HDFS-5404 Resolve regressions in Windows compatibility on HDFS-4949 branch. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4949@1535217 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/nativeio/NativeIO.c

@@ -383,6 +383,7 @@ Java_org_apache_hadoop_io_nativeio_NativeIO_00024POSIX_mlock_1native(
   JNIEnv *env, jclass clazz,
   jobject buffer, jlong len)
 {
+#ifdef UNIX
   void* buf = (void*)(*env)->GetDirectBufferAddress(env, buffer);
   PASS_EXCEPTIONS(env);
 
@@ -390,6 +391,12 @@ Java_org_apache_hadoop_io_nativeio_NativeIO_00024POSIX_mlock_1native(
     CHECK_DIRECT_BUFFER_ADDRESS(buf);
     throw_ioe(env, errno);
   }
+#endif
+
+#ifdef WINDOWS
+  THROW(env, "java/io/IOException",
+    "The function POSIX.mlock_native() is not supported on Windows");
+#endif
 }
 
 /**
@@ -404,6 +411,7 @@ Java_org_apache_hadoop_io_nativeio_NativeIO_00024POSIX_munlock_1native(
   JNIEnv *env, jclass clazz,
   jobject buffer, jlong len)
 {
+#ifdef UNIX
   void* buf = (void*)(*env)->GetDirectBufferAddress(env, buffer);
   PASS_EXCEPTIONS(env);
 
@@ -411,6 +419,12 @@ Java_org_apache_hadoop_io_nativeio_NativeIO_00024POSIX_munlock_1native(
     CHECK_DIRECT_BUFFER_ADDRESS(buf);
     throw_ioe(env, errno);
   }
+#endif
+
+#ifdef WINDOWS
+  THROW(env, "java/io/IOException",
+    "The function POSIX.munlock_native() is not supported on Windows");
+#endif
 }
 
 #ifdef __FreeBSD__

hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-4949.txt

@@ -115,3 +115,6 @@ HDFS-4949 (Unreleased)
     HDFS-5385. Caching RPCs are AtMostOnce, but do not persist client ID and
     call ID to edit log.  (Chris Nauroth via Colin Patrick McCabe)
 
+    HDFS-5404. Resolve regressions in Windows compatibility on HDFS-4949
+    branch. (Chris Nauroth via Andrew Wang)
+

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestFsDatasetCache.java

@@ -18,6 +18,7 @@
 package org.apache.hadoop.hdfs.server.datanode;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assume.assumeTrue;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyLong;
 import static org.mockito.Matchers.anyInt;
@@ -50,6 +51,7 @@ import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
 import org.apache.hadoop.hdfs.server.protocol.HeartbeatResponse;
 import org.apache.hadoop.hdfs.server.protocol.NNHAStatusHeartbeat;
 import org.apache.hadoop.hdfs.server.protocol.StorageReport;
+import org.apache.hadoop.io.nativeio.NativeIO;
 import org.apache.log4j.Logger;
 import org.junit.After;
 import org.junit.Before;
@@ -72,6 +74,8 @@ public class TestFsDatasetCache {
 
   @Before
   public void setUp() throws Exception {
+    assumeTrue(!Path.WINDOWS);
+    assumeTrue(NativeIO.isAvailable());
     conf = new HdfsConfiguration();
     conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCK_SIZE);
     conf.setLong(DFSConfigKeys.DFS_DATANODE_MAX_LOCKED_MEMORY_KEY,

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

@@ -447,11 +447,11 @@ public class TestPathBasedCacheRequests {
 
   @Test(timeout=60000)
   public void testCacheManagerRestart() throws Exception {
+    cluster.shutdown();
+    cluster = null;
     HdfsConfiguration conf = createCachingConf();
-    MiniDFSCluster cluster =
+    cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
-      new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
 
-    try {
     cluster.waitActive();
     DistributedFileSystem dfs = cluster.getFileSystem();
 
@@ -515,9 +515,6 @@ public class TestPathBasedCacheRequests {
       assertEquals(pool, cd.getPool());
     }
     assertFalse("Unexpected # of cache descriptors found", dit.hasNext());
-    } finally {
-      cluster.shutdown();
-    }
   }
 
   private static void waitForCachedBlocks(NameNode nn,