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Addendum patch for HADOOP-9652 to fix performance problems. Contributed by Andrew Wang 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1561038 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jason Darrell Lowe 2014-01-24 15:45:28 +00:00
parent 817be26c17
commit 20176840f6
3 changed files with 18 additions and 4 deletions
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6
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -424,6 +424,9 @@ Release 2.4.0 - UNRELEASED
HADOOP-10143 replace WritableFactories's hashmap with ConcurrentHashMap
(Liang Xie via stack)
HADOOP-9652. Allow RawLocalFs#getFileLinkStatus to fill in the link owner
and mode if requested. (Andrew Wang via Colin Patrick McCabe)
OPTIMIZATIONS
HADOOP-9748. Reduce blocking on UGI.ensureInitialized (daryn)
@ -450,9 +453,6 @@ Release 2.4.0 - UNRELEASED
HADOOP-9817. FileSystem#globStatus and FileContext#globStatus need to work
with symlinks. (Colin Patrick McCabe via Andrew Wang)
HADOOP-9652. RawLocalFs#getFileLinkStatus does not fill in the link owner
and mode. (Andrew Wang via Colin Patrick McCabe)
HADOOP-9875. TestDoAsEffectiveUser can fail on JDK 7. (Aaron T. Myers via
Colin Patrick McCabe)

11
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/RawLocalFileSystem.java
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@ -16,8 +16,11 @@
* limitations under the License.
*/
package org.apache.hadoop.fs;
import com.google.common.annotations.VisibleForTesting;
import java.io.BufferedOutputStream;
import java.io.DataOutput;
import java.io.File;
@ -51,7 +54,13 @@
public class RawLocalFileSystem extends FileSystem {
static final URI NAME = URI.create("file:///");
private Path workingDir;
private static final boolean useDeprecatedFileStatus = !Stat.isAvailable();
// Temporary workaround for HADOOP-9652.
private static boolean useDeprecatedFileStatus = true;
@VisibleForTesting
public static void useStatIfAvailable() {
useDeprecatedFileStatus = !Stat.isAvailable();
}
public RawLocalFileSystem() {
workingDir = getInitialWorkingDirectory();

5
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestSymlinkLocalFS.java
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@ -38,6 +38,11 @@
* Test symbolic links using LocalFs.
*/
abstract public class TestSymlinkLocalFS extends SymlinkBaseTest {
// Workaround for HADOOP-9652
static {
RawLocalFileSystem.useStatIfAvailable();
}
@Override
protected String getScheme() {