FAQ
That setting is 3.

From: DAN
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 " 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

Search Discussions

Discussion Posts

Previous

Follow ups

Related Discussions

Discussion Navigation
viewthread | post
posts ‹ prev | 4 of 13 | next ›
Discussion Overview
groupcommon-user @
categorieshadoop
postedMay 27, '11 at 1:54a
activeJan 25, '12 at 7:18a
posts13
users7
websitehadoop.apache.org...
irc#hadoop

People

Translate

site design / logo © 2022 Grokbase