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From 邓飞 (JIRA) <j...@apache.org>
Subject [jira] [Created] (HDFS-9294) DFSClient deadlock when close file and failed to renew lease
Date Fri, 23 Oct 2015 09:29:27 GMT
邓飞 created HDFS-9294:
------------------------

             Summary: DFSClient  deadlock when close file and failed to renew lease
                 Key: HDFS-9294
                 URL: https://issues.apache.org/jira/browse/HDFS-9294
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: HDFS, hdfs-client
    Affects Versions: 2.7.1, 2.2.0
         Environment: Hadoop 2.2.0
            Reporter: 邓飞


We found a deadlock at our HBase(0.98) cluster(and the Hadoop Version is 2.2.0),and it should
be HDFS BUG,at the time our network is not stable.
 below is the stack:

*************************************************************************************************************************************
Found one Java-level deadlock:
=============================
"MemStoreFlusher.1":
  waiting to lock monitor 0x00007ff27cfa5218 (object 0x00000002fae5ebe0, a org.apache.hadoop.hdfs.LeaseRenewer),
  which is held by "LeaseRenewer:hbaseadmin@hbase-ns-gdt-sh-marvel"
"LeaseRenewer:hbaseadmin@hbase-ns-gdt-sh-marvel":
  waiting to lock monitor 0x00007ff2e67e16a8 (object 0x0000000486ce6620, a org.apache.hadoop.hdfs.DFSOutputStream),
  which is held by "MemStoreFlusher.0"
"MemStoreFlusher.0":
  waiting to lock monitor 0x00007ff27cfa5218 (object 0x00000002fae5ebe0, a org.apache.hadoop.hdfs.LeaseRenewer),
  which is held by "LeaseRenewer:hbaseadmin@hbase-ns-gdt-sh-marvel"

Java stack information for the threads listed above:
===================================================
"MemStoreFlusher.1":
	at org.apache.hadoop.hdfs.LeaseRenewer.addClient(LeaseRenewer.java:216)
	- waiting to lock <0x00000002fae5ebe0> (a org.apache.hadoop.hdfs.LeaseRenewer)
	at org.apache.hadoop.hdfs.LeaseRenewer.getInstance(LeaseRenewer.java:81)
	at org.apache.hadoop.hdfs.DFSClient.getLeaseRenewer(DFSClient.java:648)
	at org.apache.hadoop.hdfs.DFSClient.endFileLease(DFSClient.java:659)
	at org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:1882)
	- locked <0x000000055b606cb0> (a org.apache.hadoop.hdfs.DFSOutputStream)
	at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:71)
	at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:104)
	at org.apache.hadoop.hbase.io.hfile.AbstractHFileWriter.finishClose(AbstractHFileWriter.java:250)
	at org.apache.hadoop.hbase.io.hfile.HFileWriterV2.close(HFileWriterV2.java:402)
	at org.apache.hadoop.hbase.regionserver.StoreFile$Writer.close(StoreFile.java:974)
	at org.apache.hadoop.hbase.regionserver.StoreFlusher.finalizeWriter(StoreFlusher.java:78)
	at org.apache.hadoop.hbase.regionserver.DefaultStoreFlusher.flushSnapshot(DefaultStoreFlusher.java:75)
	- locked <0x000000059869eed8> (a java.lang.Object)
	at org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:812)
	at org.apache.hadoop.hbase.regionserver.HStore$StoreFlusherImpl.flushCache(HStore.java:1974)
	at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1795)
	at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1678)
	at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:1591)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:472)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushOneForGlobalPressure(MemStoreFlusher.java:211)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.access$500(MemStoreFlusher.java:66)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher$FlushHandler.run(MemStoreFlusher.java:238)
	at java.lang.Thread.run(Thread.java:744)
"LeaseRenewer:hbaseadmin@hbase-ns-gdt-sh-marvel":
	at org.apache.hadoop.hdfs.DFSOutputStream.abort(DFSOutputStream.java:1822)
	- waiting to lock <0x0000000486ce6620> (a org.apache.hadoop.hdfs.DFSOutputStream)
	at org.apache.hadoop.hdfs.DFSClient.closeAllFilesBeingWritten(DFSClient.java:780)
	at org.apache.hadoop.hdfs.DFSClient.abort(DFSClient.java:753)
	at org.apache.hadoop.hdfs.LeaseRenewer.run(LeaseRenewer.java:453)
	- locked <0x00000002fae5ebe0> (a org.apache.hadoop.hdfs.LeaseRenewer)
	at org.apache.hadoop.hdfs.LeaseRenewer.access$700(LeaseRenewer.java:71)
	at org.apache.hadoop.hdfs.LeaseRenewer$1.run(LeaseRenewer.java:298)
	at java.lang.Thread.run(Thread.java:744)
"MemStoreFlusher.0":
	at org.apache.hadoop.hdfs.LeaseRenewer.addClient(LeaseRenewer.java:216)
	- waiting to lock <0x00000002fae5ebe0> (a org.apache.hadoop.hdfs.LeaseRenewer)
	at org.apache.hadoop.hdfs.LeaseRenewer.getInstance(LeaseRenewer.java:81)
	at org.apache.hadoop.hdfs.DFSClient.getLeaseRenewer(DFSClient.java:648)
	at org.apache.hadoop.hdfs.DFSClient.endFileLease(DFSClient.java:659)
	at org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:1882)
	- locked <0x0000000486ce6620> (a org.apache.hadoop.hdfs.DFSOutputStream)
	at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:71)
	at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:104)
	at org.apache.hadoop.hbase.io.hfile.AbstractHFileWriter.finishClose(AbstractHFileWriter.java:250)
	at org.apache.hadoop.hbase.io.hfile.HFileWriterV2.close(HFileWriterV2.java:402)
	at org.apache.hadoop.hbase.regionserver.StoreFile$Writer.close(StoreFile.java:974)
	at org.apache.hadoop.hbase.regionserver.StoreFlusher.finalizeWriter(StoreFlusher.java:78)
	at org.apache.hadoop.hbase.regionserver.DefaultStoreFlusher.flushSnapshot(DefaultStoreFlusher.java:75)
	- locked <0x00000004888f6848> (a java.lang.Object)
	at org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:812)
	at org.apache.hadoop.hbase.regionserver.HStore$StoreFlusherImpl.flushCache(HStore.java:1974)
	at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1795)
	at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1678)
	at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:1591)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:472)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:435)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.access$800(MemStoreFlusher.java:66)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher$FlushHandler.run(MemStoreFlusher.java:253)
	at java.lang.Thread.run(Thread.java:744)

Found 1 deadlock. 

**********************************************************************


the thread "MemStoreFlusher.0" is closing outputStream and remove it's lease ;
other side the daemon thread "LeaseRenewer" failed to connect active nn  for renewing  lease,but
 got SocketTimeoutException   cause of network is not good,so abort outputstream.
then deadlock is made.

and it seems not solved at Hadoop 2.7.1 .If confirmed , we can fixed the issue.



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