You reformatted your NameNode at some point, but likely failed to also clear out the DN data directories, which would not auto-wipe themselves.
Clear the contents of /app/hadoop/tmp/dfs/data at the DN and it should start up the next time you invoke it. P.s. Please do not email [email protected] with any user questions. It exists for project level discussions and announcements. On Sat, Jan 25, 2014 at 11:15 AM, Pranav Gadekar <[email protected]> wrote: > This is my log file. > > 014-01-24 17:24:58,238 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: > STARTUP_MSG: > /************************************************************ > STARTUP_MSG: Starting DataNode > STARTUP_MSG: host = user/127.0.1.1 > STARTUP_MSG: args = [] > STARTUP_MSG: version = 1.2.1 > STARTUP_MSG: build = > https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.2 -r > 1503152; compiled by 'mattf' on Mon Jul 22 15:23:09 PDT 2013 > STARTUP_MSG: java = 1.6.0_27 > ************************************************************/ > 2014-01-24 17:24:58,622 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: > loaded properties from hadoop-metrics2.properties > 2014-01-24 17:24:58,669 INFO > org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source > MetricsSystem,sub=Stats registered. > 2014-01-24 17:24:58,670 INFO > org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period > at 10 second(s). > 2014-01-24 17:24:58,670 INFO > org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system > started > 2014-01-24 17:24:58,877 INFO > org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi > registered. > 2014-01-24 17:24:58,880 WARN > org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already > exists! > 2014-01-24 17:25:10,778 ERROR > org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: > Incompatible namespaceIDs in /app/hadoop/tmp/dfs/data: namenode namespaceID > = 102782159; datanode namespaceID = 1227483104 > at > org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:232) > at > org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:147) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:414) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:321) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1712) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1651) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1669) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1795) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1812) > > 2014-01-24 17:25:10,779 INFO > org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: > /************************************************************ > SHUTDOWN_MSG: Shutting down DataNode at user/127.0.1.1 > ************************************************************/ > 2014-01-24 17:26:13,413 INFO > org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG: > /************************************************************ > STARTUP_MSG: Starting DataNode > STARTUP_MSG: host = user/127.0.1.1 > STARTUP_MSG: args = [] > STARTUP_MSG: version = 1.2.1 > STARTUP_MSG: build = > https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.2 -r > 1503152; compiled by 'mattf' on Mon Jul 22 15:23:09 PDT 2013 > STARTUP_MSG: java = 1.6.0_27 > ************************************************************/ > 2014-01-24 17:26:13,510 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: > loaded properties from hadoop-metrics2.properties > 2014-01-24 17:26:13,518 INFO > org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source > MetricsSystem,sub=Stats registered. > 2014-01-24 17:26:13,518 INFO > org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period > at 10 second(s). > 2014-01-24 17:26:13,518 INFO > org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system > started > 2014-01-24 17:26:13,626 INFO > org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi > registered. > 2014-01-24 17:26:13,628 WARN > org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already > exists! > 2014-01-24 17:26:28,860 ERROR > org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: > Incompatible namespaceIDs in /app/hadoop/tmp/dfs/data: namenode namespaceID > = 102782159; datanode namespaceID = 1227483104 > at > org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:232) > at > org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:147) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:414) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:321) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1712) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1651) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1669) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1795) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1812) > > 2014-01-24 17:26:28,860 INFO > org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: > /************************************************************ > SHUTDOWN_MSG: Shutting down DataNode at user/127.0.1.1 > ************************************************************/ > > > Shutdown command is initialised automatically. > Please take a look and respond with a solution. -- Harsh J
