File jobtracker.info could only be replicated to 0 nodes, instead of 1

6
votes

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..

4
hadoop
Check the logs for your name node - do you have any data nodes connected? If not then check the logs for the data nodes. This question has been asked a number of times and usually the cause is either the data nodes are not running, or the dfs.data.dir is configured on the tmp directory, which is cleared when machine restart – Chris White
I checked datanode log.. It reads Retrying connect to server:localhost/127.0.0.1:9100: Already tried 9 times... last line of log file is Server at localhost/127.0.0.1:9100 not available yet. I am new to Hadoop.. What could be the reason of this error.. – user2201980
I tried modifying some config files.. Now I am getting NORouteToHostException at Datanode machine..Is it the issue of firewall blocking ports?? We have SonicWall firewall installed in college premises... – user2201980
Are you trying to run in a pseudo cluster (all on the same machine?) or real cluster with 2+ machines? – Chris White

4 Answers

2
votes

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...

1
votes

My reason for this error was not enough space on disk (~200MB was not enough).

0
votes

I delete jobtracker.info on HDFS, then it works. Hadoop seems to remake it

0
votes

One more reason for this error (which I encountered) is a messed up /etc/hosts file causing namenode to listen only on the loopback interface.

This caused datanodes not to connect to namenode and replication level was not reached as a side effect. See namenode rejecting connections bug for more detail.