HDFS-5513. CacheAdmin commands fail when using . as the path. Contributed by Andrew Wang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1543670 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -379,7 +379,9 @@ Trunk (Unreleased)
     nextEntryId (cmccabe)
 
     HDFS-5512. CacheAdmin -listPools fails with NPE when user lacks permissions
-    to view all pools (awang via cmccabe)
+    to view all pools (wang via cmccabe)
+
+    HDFS-5513. CacheAdmin commands fail when using . as the path. (wang)
 
 Release 2.3.0 - UNRELEASED
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/PathBasedCacheDirective.java

@@ -17,8 +17,6 @@
  */
 package org.apache.hadoop.hdfs.protocol;
 
-import java.net.URI;
-
 import org.apache.commons.lang.builder.EqualsBuilder;
 import org.apache.commons.lang.builder.HashCodeBuilder;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -61,9 +59,7 @@ public class PathBasedCacheDirective {
      */
     public Builder(PathBasedCacheDirective directive) {
       this.id = directive.getId();
-      // deep-copy URI
-      URI uri = directive.getPath().toUri();
-      this.path = new Path(uri.getScheme(), uri.getAuthority(), uri.getPath());
+      this.path = directive.getPath();
       this.replication = directive.getReplication();
       this.pool = directive.getPool();
     }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestPathBasedCacheRequests.java

@@ -31,9 +31,8 @@ import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.io.IOException;
-import java.nio.MappedByteBuffer;
-import java.security.PrivilegedExceptionAction;
 import java.nio.ByteBuffer;
+import java.security.PrivilegedExceptionAction;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.LinkedList;
@@ -59,7 +58,6 @@ import org.apache.hadoop.hdfs.protocol.CachePoolInfo;
 import org.apache.hadoop.hdfs.protocol.PathBasedCacheDirective;
 import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor.CachedBlocksList.Type;
 import org.apache.hadoop.hdfs.server.namenode.EditLogFileOutputStream;
-import org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.MappableBlock;
 import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
 import org.apache.hadoop.io.nativeio.NativeIO;
 import org.apache.hadoop.io.nativeio.NativeIO.POSIX.CacheManipulator;
@@ -482,6 +480,15 @@ public class TestPathBasedCacheRequests {
     dfs.removePathBasedCacheDirective(relativeId);
     iter = dfs.listPathBasedCacheDirectives(null);
     assertFalse(iter.hasNext());
+
+    // Verify that PBCDs with path "." work correctly
+    PathBasedCacheDirective directive =
+        new PathBasedCacheDirective.Builder().setPath(new Path("."))
+            .setPool("pool1").build();
+    long id = dfs.addPathBasedCacheDirective(directive);
+    dfs.modifyPathBasedCacheDirective(new PathBasedCacheDirective.Builder(
+        directive).setId(id).setReplication((short)2).build());
+    dfs.removePathBasedCacheDirective(id);
   }
 
   @Test(timeout=60000)