this is windows, isn't it? you're missing a winutils.exe in the right place, and hadoop core isn't providing anything meaningful. Hadoop 2.8 will provide more diagnostics, including a link to this wiki page:
https://wiki.apache.org/hadoop/WindowsProblems On 5 Oct 2015, at 05:26, Julius Fernandes <julius.oli...@gmail.com<mailto:julius.oli...@gmail.com>> wrote: Caused by: java.lang.NullPointerException at java.lang.ProcessBuilder.start(ProcessBuilder.java:1010) 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.hive.ql.session.SessionState.createRootHDFSDir(SessionState.java:599) at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:554) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:508) ... 56 more
