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From "Jakob Homan (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8229) DistCp doesn't handle non-existent paths correctly
Date Thu, 29 Mar 2012 22:09:26 GMT
DistCp doesn't handle non-existent paths correctly
--------------------------------------------------

                 Key: HADOOP-8229
                 URL: https://issues.apache.org/jira/browse/HADOOP-8229
             Project: Hadoop Common
          Issue Type: Bug
    Affects Versions: 1.0.0, 0.20.2
            Reporter: Jakob Homan


Assume /user/jhoman/blork doesn't exist:
{noformat}[tardis]$ hadoop distcp 'hftp://nn:50070/user/jhoman/blork' /tmp/plork
12/03/29 22:04:33 INFO tools.DistCp: srcPaths=[hftp://nn:50070/user/jhoman/blork]
12/03/29 22:04:33 INFO tools.DistCp: destPath=/tmp/plork
[Fatal Error] :1:173: XML document structures must start and end within the same entity.
With failures, global counters are inaccurate; consider running with -i
Copy failed: java.io.IOException: invalid xml directory content
	at org.apache.hadoop.hdfs.HftpFileSystem$LsParser.fetchList(HftpFileSystem.java:427)
	at org.apache.hadoop.hdfs.HftpFileSystem$LsParser.getFileStatus(HftpFileSystem.java:432)
	at org.apache.hadoop.hdfs.HftpFileSystem.getFileStatus(HftpFileSystem.java:461)
	at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:768)
	at org.apache.hadoop.tools.DistCp.checkSrcPath(DistCp.java:636)
	at org.apache.hadoop.tools.DistCp.copy(DistCp.java:656)
	at org.apache.hadoop.tools.DistCp.run(DistCp.java:881)
	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.DistCp.main(DistCp.java:908)
Caused by: org.xml.sax.SAXParseException: XML document structures must start and end within
the same entity.
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1231)
	at org.apache.hadoop.hdfs.HftpFileSystem$LsParser.fetchList(HftpFileSystem.java:421)
	... 9 more{noformat}
This is because the ListPathsServlet hits an NPE when it calls nnproxy.getFileInfo(path);
on the non-existent path and just bails, leaving the resulting XML unformed.

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