DistCp doesn't handle non-existent paths correctly
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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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