HADOOP-8013 ViewFileSystem does not honor setVerifyChecksum (Dayrn Sharp via bobby)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1240383 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -83,17 +83,20 @@ Trunk (unreleased changes)
     kerberos. (jitendra)
 
   BUG FIXES
+    HADOOP-8013. ViewFileSystem does not honor setVerifyChecksum
+    (Daryn Sharp via bobby)
+
     HADOOP-8018.  Hudson auto test for HDFS has started throwing javadoc
     (Jon Eagles via bobby)
 
     HADOOP-8001  ChecksumFileSystem's rename doesn't correctly handle checksum
-                 files. (Daryn Sharp via bobby)
+    files. (Daryn Sharp via bobby)
 
     HADOOP-8006  TestFSInputChecker is failing in trunk.
-                 (Daryn Sharp via bobby)
+    (Daryn Sharp via bobby)
 
     HADOOP-7998. CheckFileSystem does not correctly honor setVerifyChecksum
-                 (Daryn Sharp via bobby)
+    (Daryn Sharp via bobby)
 
     HADOOP-7851. Configuration.getClasses() never returns the default value. 
                  (Uma Maheswara Rao G via amarrk)

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

@@ -20,6 +20,7 @@ package org.apache.hadoop.fs;
 
 import java.io.*;
 import java.net.URI;
+import java.net.URISyntaxException;
 import java.util.EnumSet;
 import java.util.List;
 
@@ -51,6 +52,7 @@ import org.apache.hadoop.util.Progressable;
 public class FilterFileSystem extends FileSystem {
   
   protected FileSystem fs;
+  private String swapScheme;
   
   /*
    * so that extending classes can define it
@@ -77,7 +79,11 @@ public class FilterFileSystem extends FileSystem {
    * @param conf the configuration
    */
   public void initialize(URI name, Configuration conf) throws IOException {
-    fs.initialize(name, conf);
+    super.initialize(name, conf);
+    String scheme = name.getScheme();
+    if (!scheme.equals(fs.getUri().getScheme())) {
+      swapScheme = scheme;
+    }
   }
 
   /** Returns a URI whose scheme and authority identify this FileSystem.*/
@@ -96,7 +102,19 @@ public class FilterFileSystem extends FileSystem {
   
   /** Make sure that a path specifies a FileSystem. */
   public Path makeQualified(Path path) {
-    return fs.makeQualified(path);
+    Path fqPath = fs.makeQualified(path);
+    // swap in our scheme if the filtered fs is using a different scheme
+    if (swapScheme != null) {
+      try {
+        // NOTE: should deal with authority, but too much other stuff is broken 
+        fqPath = new Path(
+            new URI(swapScheme, fqPath.toUri().getSchemeSpecificPart(), null)
+        );
+      } catch (URISyntaxException e) {
+        throw new IllegalArgumentException(e);
+      }
+    }
+    return fqPath;
   }
   
   ///////////////////////////////////////////////////////////////

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

@@ -24,6 +24,7 @@ import java.util.*;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.conf.Configuration;
 
 /****************************************************************
  * Implement the FileSystem API for the checksumed local filesystem.
@@ -34,21 +35,26 @@ import org.apache.hadoop.classification.InterfaceStability;
 public class LocalFileSystem extends ChecksumFileSystem {
   static final URI NAME = URI.create("file:///");
   static private Random rand = new Random();
-  FileSystem rfs;
   
   public LocalFileSystem() {
     this(new RawLocalFileSystem());
   }
   
   public FileSystem getRaw() {
-    return rfs;
+    return getRawFileSystem();
   }
     
   public LocalFileSystem(FileSystem rawLocalFileSystem) {
     super(rawLocalFileSystem);
-    rfs = rawLocalFileSystem;
   }
     
+  @Override
+  public void initialize(URI uri, Configuration conf) throws IOException {
+    super.initialize(uri, conf);
+    // ctor didn't initialize the filtered fs
+    getRawFileSystem().initialize(uri, conf);
+  }
+  
   /** Convert a path to a File. */
   public File pathToFile(Path path) {
     return ((RawLocalFileSystem)fs).pathToFile(path);

