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From "shanyu zhao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-9774) RawLocalFileSystem.listStatus() return absolution paths when input path is relative on Windows
Date Fri, 26 Jul 2013 00:57:49 GMT
shanyu zhao created HADOOP-9774:
-----------------------------------

             Summary: RawLocalFileSystem.listStatus() return absolution paths when input path
is relative on Windows
                 Key: HADOOP-9774
                 URL: https://issues.apache.org/jira/browse/HADOOP-9774
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs
    Affects Versions: 0.23.9, 0.23.8, 0.23.7, 0.23.6, 0.23.5
            Reporter: shanyu zhao


On Windows, when using RawLocalFileSystem.listStatus() to enumerate a relative path (without
drive spec), e.g., "file:///mydata", the resulting paths become absolute paths, e.g., ["file://E:/mydata/t1.txt",
"file://E:/mydata/t2.txt"...].
Note that if we use it to enumerate an absolute path, e.g., "file://E:/mydata" then the we
get the same results as above.

This breaks some hive unit tests which uses local file system to simulate HDFS when testing,
therefore the drive spec is removed. Then after listStatus() the path is changed to absolute
path, hive failed to find the path in its map reduce job.

You'll see the following exception:
[junit] java.io.IOException: cannot find dir = pfile:/E:/GitHub/hive-monarch/build/ql/test/data/warehouse/src/kv1.txt
in pathToPartitionInfo: [pfile:/GitHub/hive-monarch/build/ql/test/data/warehouse/src]
[junit] 	at org.apache.hadoop.hive.ql.io.HiveFileFormatUtils.getPartitionDescFromPathRecursively(HiveFileFormatUtils.java:298)


This problem is introduced by this JIRA:
HADOOP-8962

Prior to the fix for HADOOP-8962 (merged in 0.23.5), the resulting paths are relative paths
if the parent paths are relative, e.g., ["file:///mydata/t1.txt", "file:///mydata/t2.txt"...]

This behavior change is a side effect of the fix in HADOOP-8962, not an intended change. The
resulting behavior, even though is legitimate from a function point of view, break consistency
from the caller's point of view. When the caller use a relative path (without drive spec)
to do listStatus() the resulting path should be relative. Therefore, I think this should be
fixed.

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