On the actual datanodes I see the following exception: I am not sure what the namespaceID is or how to sync them. Thanks for any advice!
/************************************************************ STARTUP_MSG: Starting DataNode STARTUP_MSG: host = pingo-3.poly.edu/128.238.55.33 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.20.1 STARTUP_MSG: build = http://svn.apache.org/repos/asf/hadoop/common/tags/release-0.20.1-rc1 -r 810220; compiled by 'oom' on Tue Sep 1 20:55:56 UTC 2009 ************************************************************/ 2009-11-09 09:57:45,328 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Incompatible namespaceIDs in /tmp/hadoop-root/dfs/data: namenode namespaceID = 1016244663; datanode namespaceID = 1687029285 at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:233) at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:148) at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:298) at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:216) at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1283) at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1238) at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1246) at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1368) --- On Mon, 11/9/09, Boris Shkolnik <[email protected]> wrote: > From: Boris Shkolnik <[email protected]> > Subject: Re: newbie question - error with replication > To: [email protected] > Date: Monday, November 9, 2009, 5:02 PM > Make sure you have at least one > datanode running. > Look at the data node log file. (logs/*-datanode-*.log) > > Boris. > > > On 11/9/09 7:15 AM, "Raymond Jennings III" <[email protected]> > wrote: > > > I am trying to resolve an IOException error. I > have a basic setup and shortly > > after running start-dfs.sh I get a: > > > > error: java.io.IOException: File > > /tmp/hadoop-root/mapred/system/jobtracker.info could > only be replicated to 0 > > nodes, instead of 1 > > java.io.IOException: File > /tmp/hadoop-root/mapred/system/jobtracker.info could > > only be replicated to 0 nodes, instead of 1 > > > > Any pointers how to resolve this? Thanks! > > > > > > > > > >
