadoop.hdfs.DFSClient$LeaseChecker), which is held by "Thread-3" Java stack information for the threads listed above: =================================================== "Thread-3": at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.close(DFSClient.java:3582) - waiting to lock <0x0000000107a0ded0> (a org.apache.hadoop.hdfs.DFSClient$DFSOutputStream) at org.apache.hadoop.hdfs.DFSClient$LeaseChecker.close(DFSClient.java:1175) - locked <0x00000001082b0748> (a org.apache.hadoop.hdfs.DFSClient$LeaseChecker) at org.apache.hadoop.hdfs.DFSClient.close(DFSClient.java:306) - locked <0x000000010824d640> (a org.apache.hadoop.hdfs.DFSClient) - waiting to lock <0x0000000107a0ded0> (a org.apache.hadoop.hdfs.DFSClient$DFSOutputStream) at org.apache.hadoop.hdfs.DFSClient$LeaseChecker.close(DFSClient.java:1175) - locked <0x00000001082b0748> (a org.apache.hadoop.hdfs.DFSClient$LeaseChecker) at org.apache.hadoop.hdfs.DFSClient.close(DFSClient.java:306) - locked <0x000000010824d640> (a org.apache.hadoop.hdfs.DFSClient) at org.apache.hadoop.hdfs.DistributedFileSystem.close(DistributedFileSystem.java:325) at org.apache.hadoop.fs.FileSystem$Cache.closeAll(FileSystem.java:1835) - locked <0x0000000107a77ec8> (a org.apache.hadoop.fs.FileSystem$Cache) at org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer.run(FileSystem.java:1851) - locked <0x00000001079daa00> (a org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer) "main": at org.apache.hadoop.hdfs.DFSClient$LeaseChecker.remove(DFSClient.java:1151) - waiting to lock <0x00000001082b0748> (a org.apache.hadoop.hdfs.DFSClient$LeaseChecker) at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.close(DFSClient.java:3609) - locked <0x0000000107a0ded0> (a org.apache.hadoop.hdfs.DFSClient$DFSOutputStream) at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:61) at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:86) at org.apache.hadoop.hdfs.TestFileAppend4.testAppend(TestFileAppend4.java:99) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at junit.framework.TestCase.runTest(TestCase.java:168) at junit.framework.TestCase.runBare(TestCase.java:134) at junit.framework.TestResult$1.protect(TestResult.java:110) at junit.framework.TestResult.runProtected(TestResult.java:128) at junit.framework.TestResult.run(TestResult.java:113) at junit.framework.TestCase.run(TestCase.java:124) at junit.framework.TestSuite.runTest(TestSuite.java:232) at junit.framework.TestSuite.run(TestSuite.java:227) at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24) at junit.extensions.TestSetup$1.protect(TestSetup.java:23) at junit.framework.TestResult.runProtected(TestResult.java:128) at junit.extensions.TestSetup.run(TestSetup.java:27) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:420) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:911) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:768) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.