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Date: Thu, 10 Feb 2011 12:10:57 +0000 (UTC)
From: "Devaraj K (JIRA)" <jira@apache.org>
To: mapreduce-dev@hadoop.apache.org
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 <866735422.7782.1297339857717.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] Created: (MAPREDUCE-2317) HadoopArchives throwing
 NullPointerException while creating hadoop archives (.har files)
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HadoopArchives throwing NullPointerException while creating hadoop archives (.har files)
----------------------------------------------------------------------------------------

                 Key: MAPREDUCE-2317
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2317
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: harchive
    Affects Versions: 0.20.1, 0.23.0
         Environment: windows
            Reporter: Devaraj K
            Priority: Minor


While we are trying to run hadoop archive tool in widows using this way, it is giving the below exception.

java org.apache.hadoop.tools.HadoopArchives -archiveName temp.har D:/test/in E:/temp

{code:xml} 

java.lang.NullPointerException
	at org.apache.hadoop.tools.HadoopArchives.writeTopLevelDirs(HadoopArchives.java:320)
	at org.apache.hadoop.tools.HadoopArchives.archive(HadoopArchives.java:386)
	at org.apache.hadoop.tools.HadoopArchives.run(HadoopArchives.java:725)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
	at org.apache.hadoop.tools.HadoopArchives.main(HadoopArchives.java:739)

{code} 

I see the code flow to handle this feature in windows also, 

{code:title=Path.java|borderStyle=solid}

/** Returns the parent of a path or null if at root. */
  public Path getParent() {
    String path = uri.getPath();
    int lastSlash = path.lastIndexOf('/');
    int start = hasWindowsDrive(path, true) ? 3 : 0;
    if ((path.length() == start) ||               // empty path
        (lastSlash == start && path.length() == start+1)) { // at root
      return null;
    }
    String parent;
    if (lastSlash==-1) {
      parent = CUR_DIR;
    } else {
      int end = hasWindowsDrive(path, true) ? 3 : 0;
      parent = path.substring(0, lastSlash==end?end+1:lastSlash);
    }
    return new Path(uri.getScheme(), uri.getAuthority(), parent);
  }

{code} 

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