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HADOOP-12810. FileSystem#listLocatedStatus causes unnecessary RPC calls (Contributed by Ryan Blue)

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(cherry picked from commit 96ea3094315bb1e1a5e268e3817c7fdedc3e9462)
(cherry picked from commit 2bf5a005fab287689a148c1928f3b04c0a8dcedf)
This commit is contained in:
Vinayakumar B 2016-02-17 10:13:41 +05:30
parent c7be3deff7
commit e88c01fa58
2 changed files with 6 additions and 1 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -1019,6 +1019,9 @@ Release 2.7.3 - UNRELEASED
OPTIMIZATIONS
HADOOP-12810. FileSystem#listLocatedStatus causes unnecessary RPC calls
(Ryan Blue via vinayakumarb)
BUG FIXES
HADOOP-12296. when setnetgrent returns 0 in linux, exception should be

4
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
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@ -1732,8 +1732,10 @@ public LocatedFileStatus next() throws IOException {
throw new NoSuchElementException("No more entry in " + f);
}
FileStatus result = stats[i++];
// for files, use getBlockLocations(FileStatus, int, int) to avoid
// calling getFileStatus(Path) to load the FileStatus again
BlockLocation[] locs = result.isFile() ?
getFileBlockLocations(result.getPath(), 0, result.getLen()) :
getFileBlockLocations(result, 0, result.getLen()) :
null;
return new LocatedFileStatus(result, locs);
}