Revert "HBASE-12558 TestHCM.testClusterStatus Unexpected exception, expected<org.apache.hadoop.hbase.regionserver.RegionServerStoppedException> but was<junit.framework.AssertionFailedError> -- ADDED DEBUG"

Accidental commit. Reverting.

This reverts commit 2458be08ed.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionManager.java

@@ -67,7 +67,6 @@ import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitorBase;
 import org.apache.hadoop.hbase.client.coprocessor.Batch;
 import org.apache.hadoop.hbase.exceptions.RegionMovedException;
 import org.apache.hadoop.hbase.exceptions.RegionOpeningException;
-import org.apache.hadoop.hbase.ipc.RpcClientFactory;
 import org.apache.hadoop.hbase.ipc.RpcClient;
 import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
@@ -620,7 +619,7 @@ class ConnectionManager {
       this.registry = setupRegistry();
       retrieveClusterId();
 
-      this.rpcClient = RpcClientFactory.createClient(this.conf, this.clusterId);
+      this.rpcClient = new RpcClient(this.conf, this.clusterId);
       this.rpcControllerFactory = RpcControllerFactory.instantiate(conf);
 
       // Do we publish the status?
@@ -640,7 +639,7 @@ class ConnectionManager {
                 @Override
                 public void newDead(ServerName sn) {
                   clearCaches(sn);
-                  rpcClient.cancelConnections(sn);
+                  rpcClient.cancelConnections(sn.getHostname(), sn.getPort());
                 }
               }, conf, listenerClass);
         }
@@ -784,6 +783,18 @@ class ConnectionManager {
       return RegistryFactory.getRegistry(this);
     }
 
+    /**
+     * For tests only.
+     * @param rpcClient Client we should use instead.
+     * @return Previous rpcClient
+     */
+    @VisibleForTesting
+    RpcClient setRpcClient(final RpcClient rpcClient) {
+      RpcClient oldRpcClient = this.rpcClient;
+      this.rpcClient = rpcClient;
+      return oldRpcClient;
+    }
+
     /**
      * For tests only.
      */
@@ -2325,7 +2336,7 @@ class ConnectionManager {
         clusterStatusListener.close();
       }
       if (rpcClient != null) {
-        rpcClient.close();
+        rpcClient.stop();
       }
     }
 

hbase-client/src/main/java/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.java

@@ -39,7 +39,7 @@ import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.classification.InterfaceAudience;
 import org.apache.hadoop.hbase.exceptions.ConnectionClosingException;
 import org.apache.hadoop.hbase.exceptions.PreemptiveFastFailException;
-import org.apache.hadoop.hbase.ipc.FailedServerException;
+import org.apache.hadoop.hbase.ipc.RpcClient.FailedServerException;
 import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
 import org.apache.hadoop.ipc.RemoteException;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/IPCUtil.java

@@ -51,7 +51,7 @@ import com.google.protobuf.Message;
  * Utility to help ipc'ing.
  */
 @InterfaceAudience.Private
-public class IPCUtil {
+class IPCUtil {
   public static final Log LOG = LogFactory.getLog(IPCUtil.class);
   /**
    * How much we think the decompressor will expand the original compressed content.
@@ -60,7 +60,7 @@ public class IPCUtil {
   private final int cellBlockBuildingInitialBufferSize;
   private final Configuration conf;
 
