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  1. Hadoop Distributed Data Store
  2. HDDS-2332

BlockOutputStream#waitOnFlushFutures blocks on putBlock combined future

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Ozone Client
    • Labels:
      None
    • Target Version/s:

      Description

      BlockOutputStream blocks on waitOnFlushFutures call. Two jstacks show that the thread is blocked on the same condition.

      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)
      

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              • Assignee:
                Unassigned
                Reporter:
                ljain Lokesh Jain
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                Dates

                • Created:
                  Updated: