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From 毛宏 <maohong1...@gmail.com>
Subject JobTracker startup failure when starting hadoop-0.20.0 cluster on Amazon EC2 with contrib/ec2 scripts
Date Thu, 25 Mar 2010 15:54:25 GMT
I downloaded Hadoop 0.20.0 and used the src/contrib/ec2/bin scripts to
launch a Hadoop cluster on Amazon EC2, after building a new Hadoop
0.20.0 AMI. 

I launched an instance with my new Hadoop 0.20.0 AMI, then logged in and
ran the following to launch a new cluster:
root(/vol/hadoop-0.20.0)> bin/launch-hadoop-cluster hadoop-test 2

After the usual EC2 wait, one master and two slave instances were
launched on EC2, as expected. When I ssh'ed into the instances, here is
what I found:

Slaves: DataNode and NameNode are running
Master: Only NameNode is running

I could use HDFS commands (using $HADOOP_HOME/bin/hadoop scripts)
without any problems, from both master and slaves. However, since
JobTracker is not running, I cannot run map-reduce jobs.

I checked the logs from /vol/hadoop-0.20.0/logs for the JobTracker,
reproduced below:
------------------------------------------------------------------------
----
2009-09-03 18:55:38,486 WARN org.apache.hadoop.conf.Configuration:
DEPRECATED: hadoop-site.xml found in the classpath. Usage of
hadoop-site.xml is deprecated. Instead use core-site.xml,
mapred-site.xml and h
dfs-site.xml to override properties of core-default.xml,
mapred-default.xml and hdfs-default.xml respectively
2009-09-03 18:55:38,520 INFO org.apache.hadoop.mapred.JobTracker:
STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting JobTracker
STARTUP_MSG:   host =
domU-12-31-39-06-44-E3.compute-1.internal/10.208.75.17
STARTUP_MSG:   args = []
STARTUP_MSG:   version = 0.20.0
STARTUP_MSG:   build =
https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.20 -r
763504; compiled by 'ndaley' on Thu Apr  9 05:18:40 UTC 2009
************************************************************/
2009-09-03 18:55:38,652 INFO org.apache.hadoop.ipc.metrics.RpcMetrics:
Initializing RPC Metrics with hostName=JobTracker, port=50002
2009-09-03 18:55:38,703 INFO org.mortbay.log: Logging to
org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via
org.mortbay.log.Slf4jLog
2009-09-03 18:55:38,827 INFO org.apache.hadoop.http.HttpServer: Jetty
bound to port 50030
2009-09-03 18:55:38,827 INFO org.mortbay.log: jetty-6.1.14
2009-09-03 18:55:48,425 INFO org.mortbay.log: Started
SelectChannelConnector@0.0.0.0:50030
2009-09-03 18:55:48,427 INFO org.apache.hadoop.metrics.jvm.JvmMetrics:
Initializing JVM Metrics with processName=JobTracker, sessionId=
2009-09-03 18:55:48,432 INFO org.apache.hadoop.mapred.JobTracker:
JobTracker up at: 50002
2009-09-03 18:55:48,432 INFO org.apache.hadoop.mapred.JobTracker:
JobTracker webserver: 50030
2009-09-03 18:55:48,541 INFO org.apache.hadoop.mapred.JobTracker:
Cleaning up the system directory
2009-09-03 18:55:48,628 INFO org.apache.hadoop.hdfs.DFSClient:
org.apache.hadoop.ipc.RemoteException: java.io.IOException: File
/mnt/hadoop/mapred/system/jobtracker.info could only be replicated to 0
nodes, 
instead of 1
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(F
SNamesystem.java:1256)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:4
22)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
a:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)

        at org.apache.hadoop.ipc.Client.call(Client.java:739)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
        at $Proxy4.addBlock(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
a:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvo
cationHandler.java:82)
        at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocation
Handler.java:59)
        at $Proxy4.addBlock(Unknown Source)
        at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DF
SClient.java:2873)
        at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(D
FSClient.java:2755)

        at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.j
ava:2046)
        at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSCli
ent.java:2232)

2009-09-03 18:55:48,628 WARN org.apache.hadoop.hdfs.DFSClient:
NotReplicatedYetException sleeping
/mnt/hadoop/mapred/system/jobtracker.info retries left 4
2009-09-03 18:55:49,030 INFO org.apache.hadoop.hdfs.DFSClient:
org.apache.hadoop.ipc.RemoteException: java.io.IOException: File
/mnt/hadoop/mapred/system/jobtracker.info could only be replicated to 0
nodes, 
instead of 1
...
------------------------------------------------------------------------
----
The JobTracker ports are all free [not used by any other process].

Any suggestions would be appreciated.

Thanks a lot



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