-  public IPCUtil(final Configuration conf) {
+  IPCUtil(final Configuration conf) {
     super();
     this.conf = conf;
     this.cellBlockDecompressionMultiplier =
@@ -81,14 +81,14 @@ public class IPCUtil {
    * <code>compressor</code>.
    * @param codec
    * @param compressor
-   * @param cellScanner
+   * @Param cellScanner
    * @return Null or byte buffer filled with a cellblock filled with passed-in Cells encoded using
    * passed in <code>codec</code> and/or <code>compressor</code>; the returned buffer has been
    * flipped and is ready for reading.  Use limit to find total size.
    * @throws IOException
    */
   @SuppressWarnings("resource")
-  public ByteBuffer buildCellBlock(final Codec codec, final CompressionCodec compressor,
+  ByteBuffer buildCellBlock(final Codec codec, final CompressionCodec compressor,
     final CellScanner cellScanner)
   throws IOException {
     if (cellScanner == null) return null;
@@ -145,7 +145,7 @@ public class IPCUtil {
    * @return CellScanner to work against the content of <code>cellBlock</code>
    * @throws IOException
    */
-  public CellScanner createCellScanner(final Codec codec, final CompressionCodec compressor,
+  CellScanner createCellScanner(final Codec codec, final CompressionCodec compressor,
       final byte [] cellBlock)
   throws IOException {
     return createCellScanner(codec, compressor, cellBlock, 0, cellBlock.length);
@@ -159,7 +159,7 @@ public class IPCUtil {
    * @return CellScanner to work against the content of <code>cellBlock</code>
    * @throws IOException
    */
-  public CellScanner createCellScanner(final Codec codec, final CompressionCodec compressor,
+  CellScanner createCellScanner(final Codec codec, final CompressionCodec compressor,
       final byte [] cellBlock, final int offset, final int length)
   throws IOException {
     // If compressed, decompress it first before passing it on else we will leak compression
@@ -200,7 +200,7 @@ public class IPCUtil {
    * @return The passed in Message serialized with delimiter.  Return null if <code>m</code> is null
    * @throws IOException
    */
-  public static ByteBuffer getDelimitedMessageAsByteBuffer(final Message m) throws IOException {
+  static ByteBuffer getDelimitedMessageAsByteBuffer(final Message m) throws IOException {
     if (m == null) return null;
     int serializedSize = m.getSerializedSize();
     int vintSize = CodedOutputStream.computeRawVarint32Size(serializedSize);
@@ -223,7 +223,7 @@ public class IPCUtil {
    * @return Total number of bytes written.
    * @throws IOException
    */
-  public static int write(final OutputStream dos, final Message header, final Message param,
+  static int write(final OutputStream dos, final Message header, final Message param,
       final ByteBuffer cellBlock)
   throws IOException {
     // Must calculate total size and write that first so other side can read it all in in one
@@ -255,7 +255,7 @@ public class IPCUtil {
    * @param len
    * @throws IOException
    */
-  public static void readChunked(final DataInput in, byte[] dest, int offset, int len)
+  static void readChunked(final DataInput in, byte[] dest, int offset, int len)
       throws IOException {
     int maxRead = 8192;
 
@@ -265,9 +265,11 @@ public class IPCUtil {
   }
 
   /**
+   * @param header
+   * @param body
    * @return Size on the wire when the two messages are written with writeDelimitedTo
    */
-  public static int getTotalSizeWhenWrittenDelimited(Message ... messages) {
+  static int getTotalSizeWhenWrittenDelimited(Message ... messages) {
     int totalSize = 0;
     for (Message m: messages) {
       if (m == null) continue;

hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/MetaTableLocator.java

@@ -39,7 +39,7 @@ import org.apache.hadoop.hbase.classification.InterfaceAudience;
 import org.apache.hadoop.hbase.client.HConnection;
 import org.apache.hadoop.hbase.client.RetriesExhaustedException;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
-import org.apache.hadoop.hbase.ipc.FailedServerException;
+import org.apache.hadoop.hbase.ipc.RpcClient;
 import org.apache.hadoop.hbase.ipc.ServerNotRunningYetException;
 import org.apache.hadoop.hbase.master.RegionState;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
@@ -316,7 +316,7 @@ public class MetaTableLocator {
       LOG.debug("Exception connecting to " + sn);
     } catch (UnknownHostException e) {
       LOG.debug("Unknown host exception connecting to  " + sn);
-    } catch (FailedServerException e) {
+    } catch (RpcClient.FailedServerException e) {
       if (LOG.isDebugEnabled()) {
         LOG.debug("Server " + sn + " is in failed server list.");
       }

hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServer.java

@@ -148,7 +148,7 @@ import com.google.protobuf.TextFormat;
  * CallRunner#run executes the call.  When done, asks the included Call to put itself on new
  * queue for Responder to pull from and return result to client.
  *
- * @see RpcClientImpl
+ * @see RpcClient
  */
 @InterfaceAudience.LimitedPrivate({HBaseInterfaceAudience.COPROC, HBaseInterfaceAudience.PHOENIX})
 @InterfaceStability.Evolving

hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java

@@ -64,8 +64,8 @@ import org.apache.hadoop.hbase.client.TableState;
 import org.apache.hadoop.hbase.executor.EventHandler;
 import org.apache.hadoop.hbase.executor.EventType;
 import org.apache.hadoop.hbase.executor.ExecutorService;
-import org.apache.hadoop.hbase.ipc.FailedServerException;
 import org.apache.hadoop.hbase.ipc.RpcClient;
+import org.apache.hadoop.hbase.ipc.RpcClient.FailedServerException;
 import org.apache.hadoop.hbase.ipc.ServerNotRunningYetException;
 import org.apache.hadoop.hbase.master.RegionState.State;
 import org.apache.hadoop.hbase.master.balancer.FavoredNodeAssignmentHelper;

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java

@@ -78,6 +78,7 @@ import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.client.ConnectionUtils;
 import org.apache.hadoop.hbase.conf.ConfigurationManager;
 import org.apache.hadoop.hbase.client.ClusterConnection;
+import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.coordination.BaseCoordinatedStateManager;
 import org.apache.hadoop.hbase.coordination.SplitLogWorkerCoordination;
 import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
@@ -90,7 +91,6 @@ import org.apache.hadoop.hbase.fs.HFileSystem;
 import org.apache.hadoop.hbase.http.InfoServer;
 import org.apache.hadoop.hbase.io.hfile.CacheConfig;
 import org.apache.hadoop.hbase.ipc.RpcClient;
-import org.apache.hadoop.hbase.ipc.RpcClientFactory;
 import org.apache.hadoop.hbase.ipc.RpcServerInterface;
 import org.apache.hadoop.hbase.ipc.ServerNotRunningYetException;
 import org.apache.hadoop.hbase.ipc.ServerRpcController;
@@ -782,11 +782,10 @@ public class HRegionServer extends HasThread implements
     rsQuotaManager = new RegionServerQuotaManager(this);
 
     // Setup RPC client for master communication
-    rpcClient = RpcClientFactory.createClient(conf, clusterId, new InetSocketAddress(
+    rpcClient = new RpcClient(conf, clusterId, new InetSocketAddress(
       rpcServices.isa.getAddress(), 0));
 
-    int storefileRefreshPeriod = conf.getInt(
-        StorefileRefresherChore.REGIONSERVER_STOREFILE_REFRESH_PERIOD
+    int storefileRefreshPeriod = conf.getInt(StorefileRefresherChore.REGIONSERVER_STOREFILE_REFRESH_PERIOD
       , StorefileRefresherChore.DEFAULT_REGIONSERVER_STOREFILE_REFRESH_PERIOD);
     if (storefileRefreshPeriod > 0) {
       this.storefileRefresher = new StorefileRefresherChore(storefileRefreshPeriod, this, this);
@@ -995,7 +994,7 @@ public class HRegionServer extends HasThread implements
       this.rssStub = null;
     }
     if (this.rpcClient != null) {
-      this.rpcClient.close();
+      this.rpcClient.stop();
     }
     if (this.leases != null) {
       this.leases.close();

hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientScannerRPCTimeout.java

@@ -30,7 +30,7 @@ import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.MiniHBaseCluster.MiniHBaseClusterRegionServer;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.CoordinatedStateManager;
-import org.apache.hadoop.hbase.ipc.AbstractRpcClient;
+import org.apache.hadoop.hbase.ipc.RpcClient;
 import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanRequest;
 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanResponse;
@@ -65,7 +65,7 @@ public class TestClientScannerRPCTimeout {
   @BeforeClass
   public static void setUpBeforeClass() throws Exception {
     ((Log4JLogger)RpcServer.LOG).getLogger().setLevel(Level.ALL);
-    ((Log4JLogger)AbstractRpcClient.LOG).getLogger().setLevel(Level.ALL);
+    ((Log4JLogger)RpcClient.LOG).getLogger().setLevel(Level.ALL);
     ((Log4JLogger)ScannerCallable.LOG).getLogger().setLevel(Level.ALL);
     Configuration conf = TEST_UTIL.getConfiguration();
     // Don't report so often so easier to see other rpcs

hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientTimeouts.java

@@ -22,7 +22,6 @@ package org.apache.hadoop.hbase.client;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import java.net.SocketAddress;
 import java.net.SocketTimeoutException;
 import java.util.Random;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -36,8 +35,6 @@ import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.MasterNotRunningException;
 import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.ipc.RpcClient;
-import org.apache.hadoop.hbase.ipc.RpcClientFactory;
-import org.apache.hadoop.hbase.ipc.RpcClientImpl;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.testclassification.ClientTests;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
@@ -64,10 +61,6 @@ public class TestClientTimeouts {
   @BeforeClass
   public static void setUpBeforeClass() throws Exception {
     TEST_UTIL.startMiniCluster(SLAVES);
-    // Set the custom RPC client with random timeouts as the client
-    TEST_UTIL.getConfiguration().set(
-        RpcClientFactory.CUSTOM_RPC_CLIENT_IMPL_CONF_KEY,
-        RandomTimeoutRpcClient.class.getName());
   }
 
   /**
@@ -88,9 +81,7 @@ public class TestClientTimeouts {
     Connection lastConnection = null;
     boolean lastFailed = false;
     int initialInvocations = RandomTimeoutBlockingRpcChannel.invokations.get();
-    RandomTimeoutRpcClient rpcClient = (RandomTimeoutRpcClient) RpcClientFactory
-        .createClient(TEST_UTIL.getConfiguration(), TEST_UTIL.getClusterKey());
-
+    RpcClient rpcClient = newRandomTimeoutRpcClient();
     try {
       for (int i = 0; i < 5 || (lastFailed && i < 100); ++i) {
         lastFailed = false;
@@ -103,6 +94,13 @@ public class TestClientTimeouts {
           Connection connection = admin.getConnection();
           assertFalse(connection == lastConnection);
           lastConnection = connection;
+          // Override the connection's rpc client for timeout testing
+          RpcClient oldRpcClient =
+            ((ConnectionManager.HConnectionImplementation)connection).setRpcClient(
+              rpcClient);
+          if (oldRpcClient != null) {
+            oldRpcClient.stop();
+          }
           // run some admin commands
           HBaseAdmin.checkHBaseAvailable(conf);
           admin.setBalancerRunning(false, false);
@@ -113,8 +111,7 @@ public class TestClientTimeouts {
         } finally {
           admin.close();
           if (admin.getConnection().isClosed()) {
-            rpcClient = (RandomTimeoutRpcClient) RpcClientFactory
-                .createClient(TEST_UTIL.getConfiguration(), TEST_UTIL.getClusterKey());
+            rpcClient = newRandomTimeoutRpcClient();
           }
         }
       }
@@ -122,36 +119,31 @@ public class TestClientTimeouts {
       assertFalse(lastFailed);
       assertTrue(RandomTimeoutBlockingRpcChannel.invokations.get() > initialInvocations);
     } finally {
-      rpcClient.close();
+      rpcClient.stop();
     }
   }
 
-  /**
-   * Rpc Channel implementation with RandomTimeoutBlockingRpcChannel
-   */
-  public static class RandomTimeoutRpcClient extends RpcClientImpl{
-    public RandomTimeoutRpcClient(Configuration conf, String clusterId, SocketAddress localAddr) {
-      super(conf, clusterId, localAddr);
-    }
-
+  private static RpcClient newRandomTimeoutRpcClient() {
+    return new RpcClient(
+        TEST_UTIL.getConfiguration(), TEST_UTIL.getClusterKey()) {
       // Return my own instance, one that does random timeouts
       @Override
       public BlockingRpcChannel createBlockingRpcChannel(ServerName sn,
           User ticket, int rpcTimeout) {
         return new RandomTimeoutBlockingRpcChannel(this, sn, ticket, rpcTimeout);
       }
+    };
   }
 
   /**
    * Blocking rpc channel that goes via hbase rpc.
    */
-  static class RandomTimeoutBlockingRpcChannel
-      extends RpcClientImpl.BlockingRpcChannelImplementation {
+  static class RandomTimeoutBlockingRpcChannel extends RpcClient.BlockingRpcChannelImplementation {
     private static final Random RANDOM = new Random(System.currentTimeMillis());
     public static final double CHANCE_OF_TIMEOUT = 0.3;
     private static AtomicInteger invokations = new AtomicInteger();
 
