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HADOOP-7327. FileSystem.listStatus() throws NullPointerException instead of IOException upon access permission failure. Contributed by Matt Foley. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1143491 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Matthew Foley 2011-07-06 16:37:19 +00:00
parent 99f0b7d8cd
commit ff0511019c
3 changed files with 35 additions and 4 deletions
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3
common/CHANGES.txt
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@ -246,6 +246,9 @@ Trunk (unreleased changes)
BUG FIXES
HADOOP-7327. FileSystem.listStatus() throws NullPointerException instead of
IOException upon access permission failure. (mattf)
HADOOP-7015. RawLocalFileSystem#listStatus does not deal with a directory
whose entries are changing (e.g. in a multi-thread or multi-process
environment). (Sanjay Radia via eli)

3
common/src/java/org/apache/hadoop/fs/FileSystem.java
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@ -1151,6 +1151,9 @@ public abstract class FileSystem extends Configured implements Closeable {
private void listStatus(ArrayList<FileStatus> results, Path f,
PathFilter filter) throws FileNotFoundException, IOException {
FileStatus listing[] = listStatus(f);
if (listing == null) {
throw new IOException("Error accessing " + f);
}
for (int i = 0; i < listing.length; i++) {
if (filter.accept(listing[i].getPath())) {

31
common/src/test/core/org/apache/hadoop/fs/FSMainOperationsBaseTest.java
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@ -25,6 +25,7 @@ import java.io.InputStream;
import org.apache.hadoop.fs.Options.Rename;
import org.apache.hadoop.fs.permission.FsPermission;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
@ -252,6 +253,7 @@ public abstract class FSMainOperationsBaseTest {
}
}
@Test
public void testListStatusThrowsExceptionForNonExistentFile()
throws Exception {
try {
@ -262,6 +264,27 @@ public abstract class FSMainOperationsBaseTest {
}
}
// TODO: update after fixing HADOOP-7352
@Test
public void testListStatusThrowsExceptionForUnreadableDir()
throws Exception {
Path testRootDir = getTestRootPath(fSys, "test/hadoop/dir");
Path obscuredDir = new Path(testRootDir, "foo");
Path subDir = new Path(obscuredDir, "bar"); //so foo is non-empty
fSys.mkdirs(subDir);
fSys.setPermission(obscuredDir, new FsPermission((short)0)); //no access
try {
fSys.listStatus(obscuredDir);
Assert.fail("Should throw IOException");
} catch (IOException ioe) {
// expected
} finally {
// make sure the test directory can be deleted
fSys.setPermission(obscuredDir, new FsPermission((short)0755)); //default
}
}
@Test
public void testListStatus() throws Exception {
Path[] testDirs = {
@ -315,6 +338,7 @@ public abstract class FSMainOperationsBaseTest {
}
@Test
public void testListStatusFilterWithSomeMatches() throws Exception {
Path[] testDirs = {
getTestRootPath(fSys, TEST_DIR_AAA),
@ -919,12 +943,13 @@ public abstract class FSMainOperationsBaseTest {
@Test
public void testRenameDirectoryAsNonExistentDirectory() throws Exception {
testRenameDirectoryAsNonExistentDirectory(Rename.NONE);
doTestRenameDirectoryAsNonExistentDirectory(Rename.NONE);
tearDown();
testRenameDirectoryAsNonExistentDirectory(Rename.OVERWRITE);
doTestRenameDirectoryAsNonExistentDirectory(Rename.OVERWRITE);
}
private void testRenameDirectoryAsNonExistentDirectory(Rename... options) throws Exception {
private void doTestRenameDirectoryAsNonExistentDirectory(Rename... options)
throws Exception {
if (!renameSupported()) return;
Path src = getTestRootPath(fSys, "test/hadoop/dir");