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Posted to mapreduce-issues@hadoop.apache.org by "Liyin Liang (JIRA)" <ji...@apache.org> on 2011/08/01 08:21:10 UTC
[jira] [Updated] (MAPREDUCE-2209) TaskTracker's heartbeat hang for
several minutes when copying large job.jar from HDFS
[ https://issues.apache.org/jira/browse/MAPREDUCE-2209?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Liyin Liang updated MAPREDUCE-2209:
-----------------------------------
Attachment: 2209-1.diff
> TaskTracker's heartbeat hang for several minutes when copying large job.jar from HDFS
> -------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-2209
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2209
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Environment: hadoop version: 0.19.1
> Reporter: Liyin Liang
> Priority: Blocker
> Attachments: 2209-1.diff
>
>
> If a job's jar file is very large, e.g 200m+, the TaskTracker's heartbeat hang for several minutes when localizing the job. The jstack of related threads are as follows:
> {code:borderStyle=solid}
> "TaskLauncher for task" daemon prio=10 tid=0x0000002b05ee5000 nid=0x1adf runnable [0x0000000042e56000]
> java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
> at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:215)
> at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
> - locked <0x0000002afc892ec8> (a sun.nio.ch.Util$1)
> - locked <0x0000002afc892eb0> (a java.util.Collections$UnmodifiableSet)
> - locked <0x0000002afc8927d8> (a sun.nio.ch.EPollSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
> at org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWithTimeout.java:260)
> at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:155)
> at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:150)
> at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:123)
> at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
> - locked <0x0000002afce26158> (a java.io.BufferedInputStream)
> at java.io.DataInputStream.readShort(DataInputStream.java:295)
> at org.apache.hadoop.hdfs.DFSClient$BlockReader.newBlockReader(DFSClient.java:1304)
> at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1556)
> - locked <0x0000002afce26218> (a org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
> at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1673)
> - locked <0x0000002afce26218> (a org.apache.hadoop.hdfs.DFSClient$DFSInputStream)
> at java.io.DataInputStream.read(DataInputStream.java:83)
> at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:47)
> at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:85)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:209)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:142)
> at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1214)
> at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1195)
> at org.apache.hadoop.mapred.TaskTracker.localizeJob(TaskTracker.java:824)
> - locked <0x0000002afce2d260> (a org.apache.hadoop.mapred.TaskTracker$RunningJob)
> at org.apache.hadoop.mapred.TaskTracker.startNewTask(TaskTracker.java:1745)
> at org.apache.hadoop.mapred.TaskTracker.access$1200(TaskTracker.java:103)
> at org.apache.hadoop.mapred.TaskTracker$TaskLauncher.run(TaskTracker.java:1710)
> "Map-events fetcher for all reduce tasks on tracker_r01a08025:localhost/127.0.0.1:50050" daemon prio=10 tid=0x0000002b05ef8000
> nid=0x1ada waiting for monitor entry [0x0000000042d55000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.hadoop.mapred.TaskTracker$MapEventsFetcherThread.reducesInShuffle(TaskTracker.java:582)
> - waiting to lock <0x0000002afce2d260> (a org.apache.hadoop.mapred.TaskTracker$RunningJob)
> at org.apache.hadoop.mapred.TaskTracker$MapEventsFetcherThread.run(TaskTracker.java:617)
> - locked <0x0000002a9eefe1f8> (a java.util.TreeMap)
> "IPC Server handler 2 on 50050" daemon prio=10 tid=0x0000002b050eb000 nid=0x1ab0 waiting for monitor entry [0x000000004234b000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.hadoop.mapred.TaskTracker.getMapCompletionEvents(TaskTracker.java:2684)
> - waiting to lock <0x0000002a9eefe1f8> (a java.util.TreeMap)
> - locked <0x0000002a9eac1de8> (a org.apache.hadoop.mapred.TaskTracker)
> at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:894)
> "main" prio=10 tid=0x0000000040113800 nid=0x197d waiting for monitor entry [0x000000004022a000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.hadoop.mapred.TaskTracker.transmitHeartBeat(TaskTracker.java:1196)
> - waiting to lock <0x0000002a9eac1de8> (a org.apache.hadoop.mapred.TaskTracker)
> at org.apache.hadoop.mapred.TaskTracker.offerService(TaskTracker.java:1068)
> at org.apache.hadoop.mapred.TaskTracker.run(TaskTracker.java:1799)
> at org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:2898)
> {code}
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