-    RandomTimeoutBlockingRpcChannel(final RpcClientImpl rpcClient, final ServerName sn,
+    RandomTimeoutBlockingRpcChannel(final RpcClient rpcClient, final ServerName sn,
         final User ticket, final int rpcTimeout) {
       super(rpcClient, sn, ticket, rpcTimeout);
     }

hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSideNoCodec.java

@@ -25,7 +25,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellScanner;
 import org.apache.hadoop.hbase.HBaseTestingUtility;
-import org.apache.hadoop.hbase.ipc.AbstractRpcClient;
+import org.apache.hadoop.hbase.ipc.RpcClient;
 import org.apache.hadoop.hbase.testclassification.ClientTests;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
 import org.apache.hadoop.hbase.util.Bytes;
@@ -97,7 +97,7 @@ public class TestFromClientSideNoCodec {
   public void testNoCodec() {
     Configuration c = new Configuration();
     c.set("hbase.client.default.rpc.codec", "");
-    String codec = AbstractRpcClient.getDefaultCodec(c);
+    String codec = RpcClient.getDefaultCodec(c);
     assertTrue(codec == null || codec.length() == 0);
   }
 }

hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestHCM.java

@@ -394,7 +394,7 @@ public class TestHCM {
 
     LOG.info("Going to cancel connections. connection=" + conn.toString() + ", sn=" + sn);
     for (int i = 0; i < 5000; i++) {
-      rpcClient.cancelConnections(sn);
+      rpcClient.cancelConnections(sn.getHostname(), sn.getPort());
       Thread.sleep(5);
     }
 

hbase-server/src/test/java/org/apache/hadoop/hbase/filter/FilterTestingCluster.java

@@ -41,7 +41,7 @@ import org.apache.hadoop.hbase.client.HBaseAdmin;
 import org.apache.hadoop.hbase.client.HTable;
 import org.apache.hadoop.hbase.client.ScannerCallable;
 import org.apache.hadoop.hbase.client.Table;
-import org.apache.hadoop.hbase.ipc.AbstractRpcClient;
+import org.apache.hadoop.hbase.ipc.RpcClient;
 import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.testclassification.FilterTests;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
@@ -115,7 +115,7 @@ public class FilterTestingCluster {
   @BeforeClass
   public static void setUp() throws Exception {
     ((Log4JLogger)RpcServer.LOG).getLogger().setLevel(Level.ALL);
-    ((Log4JLogger)AbstractRpcClient.LOG).getLogger().setLevel(Level.ALL);
+    ((Log4JLogger)RpcClient.LOG).getLogger().setLevel(Level.ALL);
     ((Log4JLogger)ScannerCallable.LOG).getLogger().setLevel(Level.ALL);
     TEST_UTIL.startMiniCluster(1);
     initialize(TEST_UTIL.getConfiguration());

hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/TestDelayedRpc.java

@@ -89,8 +89,7 @@ public class TestDelayedRpc {
         conf,
         new FifoRpcScheduler(conf, 1));
     rpcServer.start();
-    RpcClient rpcClient = RpcClientFactory.createClient(
-        conf, HConstants.DEFAULT_CLUSTER_ID.toString());
+    RpcClient rpcClient = new RpcClient(conf, HConstants.DEFAULT_CLUSTER_ID.toString());
     try {
       BlockingRpcChannel channel = rpcClient.createBlockingRpcChannel(
           ServerName.valueOf(rpcServer.getListenerAddress().getHostName(),
@@ -119,7 +118,7 @@ public class TestDelayedRpc {
       assertEquals(UNDELAYED, results.get(1).intValue());
       assertEquals(results.get(2).intValue(), delayReturnValue ? DELAYED :  0xDEADBEEF);
     } finally {
-      rpcClient.close();
+      rpcClient.stop();
     }
   }
 
