Hi Phil, Typically, this is due to running inconsistent versions of the Hadoop, right?
I would compare the output of 'md5sum' on the NN versus the DN for the various Hadoop JARs. If you do "jar tf" on the jar you added to $HADOOP_HOME/lib, did it inadvertently add another implementation of the NN classes? Brian On Oct 25, 2010, at 6:12 PM, phil young wrote: > Wow. I could use help quickly... > > My name node is reporting a null BV. All the data nodes report the same > Build Version. > We were not upgrading the DFS, but did stop, restart, after adding a jar to > $HADOOP_HOME/lib. > So, we think we understand the cause. > > Web searching shows a number of people have had this issue, but I don't see > a response to the plea here for advice on repairing the problem: > http://old.nabble.com/namenode-failure-td20199395.html > > > -- Here's a log from a DataNode > /************************************************************ > STARTUP_MSG: Starting DataNode > STARTUP_MSG: host = hdp12n.tripadvisor.com/192.168.33.231 > STARTUP_MSG: args = [] > STARTUP_MSG: version = 0.20.2 > STARTUP_MSG: build = > https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r > 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010 > ************************************************************/ > 2010-10-25 18:23:07,081 FATAL > org.apache.hadoop.hdfs.server.datanode.DataNode: Incompatible build > versions: namenode BV = ; datanode BV = 911707 > 2010-10-25 18:23:07,186 ERROR > org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: > Incompatible build versions: namenode BV = ; datanode BV = 911707 > at > org.apache.hadoop.hdfs.server.datanode.DataNode.handshake(DataNode.java:436) > at > org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:275) > 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) > > 2010-10-25 18:23:07,187 INFO > org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: > /************************************************************ > SHUTDOWN_MSG: Shutting down DataNode at > hdp12n.tripadvisor.com/192.168.33.231 > > -- This is from the NameNode > > 2010-10-25 18:38:58,760 INFO > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit: > ugi=root,root,bin,daemon,sys,adm,disk,wheel ip=/192.168.33.230 > cmd=listStatus src=/disk1/hadoop-root/mapred/system dst=null perm=null > 2010-10-25 18:38:58,764 INFO org.apache.hadoop.ipc.Server: IPC Server > handler 9 on 54310, call delete(/disk1/hadoop-root/mapred/system, true) from > 192.168.33.230:44574: error: > org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot delete > /disk1/hadoop-root/mapred/system. Name node is in safe mode. > The ratio of reported blocks 0.0000 has not reached the threshold 0.9990. > Safe mode will be turned off automatically. > org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot delete > /disk1/hadoop-root/mapred/system. Name node is in safe mode. > The ratio of reported blocks 0.0000 has not reached the threshold 0.9990. > Safe mode will be turned off automatically. > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.deleteInternal(FSNamesystem.java:1700) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.delete(FSNamesystem.java:1680) > at org.apache.hadoop.hdfs.server.namenode.NameNode.delete(NameNode.java:517) > at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) > 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) > 2010-10-25 18:39:08,770 INFO > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit: > ugi=root,root,bin,daemon,sys,adm,disk,wheel ip=/192.168.33.230 > cmd=listStatus src=/disk1/hadoop-root/mapred/system dst=null perm=null > 2010-10-25 18:39:08,774 INFO org.apache.hadoop.ipc.Server: IPC Server > handler 0 on 54310, call delete(/disk1/hadoop-root/mapred/system, true) from > 192.168.33.230:44574: error: > org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot delete > /disk1/hadoop-root/mapred/system. Name node is in safe mode. > The ratio of reported blocks 0.0000 has not reached the threshold 0.9990. > Safe mode will be turned off automatically. > org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot delete > /disk1/hadoop-root/mapred/system. Name node is in safe mode. > The ratio of reported blocks 0.0000 has not reached the threshold 0.9990. > Safe mode will be turned off automatically. > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.deleteInternal(FSNamesystem.java:1700) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.delete(FSNamesystem.java:1680) > at org.apache.hadoop.hdfs.server.namenode.NameNode.delete(NameNode.java:517) > at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) > 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) > 2010-10-25 18:39:09,504 INFO > org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG: > /************************************************************ > SHUTDOWN_MSG: Shutting down NameNode at > hdp11an.tripadvisor.com/192.168.33.228 > ************************************************************/ > > [r...@hdp11an current]# ls -l /disk1/hadoop-root/ > total 4 > drwxr-xr-x 4 root root 4096 Oct 22 10:11 hadoop-unjar1448904914513586870
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