Every time when hadoop builds, it also builds the hadoop eclipse plug-in using the latest hadoop core jar. In your case eclipse plug-in contains the other version jar and cluster is running with other version. That's why it is giving the version mismatch error.
Just replace the hadoop-core jar in your eclipse plug-in with the jar whatever the hadoop cluster is using and check. Devaraj K _____ From: praveenesh kumar [mailto:praveen...@gmail.com] Sent: Wednesday, June 22, 2011 12:07 PM To: common-user@hadoop.apache.org; devara...@huawei.com Subject: Re: Hadoop eclipse plugin stopped working after replacing hadoop-0.20.2 jar files with hadoop-0.20-append jar files I followed michael noll's tutorial for making hadoop-0-20-append jars.. http://www.michael-noll.com/blog/2011/04/14/building-an-hadoop-0-20-x-versio n-for-hbase-0-90-2/ After following the article.. we get 5 jar files which we need to replace it from hadoop.0.20.2 jar file. There is no jar file for hadoop-eclipse plugin..that I can see in my repository if I follow that tutorial. Also the hadoop-plugin I am using..has no info on JIRA MAPREDUCE-1280 regarding whether it is compatible with hadoop-0.20-append. Does anyone else. faced this kind of issue ??? Thanks, Praveenesh On Wed, Jun 22, 2011 at 11:48 AM, Devaraj K <devara...@huawei.com> wrote: Hadoop eclipse plugin also uses hadoop-core.jar file communicate to the hadoop cluster. For this it needs to have same version of hadoop-core.jar for client as well as server(hadoop cluster). Update the hadoop eclipse plugin for your eclipse which is provided with hadoop-0.20-append release, it will work fine. Devaraj K -----Original Message----- From: praveenesh kumar [mailto:praveen...@gmail.com] Sent: Wednesday, June 22, 2011 11:25 AM To: common-user@hadoop.apache.org Subject: Hadoop eclipse plugin stopped working after replacing hadoop-0.20.2 jar files with hadoop-0.20-append jar files Guys, I was using hadoop eclipse plugin on hadoop 0.20.2 cluster.. It was working fine for me. I was using Eclipse SDK Helios 3.6.2 with the plugin "hadoop-eclipse-plugin-0.20.3-SNAPSHOT.jar" downloaded from JIRA MAPREDUCE-1280 Now for Hbase installation.. I had to use hadoop-0.20-append compiled jars..and I had to replace the old jar files with new 0.20-append compiled jar files.. But now after replacing .. my hadoop eclipse plugin is not working well for me. Whenever I am trying to connect to my hadoop master node from that and try to see DFS locations.. it is giving me the following error: * Error : Protocol org.apache.hadoop.hdfs.protocol.clientprotocol version mismatch (client 41 server 43)* However the hadoop cluster is working fine if I go directly on hadoop namenode use hadoop commands.. I can add files to HDFS.. run jobs from there.. HDFS web console and Map-Reduce web console are also working fine. but not able to use my previous hadoop eclipse plugin. Any suggestions or help for this issue ? Thanks, Praveenesh
