Hi, I'm using hadoop-0.17.0 and recently, when i stopped and restarted dfs, the datanodes are being created and soon, they r not present. the logs of namenode shows the following error: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at 172.16.45.171/172.16.45.171 ************************************************************/ 2008-07-16 10:13:34,885 INFO org.apache.hadoop.dfs.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = 172.16.45.171/172.16.45.171 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.17.1-dev STARTUP_MSG: build = -r ; compiled by 'jobs' on Wed Jul 16 10:13:11 IST 2008 ************************************************************/ 2008-07-16 10:13:34,973 INFO org.apache.hadoop.ipc.metrics.RpcMetrics: Initializing RPC Metrics with hostName=NameNode, port=9000 2008-07-16 10:13:35,011 INFO org.apache.hadoop.dfs.NameNode: Namenode up at: 172.16.45.171/172.16.45.171:9000 2008-07-16 10:13:35,015 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: Initializing JVM Metrics with processName=NameNode, sessionId=null 2008-07-16 10:13:35,017 INFO org.apache.hadoop.dfs.NameNodeMetrics: Initializing NameNodeMeterics using context object:org.apache.hadoop.metrics.spi.NullContext 2008-07-16 10:13:35,060 INFO org.apache.hadoop.fs.FSNamesystem: fsOwner=jobs,jobs 2008-07-16 10:13:35,060 INFO org.apache.hadoop.fs.FSNamesystem: supergroup=supergroup 2008-07-16 10:13:35,060 INFO org.apache.hadoop.fs.FSNamesystem: isPermissionEnabled=true 2008-07-16 10:14:44,869 INFO org.apache.hadoop.fs.FSNamesystem: Finished loading FSImage in 69827 msecs 2008-07-16 10:14:44,870 INFO org.apache.hadoop.dfs.StateChange: STATE* Leaving safe mode after 69 secs. 2008-07-16 10:14:44,871 INFO org.apache.hadoop.dfs.StateChange: STATE* Network topology has 0 racks and 0 datanodes 2008-07-16 10:14:44,871 INFO org.apache.hadoop.dfs.StateChange: STATE* UnderReplicatedBlocks has 0 blocks 2008-07-16 10:14:44,877 INFO org.apache.hadoop.fs.FSNamesystem: Registered FSNamesystemStatusMBean 2008-07-16 10:14:44,930 INFO org.mortbay.util.Credential: Checking Resource aliases 2008-07-16 10:14:44,993 INFO org.mortbay.http.HttpServer: Version Jetty/5.1.4 2008-07-16 10:14:44,993 INFO org.mortbay.util.Container: Started HttpContext[/static,/static] 2008-07-16 10:14:44,993 INFO org.mortbay.util.Container: Started HttpContext[/logs,/logs] 2008-07-16 10:14:45,190 INFO org.mortbay.util.Container: Started [EMAIL PROTECTED] 2008-07-16 10:14:45,219 INFO org.mortbay.util.Container: Started WebApplicationContext[/,/] 2008-07-16 10:14:45,221 INFO org.mortbay.http.SocketListener: Started SocketListener on 0.0.0.0:50070 2008-07-16 10:14:45,221 INFO org.mortbay.util.Container: Started [EMAIL PROTECTED] 2008-07-16 10:14:45,221 INFO org.apache.hadoop.fs.FSNamesystem: Web-server up at: 0.0.0.0:50070 2008-07-16 10:14:45,307 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.174:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:45,308 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.178:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:45,308 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.176:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:45,308 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.177:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:45,309 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.172:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:45,309 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.175:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:45,309 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.179:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:45,311 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.173:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:45,341 INFO org.apache.hadoop.dfs.NameNode: Error report from 172.16.45.180:50010: Incompatible build versions: namenode BV = ; datanode BV = 656523 2008-07-16 10:14:49,224 INFO org.apache.hadoop.fs.FSNamesystem: Number of transactions: 1 Total time for transactions(ms): 1 Number of syncs: 0 SyncTimes(ms): 0 2008-07-16 10:19:45,726 INFO org.apache.hadoop.fs.FSNamesystem: Roll Edit Log from 172.16.45.171 2008-07-16 10:19:45,726 INFO org.apache.hadoop.fs.FSNamesystem: Number of transactions: 3 Total time for transactions(ms): 2 Number of syncs: 3 SyncTimes(ms): 5 2008-07-16 10:21:05,432 INFO org.apache.hadoop.fs.FSNamesystem: Roll FSImage from 172.16.45.171 2008-07-16 10:21:05,469 INFO org.apache.hadoop.fs.FSNamesystem: Number of transactions: 0 Total time for transactions(ms): 0 Number of syncs: 0 SyncTimes(ms): 0 2008-07-16 10:21:18,304 INFO org.apache.hadoop.dfs.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at 172.16.45.171/172.16.45.171 ************************************************************/
On seeing the mailist list archives, i found that you heard or experienced this problem earlier. I also realised that namenode was being compiled by 'jobs' (our username) whereas the datanode is being compiled/built by "hadoopqa" How do i overcome this problem? Please help Thanks, V.V.Chaitanya Krishna B.Tech, IIIT,Hyderabad India.
