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HADOOP-6963. In FileUtil.getDU(..), neither include the size of directories nor follow symbolic links. Contributed by Ravi Prakash 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1309994 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tsz-wo Sze 2012-04-05 18:28:34 +00:00
parent 4c908d0987
commit bf5b508074
4 changed files with 34 additions and 2 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -324,6 +324,9 @@ Release 2.0.0 - UNRELEASED
HADOOP-8243. Security support broken in CLI (manual) failover controller
(todd)
HADOOP-6963. In FileUtil.getDU(..), neither include the size of directories
nor follow symbolic links. (Ravi Prakash via szetszwo)
BREAKDOWN OF HADOOP-7454 SUBTASKS
HADOOP-7455. HA: Introduce HA Service Protocol Interface. (suresh)

5
hadoop-common-project/hadoop-common/pom.xml
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@ -78,6 +78,11 @@
<artifactId>commons-net</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>

11
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileUtil.java
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@ -483,11 +483,18 @@ public class FileUtil {
if (!dir.isDirectory()) {
return dir.length();
} else {
size = dir.length();
File[] allFiles = dir.listFiles();
if(allFiles != null) {
for (int i = 0; i < allFiles.length; i++) {
size = size + getDU(allFiles[i]);
boolean isSymLink;
try {
isSymLink = org.apache.commons.io.FileUtils.isSymlink(allFiles[i]);
} catch(IOException ioe) {
isSymLink = true;
}
if(!isSymLink) {
size += getDU(allFiles[i]);
}
}
}
return size;

17
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileUtil.java
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@ -93,6 +93,9 @@ public class TestFileUtil {
// create files in partitioned directories
createFile(partitioned, "part-r-00000", "foo");
createFile(partitioned, "part-r-00001", "bar");
// create a cycle using symlinks. Cycles should be handled
FileUtil.symLink(del.toString(), dir1.toString() + "/cycle");
}
/**
@ -458,4 +461,18 @@ public class TestFileUtil {
return result;
}
/**
* Test that getDU is able to handle cycles caused due to symbolic links
* and that directory sizes are not added to the final calculated size
* @throws IOException
*/
@Test
public void testGetDU() throws IOException {
setupDirs();
long du = FileUtil.getDU(TEST_DIR);
//Only two files (in partitioned) have 4 bytes each
Assert.assertEquals(du, 8);
}
}