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From "Xu, Richard " <richard...@citi.com>
Subject Unable to start hadoop-0.20.2 but able to start hadoop-0.20.203 cluster
Date Fri, 27 May 2011 00:01:37 GMT
Hi Folks,

We try to get hbase and hadoop running on clusters, take 2 Solaris servers for now.

Because of the incompatibility issue between hbase and hadoop, we have to stick with hadoop
0.20.2-append release.

It is very straight forward to make hadoop-0.20.203 running, but stuck for several days with
hadoop-0.20.2, even the official release, not the append version.

1. Once try to run start-mapred.sh(hadoop-daemon.sh --config $HADOOP_CONF_DIR start jobtracker),
following errors shown in namenode and jobtracker logs:

2011-05-26 12:30:29,169 WARN org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Not able
to place enough replicas, still in need of 1
2011-05-26 12:30:29,175 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on 9000, call
addBlock(/tmp/hadoop-cfadm/mapred/system/jobtracker.info, DFSCl
ient_2146408809) from 169.193.181.212:55334: error: java.io.IOException: File /tmp/hadoop-cfadm/mapred/system/jobtracker.info
could only be replicated to 0 n
odes, instead of 1
java.io.IOException: File /tmp/hadoop-cfadm/mapred/system/jobtracker.info could only be replicated
to 0 nodes, instead of 1
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$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)


2. Also, Configured Capacity is 0, cannot put any file to HDFS.

3. in datanode server, no error in logs, but tasktracker logs has the following suspicious
thing:
2011-05-25 23:36:10,839 INFO org.apache.hadoop.ipc.Server: IPC Server Responder: starting
2011-05-25 23:36:10,839 INFO org.apache.hadoop.ipc.Server: IPC Server listener on 41904: starting
2011-05-25 23:36:10,852 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 41904:
starting
2011-05-25 23:36:10,853 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on 41904:
starting
2011-05-25 23:36:10,853 INFO org.apache.hadoop.ipc.Server: IPC Server handler 2 on 41904:
starting
2011-05-25 23:36:10,853 INFO org.apache.hadoop.ipc.Server: IPC Server handler 3 on 41904:
starting
                                        .....
2011-05-25 23:36:10,855 INFO org.apache.hadoop.ipc.Server: IPC Server handler 63 on 41904:
starting
2011-05-25 23:36:10,950 INFO org.apache.hadoop.mapred.TaskTracker: TaskTracker up at: localhost/127.0.0.1:41904
2011-05-25 23:36:10,950 INFO org.apache.hadoop.mapred.TaskTracker: Starting tracker tracker_loanps3d:localhost/127.0.0.1:41904


I have tried all suggestions found so far, including
     1) remove hadoop-name and hadoop-data folders and reformat namenode;
     2) clean up all temp files/folders under /tmp;

But nothing works.

Your help is greatly appreciated.

Thanks,

RX

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