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

@@ -19,8 +19,6 @@ package org.apache.hadoop.fs.viewfs;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.net.URI;
-import java.net.URISyntaxException;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
@@ -82,37 +80,16 @@ class ChRootedFileSystem extends FilterFileSystem {
   
   /**
    * Constructor
-   * @param fs base file system
-   * @param theRoot chRoot for this file system
-   * @throws URISyntaxException
+   * @param uri base file system
+   * @param conf configuration
+   * @throws IOException 
    */
-  public ChRootedFileSystem(final FileSystem fs, final Path theRoot)
-    throws URISyntaxException {
-    super(fs);
-    makeQualified(theRoot); //check that root is a valid path for fs
-                            // Would like to call myFs.checkPath(theRoot); 
-                            // but not public
-    chRootPathPart = new Path(theRoot.toUri().getPath());
+  public ChRootedFileSystem(final URI uri, Configuration conf)
+      throws IOException {
+    super(FileSystem.get(uri, conf));
+    chRootPathPart = new Path(uri.getPath());
     chRootPathPartString = chRootPathPart.toUri().getPath();
-    try {
-      initialize(fs.getUri(), fs.getConf());
-    } catch (IOException e) { // This exception should not be thrown
-      throw new RuntimeException("This should not occur");
-    }
-    
-    /*
-     * We are making URI include the chrootedPath: e.g. file:///chrootedPath.
-     * This is questionable since Path#makeQualified(uri, path) ignores
-     * the pathPart of a uri. Since this class is internal we can ignore
-     * this issue but if we were to make it external then this needs
-     * to be resolved.
-     */
-    // Handle the two cases:
-    //              scheme:/// and scheme://authority/
-    myUri = new URI(fs.getUri().toString() + 
-        (fs.getUri().getAuthority() == null ? "" :  Path.SEPARATOR) +
-          chRootPathPart.toString().substring(1));
-
+    myUri = uri;
     workingDir = getHomeDirectory();
     // We don't use the wd of the myFs
   }

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

@@ -168,8 +168,7 @@ public class ViewFileSystem extends FileSystem {
         protected
         FileSystem getTargetFileSystem(final URI uri)
           throws URISyntaxException, IOException {
-            return new ChRootedFileSystem(FileSystem.get(uri, config), 
-                new Path(uri.getPath()));
+            return new ChRootedFileSystem(uri, config);
         }
 
         @Override
@@ -464,8 +463,11 @@ public class ViewFileSystem extends FileSystem {
 
   @Override
   public void setVerifyChecksum(final boolean verifyChecksum) { 
-    // This is a file system level operations, however ViewFileSystem 
-    // points to many file systems. Noop for ViewFileSystem.
+    List<InodeTree.MountPoint<FileSystem>> mountPoints = 
+        fsState.getMountPoints();
+    for (InodeTree.MountPoint<FileSystem> mount : mountPoints) {
+      mount.target.targetFileSystem.setVerifyChecksum(verifyChecksum);
+    }
   }
   
   public MountPoint[] getMountPoints() {

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

@@ -72,14 +72,15 @@ public final class FileSystemTestHelper {
 
   public static String getAbsoluteTestRootDir(FileSystem fSys)
       throws IOException {
-    if (absTestRootDir == null) {
+    // NOTE: can't cache because of different filesystems!
+    //if (absTestRootDir == null) 
       if (TEST_ROOT_DIR.startsWith("/")) {
         absTestRootDir = TEST_ROOT_DIR;
       } else {
         absTestRootDir = fSys.getWorkingDirectory().toString() + "/"
             + TEST_ROOT_DIR;
       }
-    }
+    //}
     return absTestRootDir;
   }
   

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

@@ -51,7 +51,7 @@ public class TestChRootedFileSystem {
 
 
     // ChRoot to the root of the testDirectory
-    fSys = new ChRootedFileSystem(fSysTarget, chrootedTo);
+    fSys = new ChRootedFileSystem(chrootedTo.toUri(), conf);
   }
 
   @After