This a hadoop-side stack trace

it looks like the code is trying to get the filesystem permissions by running

%HADOOP_HOME%\bin\WINUTILS.EXE  ls -F


and something is triggering a null pointer exception.

There isn't any HADOOP- JIRA with this specific stack trace in it, so it's not 
a known/fixed problem.

At a guess, your environment HADOOP_HOME environment variable isn't point to 
the right place. If that's the case there should have been a warning in the logs




Py4JJavaError: An error occurred while calling 
z:org.apache.spark.api.python.PythonRDD.collectAndServe.
: java.lang.NullPointerException

at java.lang.ProcessBuilder.start(Unknown Source)

at org.apache.hadoop.util.Shell.runCommand(Shell.java:482)

at org.apache.hadoop.util.Shell.run(Shell.java:455)

at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:715)

at org.apache.hadoop.util.Shell.execCommand(Shell.java:808)

at org.apache.hadoop.util.Shell.execCommand(Shell.java:791)

at org.apache.hadoop.fs.FileUtil.execCommand(FileUtil.java:1097)

at 
org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.loadPermissionInfo(RawLocalFileSystem.java:582)

at 
org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.getPermission(RawLocalFileSystem.java:557)

at org.apache.hadoop.fs.LocatedFileStatus.<init>(LocatedFileStatus.java:42)

at org.apache.hadoop.fs.FileSystem$4.next(FileSystem.java:1699)

at org.apache.hadoop.fs.FileSystem$4.next(FileSystem.java:1681)

at 
org.apache.hadoop.mapred.FileInputFormat.singleThreadedListStatus(FileInputFormat.java:268)

at org.apache.hadoop.mapred.FileInputFormat.listStatus(FileInputFormat.java:228)

at org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:313)

at org.apache.spark.rdd.HadoopRDD.getPartitions(HadoopRDD.scala:203)

at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)

at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)

at scala.Option.getOrElse(Option.scala:120)

at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)

at 
org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)

at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)

at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)

at scala.Option.getOrElse(Option.scala:120)

at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)

at org.apache.spark.api.python.PythonRDD.getPartitions(PythonRDD.scala:57)

at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)

at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)

at scala.Option.getOrElse(Option.scala:120)

at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)

at org.apache.spark.SparkContext.runJob(SparkContext.scala:1512)

at org.apache.spark.rdd.RDD.collect(RDD.scala:813)

at org.apache.spark.api.python.PythonRDD$.collectAndServe(PythonRDD.scala:374)

at org.apache.spark.api.python.PythonRDD.collectAndServe(PythonRDD.scala)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231)

at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:379)

at py4j.Gateway.invoke(Gateway.java:259)

at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133)

at py4j.commands.CallCommand.execute(CallCommand.java:79)

at py4j.GatewayConnection.run(GatewayConnection.java:207)

at java.lang.Thread.run(Unknown Source)

--
Best Regards,
Ayan Guha





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