Lokesh Jain created HDDS-2332:
---------------------------------
Summary: BlockOutputStream#waitOnFlushFutures blocks on putBlock
combined future
Key: HDDS-2332
URL: https://issues.apache.org/jira/browse/HDDS-2332
Project: Hadoop Distributed Data Store
Issue Type: Bug
Components: Ozone Client
Reporter: Lokesh Jain
BlockOutputStream blocks on waitOnFlushFutures call. Two jstacks show that the
thread is blocked on the same condition.
{code:java}
2019-10-18 06:30:38
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.141-b15 mixed mode):
"main" #1 prio=5 os_prio=0 tid=0x00007fbea001a800 nid=0x2a56 waiting on
condition [0x00007fbea96d6000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000e4739888> (a
java.util.concurrent.CompletableFuture$Signaller)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at
java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1693)
at
java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323)
at
java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1729)
at
java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
at
org.apache.hadoop.hdds.scm.storage.BlockOutputStream.waitOnFlushFutures(BlockOutputStream.java:518)
at
org.apache.hadoop.hdds.scm.storage.BlockOutputStream.handleFlush(BlockOutputStream.java:481)
at
org.apache.hadoop.hdds.scm.storage.BlockOutputStream.close(BlockOutputStream.java:496)
at
org.apache.hadoop.ozone.client.io.BlockOutputStreamEntry.close(BlockOutputStreamEntry.java:143)
at
org.apache.hadoop.ozone.client.io.KeyOutputStream.handleFlushOrClose(KeyOutputStream.java:439)
at
org.apache.hadoop.ozone.client.io.KeyOutputStream.handleWrite(KeyOutputStream.java:232)
at
org.apache.hadoop.ozone.client.io.KeyOutputStream.write(KeyOutputStream.java:190)
at
org.apache.hadoop.fs.ozone.OzoneFSOutputStream.write(OzoneFSOutputStream.java:46)
at
org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:57)
at java.io.DataOutputStream.write(DataOutputStream.java:107)
- locked <0x00000000a6a75930> (a
org.apache.hadoop.fs.FSDataOutputStream)
at
org.apache.hadoop.examples.terasort.TeraOutputFormat$TeraRecordWriter.write(TeraOutputFormat.java:77)
- locked <0x00000000a6a75918> (a
org.apache.hadoop.examples.terasort.TeraOutputFormat$TeraRecordWriter)
at
org.apache.hadoop.examples.terasort.TeraOutputFormat$TeraRecordWriter.write(TeraOutputFormat.java:64)
at
org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.write(MapTask.java:670)
at
org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)
at
org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)
at
org.apache.hadoop.examples.terasort.TeraGen$SortGenMapper.map(TeraGen.java:230)
at
org.apache.hadoop.examples.terasort.TeraGen$SortGenMapper.map(TeraGen.java:203)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:799)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:347)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:174)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1876)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:168)
2019-10-18 07:02:50
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.141-b15 mixed mode):
"main" #1 prio=5 os_prio=0 tid=0x00007fbea001a800 nid=0x2a56 waiting on
condition [0x00007fbea96d6000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000e4739888> (a
java.util.concurrent.CompletableFuture$Signaller)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at
java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1693)
at
java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323)
at
java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1729)
at
java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
at
org.apache.hadoop.hdds.scm.storage.BlockOutputStream.waitOnFlushFutures(BlockOutputStream.java:518)
at
org.apache.hadoop.hdds.scm.storage.BlockOutputStream.handleFlush(BlockOutputStream.java:481)
at
org.apache.hadoop.hdds.scm.storage.BlockOutputStream.close(BlockOutputStream.java:496)
at
org.apache.hadoop.ozone.client.io.BlockOutputStreamEntry.close(BlockOutputStreamEntry.java:143)
at
org.apache.hadoop.ozone.client.io.KeyOutputStream.handleFlushOrClose(KeyOutputStream.java:439)
at
org.apache.hadoop.ozone.client.io.KeyOutputStream.handleWrite(KeyOutputStream.java:232)
at
org.apache.hadoop.ozone.client.io.KeyOutputStream.write(KeyOutputStream.java:190)
at
org.apache.hadoop.fs.ozone.OzoneFSOutputStream.write(OzoneFSOutputStream.java:46)
at
org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:57)
at java.io.DataOutputStream.write(DataOutputStream.java:107)
- locked <0x00000000a6a75930> (a
org.apache.hadoop.fs.FSDataOutputStream)
at
org.apache.hadoop.examples.terasort.TeraOutputFormat$TeraRecordWriter.write(TeraOutputFormat.java:77)
- locked <0x00000000a6a75918> (a
org.apache.hadoop.examples.terasort.TeraOutputFormat$TeraRecordWriter)
at
org.apache.hadoop.examples.terasort.TeraOutputFormat$TeraRecordWriter.write(TeraOutputFormat.java:64)
at
org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.write(MapTask.java:670)
at
org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)
at
org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)
at
org.apache.hadoop.examples.terasort.TeraGen$SortGenMapper.map(TeraGen.java:230)
at
org.apache.hadoop.examples.terasort.TeraGen$SortGenMapper.map(TeraGen.java:203)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:799)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:347)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:174)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1876)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:168)
{code}
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