HADOOP-11179. Java untar should handle the case that the file entry comes without its parent directory entry. Contributed by Craig Welch.

(cherry picked from commit a1690519317068d9855174752d22ff45f0e4c962)

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -611,6 +611,9 @@ Release 2.6.0 - UNRELEASED
     HADOOP-11163. MetricsSystemImpl may miss a registered source.
     (Chuan Liu via cnauroth)
 
+    HADOOP-11179. Java untar should handle the case that the file entry comes
+    without its parent directory entry. (Craig Welch via zjshen)
+
 Release 2.5.1 - 2014-09-05
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileUtil.java

@@ -707,7 +707,7 @@ public class FileUtil {
       TarArchiveEntry entry, File outputDir) throws IOException {
     if (entry.isDirectory()) {
       File subDir = new File(outputDir, entry.getName());
-      if (!subDir.mkdir() && !subDir.isDirectory()) {
+      if (!subDir.mkdirs() && !subDir.isDirectory()) {
         throw new IOException("Mkdirs failed to create tar internal dir "
             + outputDir);
       }
@@ -720,8 +720,8 @@ public class FileUtil {
     }
 
     File outputFile = new File(outputDir, entry.getName());
-    if (!outputDir.exists()) {
-      if (!outputDir.mkdirs()) {
+    if (!outputFile.getParentFile().exists()) {
+      if (!outputFile.getParentFile().mkdirs()) {
         throw new IOException("Mkdirs failed to create tar internal dir "
             + outputDir);
       }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileUtil.java

@@ -619,7 +619,7 @@ public class TestFileUtil {
     OutputStream os = new FileOutputStream(simpleTar); 
     TarOutputStream tos = new TarOutputStream(os);
     try {
-      TarEntry te = new TarEntry("foo");
+      TarEntry te = new TarEntry("/bar/foo");
       byte[] data = "some-content".getBytes("UTF-8");
       te.setSize(data.length);
       tos.putNextEntry(te);
@@ -634,8 +634,8 @@ public class TestFileUtil {
     // successfully untar it into an existing dir:
     FileUtil.unTar(simpleTar, tmp);
     // check result:
-    assertTrue(new File(tmp, "foo").exists());
-    assertEquals(12, new File(tmp, "foo").length());
+    assertTrue(new File(tmp, "/bar/foo").exists());
+    assertEquals(12, new File(tmp, "/bar/foo").length());
     
     final File regularFile = new File(tmp, "QuickBrownFoxJumpsOverTheLazyDog");
     regularFile.createNewFile();