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https://issues.apache.org/jira/browse/HADOOP-10969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Steve Loughran resolved HADOOP-10969.
-------------------------------------
Resolution: Invalid
> RawLocalFileSystem.setPermission throws Exception on windows
> ------------------------------------------------------------
>
> Key: HADOOP-10969
> URL: https://issues.apache.org/jira/browse/HADOOP-10969
> Project: Hadoop Common
> Issue Type: Bug
> Environment: hadoop 2.3.0, Windows Environment, Development using
> Eclipse, Lenevo Laptop
> Reporter: Venkatesh
> Priority: Blocker
>
> I'm an application developer. We recently moved from CDH4.7 to CDH5.1. The
> hadoop version have been from 1.x to 2.x. In order to perform development on
> Eclipse (on WINDOWS), the following class was created
> public class WindowsLocalFileSystem extends LocalFileSystem {
> public WindowsLocalFileSystem() {
> super();
> }
> @Override
> public boolean mkdirs(Path f, FsPermission permission) throws
> IOException {
> final boolean result = super.mkdirs(f);
> this.setPermission(f, permission);
> return result;
>
> }
> @Override
> public void setPermission(Path p, FsPermission permission)
> throws IOException {
> try {
> super.setPermission(p, permission);
> } catch (final IOException e) {
> System.err.println("Cant help it, hence ignoring
> IOException setting persmission for path \"" + p +
> "\": " + e.getMessage());
> }
> }
> }
> This class was used in MapReduce Job as
> if (RUN_LOCAL) {
> conf.set("fs.default.name", "file:///");
> conf.set("mapred.job.tracker", "local");
> conf.set("fs.file.impl",
>
> "org.scif.bdp.mrjobs.WindowsLocalFileSystem");
> conf.set(
> "io.serializations",
>
> "org.apache.hadoop.io.serializer.JavaSerialization,"
> +
> "org.apache.hadoop.io.serializer.WritableSerialization");
> }
> It worked fine on CDH4.7. Now the same code when compiled on CDH5.1 works but
> when I try to execute it throws the following stacktrace
> Exception in thread "main" java.lang.NullPointerException
> at java.lang.ProcessBuilder.start(ProcessBuilder.java:1010)
> at org.apache.hadoop.util.Shell.runCommand(Shell.java:451)
> at org.apache.hadoop.util.Shell.run(Shell.java:424)
> at
> org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:656)
> at org.apache.hadoop.util.Shell.execCommand(Shell.java:745)
> at org.apache.hadoop.util.Shell.execCommand(Shell.java:728)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:633)
> at
> org.apache.hadoop.fs.FilterFileSystem.setPermission(FilterFileSystem.java:467)
> at
> com.scif.bdp.common.WindowsLocalFileSystem.setPermission(WindowsLocalFileSystem.java:26)
> at
> com.scif.bdp.common.WindowsLocalFileSystem.mkdirs(WindowsLocalFileSystem.java:17)
> at
> org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:125)
> at
> org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:348)
> at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1295)
> at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1292)
> 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:1554)
> at org.apache.hadoop.mapreduce.Job.submit(Job.java:1292)
> at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1313)
> at com.scif.bdp.mrjobs.DeDup.run(DeDup.java:55)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
> at com.scif.bdp.mrjobs.DeDup.main(DeDup.java:59)
> (Note DeDup is my MR class to remove duplicates)
> Upon investigation the only change I saw was the change in method
> .setPermission(). It invokes Native.POSIX.chmod as against Native.chmod
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