[HDFS-6139] JobTracker blocked on TIMED_WAITING DFSOutputStream.waitForAckedSeqno() running

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 2.0.0-alpha
• Component/s: hdfs-client
• Assignee: Unassigned
• Reporter: Muga Nishizawa
• Created: 21/Mar/14 21:01
• Updated: 23/Mar/14 09:21
• Resolved: 21/Mar/14 21:07

Description

We're using CDH 4.2.1. The following is a part of threaddump on our JobTracker.

"IPC Server handler 249 on 8021" daemon prio=10 tid=0x00007fce80e2c000 nid=0x718e in Object.wait() [0x00007fc92afe6000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00007fc95f5ffba8> (a java.util.LinkedList)
        at org.apache.hadoop.hdfs.DFSOutputStream.waitForAckedSeqno(DFSOutputStream.java:1708)
        - locked <0x00007fc95f5ffba8> (a java.util.LinkedList)
        at org.apache.hadoop.hdfs.DFSOutputStream.flushInternal(DFSOutputStream.java:1694)
        at org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:1778)
        - locked <0x00007fc95f5ff898> (a org.apache.hadoop.hdfs.DFSOutputStream)
        at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:66)
        at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:99)
        at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:3562)
        - locked <0x00007fc9652787e0> (a org.apache.hadoop.mapred.JobTracker)
        at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:3475)
        at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.WritableRpcEngine$Server$WritableRpcInvoker.call(WritableRpcEngine.java:474)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1002)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1695)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1691)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1689)
... ...
"Thread-9489990" daemon prio=10 tid=0x00007fce6c01b000 nid=0x14e1 runnable [0x00007fc8f38f7000]
   java.lang.Thread.State: RUNNABLE
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:210)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
        - locked <0x00007fc9631201d0> (a sun.nio.ch.Util$1)
        - locked <0x00007fc9631201e8> (a java.util.Collections$UnmodifiableSet)
        - locked <0x00007fc963120158> (a sun.nio.ch.EPollSelectorImpl)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
        at org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWithTimeout.java:336)
        at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:158)
        at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:156)
        at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:129)
        at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:117)
        at java.io.FilterInputStream.read(FilterInputStream.java:66)
        at java.io.FilterInputStream.read(FilterInputStream.java:66)
        at org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:169)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1105)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1039)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:487)