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From DAN <chaidong...@163.com>
Subject Re:RE: Re:Unable to start hadoop-0.20.2 but able to start hadoop-0.20.203 cluster
Date Fri, 27 May 2011 14:26:10 GMT
Hi, Richard

You see you have "2 Solaris servers for now", and dfs.replication is setted as 3.
These don't match.

Good Luck
Dan


At 2011-05-27 19:34:10,"Xu, Richard " <richard.xu@citi.com> wrote:

>That setting is 3.
>
>From: DAN [mailto:chaidongyan@163.com]
>Sent: Thursday, May 26, 2011 10:23 PM
>To: common-user@hadoop.apache.org; Xu, Richard [ICG-IT]
>Subject: Re:Unable to start hadoop-0.20.2 but able to start hadoop-0.20.203 cluster
>
>Hi, Richard
>
>Pay attention to "Not able to place enough replicas, still in need of 1". Pls confirm
right
>setting of "dfs.replication" in hdfs-site.xml.
>
>Good luck!
>Dan
>--
>
>
>At 2011-05-27 08:01:37,"Xu, Richard " <richard.xu@citi.com<mailto:richard.xu@citi.com>>
wrote:
>
>
>
>>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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