hadoop MapReduce exception with multiple nodes

I include a self-contained sequence of commands that lead to the issue. I have a work-in-progress Cluster configuration. It is also worth noting that this same example worked fine when I didn't have all the resource and history managers configured in `yarn-site.xml` and `mapred-site.xml`. The problem `Cannot create directory /user/deploy/QuasiMonteCarlo_1391523248477_997612342/in` appears to be a wrong file path prefix somewhere because the relevant user directories are: - `/home/deploy/` - `/home/deploy/hdfs` - `/home/deploy/hdfs/name` - `/home/deploy/hdfs/data` So how come it tries accessing `/user/deploy` ? ``` deploy@olympus:~$ start-all.sh This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh Starting namenodes on [olympus] olympus: starting namenode, logging to /opt/dev/hadoop/2.2.0/logs/hadoop-deploy-namenode-olympus.out hera: starting datanode, logging to /opt/dev/hadoop/2.2.0/logs/hadoop-deploy-datanode-hera.out olympus: starting datanode, logging to /opt/dev/hadoop/2.2.0/logs/hadoop-deploy-datanode-olympus.out zeus: starting datanode, logging to /opt/dev/hadoop/2.2.0/logs/hadoop-deploy-datanode-zeus.out poseidon: starting datanode, logging to /opt/dev/hadoop/2.2.0/logs/hadoop-deploy-datanode-poseidon.out Starting secondary namenodes [0.0.0.0] 0.0.0.0: starting secondarynamenode, logging to /opt/dev/hadoop/2.2.0/logs/hadoop-deploy-secondarynamenode-olympus.out starting yarn daemons starting resourcemanager, logging to /opt/dev/hadoop/2.2.0/logs/yarn-deploy-resourcemanager-olympus.out olympus: starting nodemanager, logging to /opt/dev/hadoop/2.2.0/logs/yarn-deploy-nodemanager-olympus.out zeus: starting nodemanager, logging to /opt/dev/hadoop/2.2.0/logs/yarn-deploy-nodemanager-zeus.out hera: starting nodemanager, logging to /opt/dev/hadoop/2.2.0/logs/yarn-deploy-nodemanager-hera.out poseidon: starting nodemanager, logging to /opt/dev/hadoop/2.2.0/logs/yarn-deploy-nodemanager-poseidon.out deploy@olympus:~$ hadoop jar $HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.2.0.jar pi 2 5 Number of Maps = 2 Samples per Map = 5 org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create directory /user/deploy/QuasiMonteCarlo_1391523248477_997612342/in. Name node is in safe mode. The reported blocks 5 has reached the threshold 0.9990 of total blocks 5. The number of live datanodes 4 has reached the minimum number 0. Safe mode will be turned off automatically in 4 seconds. at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInt(FSNamesystem.java:3355) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:3330) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:724) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:502) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:59598) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2048) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2044) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2042) at org.apache.hadoop.ipc.Client.call(Client.java:1347) at org.apache.hadoop.ipc.Client.call(Client.java:1300) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206) at com.sun.proxy.$Proxy9.mkdirs(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:606) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:186) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102) at com.sun.proxy.$Proxy9.mkdirs(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.mkdirs(ClientNamenodeProtocolTranslatorPB.java:467) at org.apache.hadoop.hdfs.DFSClient.primitiveMkdir(DFSClient.java:2394) at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:2365) at org.apache.hadoop.hdfs.DistributedFileSystem$16.doCall(DistributedFileSystem.java:817) at org.apache.hadoop.hdfs.DistributedFileSystem$16.doCall(DistributedFileSystem.java:813) at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81) at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirsInternal(DistributedFileSystem.java:813) at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFileSystem.java:806) at org.apache.hadoop.fs.FileSystem.mkdirs(FileSystem.java:1933) at org.apache.hadoop.examples.QuasiMonteCarlo.estimatePi(QuasiMonteCarlo.java:282) at org.apache.hadoop.examples.QuasiMonteCarlo.run(QuasiMonteCarlo.java:354) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.hadoop.examples.QuasiMonteCarlo.main(QuasiMonteCarlo.java:363) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72) at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144) at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74) 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:606) at org.apache.hadoop.util.RunJar.main(RunJar.java:212) ```