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I am trying to setup Hadoop cluster on Fedora 17.
When I give /bin/star-all.sh command daemons are getting started on masters and slaves nodes.
But when I view log file for data node on master node I get following EROOR
ERROR org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:hadoop1 cause:java.io.IOException: File /home/hadoop1/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1
2013-03-23 15:37:08,205 INFO org.apache.hadoop.ipc.Server: IPC Server handler 5 on 9100, call addBlock(/home/hadoop1/mapred/system/jobtracker.info, DFSClient_-838454688, null) from 127.0.0.1:40173: error: java.io.IOException: File /home/hadoop1/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1 java.io.IOException: File /home/hadoop1/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558) at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)
I am also trying to run wordcound program. While copying data into HDFS using command
$bin/hadoop dfs -copyFromLocal /home/hadoop1/Documents/wordcount/ /home/hadoop1/hdfs/data I get following error
WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /home/hadoop1/hdfs/data/wordcount/pg20417.txt could only be replicated to 0 nodes, instead of 1 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558) at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696) at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)
at org.apache.hadoop.ipc.Client.call(Client.java:1070)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
at $Proxy1.addBlock(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
at $Proxy1.addBlock(Unknown Source)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3510)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3373)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2589)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2829)
13/03/23 15:41:05 WARN hdfs.DFSClient: Error Recovery for block null bad datanode[0] nodes == null 13/03/23 15:41:05 WARN hdfs.DFSClient: Could not get block locations. Source file "/home/hadoop1/hdfs/data/wordcount/pg20417.txt" - Aborting... copyFromLocal: java.io.IOException: File /home/hadoop1/hdfs/data/wordcount/pg20417.txt could only be replicated to 0 nodes, instead of 1 13/03/23 15:41:05 ERROR hdfs.DFSClient: Exception closing file /home/hadoop1/hdfs/data/wordcount/pg20417.txt : org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /home/hadoop1/hdfs/data/wordcount/pg20417.txt could only be replicated to 0 nodes, instead of 1 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558) at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696) at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)
Help in this regard is appreciated..
332
When a file is written to HDFS, it is replicated to multiple core nodes. When you see this error, it means that the NameNode daemon does not have any available DataNode instances to write data to in HDFS. In other words, block replication is not taking place.
Datanode daemon should be started manually using $HADOOP_HOME/bin/hadoop-daemon.sh script. Master (NameNode) should correspondingly join the cluster after automatically contacted. New node should be added to the configuration/slaves file in the master server. New node will be identified by script-based commands.
I managed to solve this issue...
Step I) There was firewall active on master and slaves node machines.. I disabled it by following command "systemctl disable iptables.service"
Step II) I wrongly assigned "hdfs://localhost:9100" to "fs.default.name" in slave's core-sites.xml configuration file. I changed it to "hdfs://master:9100"
Now my Hadoop Cluster is Up..
Thank You Chris for your kind help...
119
My reason for this error was not enough space on disk (~200MB was not enough).
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