Hi, We are using Spark with data files on HDFS. The files are stored as files for predefined hadoop user ("hdfs").
The folder is permitted with · read write, executable and read permission for the hdfs user · executable and read permission for users in the group · just read permission for all other users now the Spark write operation fails, due to a user mismatch of the spark context and the Hadoop user permission. Is there a way to start the Spark Context with another user than the one configured on the local machine? Please the technical details below: The permission on the hdfs folder "/tmp/Iris" is as follows: drwxr-xr-x - hdfs hadoop 0 2014-04-10 14:12 /tmp/Iris The Spark context is initiated on my local machine and according to the configured hdfs permission "rwxr-xr-x" there is no problem in loading the Hadoop hdfs file into a rdd: final JavaRDD<String> rdd = sparkContext.textFile(filePath); But saving the resulted rdd back to Hadoop resulst in an Hadoop security exception: rdd.saveAsTextFile("/tmp/Iris/output"); Then the I receive the following Hadoop security exception: org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException: *Permission denied: user=halbani, access=WRITE, inode="/tmp/Iris":hdfs:hadoop:drwxr-xr-x* at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:95) at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:57) at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:1428) at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFileSystem.java:332) at org.apache.hadoop.fs.FileSystem.mkdirs(FileSystem.java:1126) at org.apache.hadoop.mapred.FileOutputCommitter.setupJob(FileOutputCommitter.java:52) at org.apache.hadoop.mapred.SparkHadoopWriter.preSetup(SparkHadoopWriter.scala:65) at org.apache.spark.rdd.PairRDDFunctions.saveAsHadoopDataset(PairRDDFunctions.scala:713) at org.apache.spark.rdd.PairRDDFunctions.saveAsHadoopFile(PairRDDFunctions.scala:686) at org.apache.spark.rdd.PairRDDFunctions.saveAsHadoopFile(PairRDDFunctions.scala:572) at org.apache.spark.rdd.RDD.saveAsTextFile(RDD.scala:894) at org.apache.spark.api.java.JavaRDDLike$class.saveAsTextFile(JavaRDDLike.scala:355) at org.apache.spark.api.java.JavaRDD.saveAsTextFile(JavaRDD.scala:27) at org.apache.spark.reader.FileSpliter.split(FileSpliter.java:73) at org.apache.spark.reader.FileReaderMain.main(FileReaderMain.java:17) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120) Caused by: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.security.AccessControlException: Permission denied: user=halbani, access=WRITE, inode="/tmp/Iris":hdfs:hadoop:drwxr-xr-x at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:225) at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:205) at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:151) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5951) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkAncestorAccess(FSNamesystem.java:5924) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:2628) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:2593) at org.apache.hadoop.hdfs.server.namenode.NameNode.mkdirs(NameNode.java:927) at sun.reflect.GeneratedMethodAccessor132.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:587) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1444) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1440) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1438) at org.apache.hadoop.ipc.Client.call(Client.java:1107) at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229) at $Proxy7.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:601) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62) at $Proxy7.mkdirs(Unknown Source) at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:1426) ... 17 more Apparently is the Spark context is initiated with the user on the local machine. Is there a way to start the Spark Context with another user then the one configured on the local machine?