@@ -171,8 +170,7 @@ public class TestDelayedRpc {
         conf,
         new FifoRpcScheduler(conf, 1));
     rpcServer.start();
-    RpcClient rpcClient = RpcClientFactory.createClient(
-        conf, HConstants.DEFAULT_CLUSTER_ID.toString());
+    RpcClient rpcClient = new RpcClient(conf, HConstants.DEFAULT_CLUSTER_ID.toString());
     try {
       BlockingRpcChannel channel = rpcClient.createBlockingRpcChannel(
           ServerName.valueOf(rpcServer.getListenerAddress().getHostName(),
@@ -202,7 +200,7 @@ public class TestDelayedRpc {
 
       log.removeAppender(listAppender);
     } finally {
-      rpcClient.close();
+      rpcClient.stop();
     }
   }
 
@@ -295,8 +293,7 @@ public class TestDelayedRpc {
         conf,
         new FifoRpcScheduler(conf, 1));
     rpcServer.start();
-    RpcClient rpcClient = RpcClientFactory.createClient(
-        conf, HConstants.DEFAULT_CLUSTER_ID.toString());
+    RpcClient rpcClient = new RpcClient(conf, HConstants.DEFAULT_CLUSTER_ID.toString());
     try {
       BlockingRpcChannel channel = rpcClient.createBlockingRpcChannel(
           ServerName.valueOf(rpcServer.getListenerAddress().getHostName(),
@@ -326,7 +323,7 @@ public class TestDelayedRpc {
       }
       assertTrue(caughtException);
     } finally {
-      rpcClient.close();
+      rpcClient.stop();
     }
   }
 

hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/TestHBaseClient.java

@@ -36,7 +36,7 @@ public class TestHBaseClient {
   public void testFailedServer(){
     ManualEnvironmentEdge ee = new ManualEnvironmentEdge();
     EnvironmentEdgeManager.injectEdge(  ee );
-    FailedServers fs = new FailedServers(new Configuration());
+    RpcClient.FailedServers fs = new RpcClient.FailedServers(new Configuration());
 
     InetSocketAddress ia = InetSocketAddress.createUnresolved("bad", 12);
     InetSocketAddress ia2 = InetSocketAddress.createUnresolved("bad", 12);  // same server as ia

hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/TestIPC.java

@@ -178,7 +178,7 @@ public class TestIPC {
   @Test
   public void testNoCodec() throws InterruptedException, IOException {
     Configuration conf = HBaseConfiguration.create();
-    RpcClientImpl client = new RpcClientImpl(conf, HConstants.CLUSTER_ID_DEFAULT) {
+    RpcClient client = new RpcClient(conf, HConstants.CLUSTER_ID_DEFAULT) {
       @Override
       Codec getCodec() {
         return null;
@@ -197,7 +197,7 @@ public class TestIPC {
       // Silly assertion that the message is in the returned pb.
       assertTrue(r.getFirst().toString().contains(message));
     } finally {
-      client.close();
+      client.stop();
       rpcServer.stop();
     }
   }
@@ -216,10 +216,10 @@ public class TestIPC {
   throws IOException, InterruptedException, SecurityException, NoSuchMethodException {
     Configuration conf = new Configuration(HBaseConfiguration.create());
     conf.set("hbase.client.rpc.compressor", GzipCodec.class.getCanonicalName());
-    doSimpleTest(conf, new RpcClientImpl(conf, HConstants.CLUSTER_ID_DEFAULT));
+    doSimpleTest(conf, new RpcClient(conf, HConstants.CLUSTER_ID_DEFAULT));
   }
 
-  private void doSimpleTest(final Configuration conf, final RpcClientImpl client)
+  private void doSimpleTest(final Configuration conf, final RpcClient client)
   throws InterruptedException, IOException {
     TestRpcServer rpcServer = new TestRpcServer();
     List<Cell> cells = new ArrayList<Cell>();
@@ -239,7 +239,7 @@ public class TestIPC {
       }
       assertEquals(count, index);
     } finally {
-      client.close();
+      client.stop();
       rpcServer.stop();
     }
   }
@@ -258,7 +258,7 @@ public class TestIPC {
     }).when(spyFactory).createSocket();
 
     TestRpcServer rpcServer = new TestRpcServer();
-    RpcClientImpl client = new RpcClientImpl(conf, HConstants.CLUSTER_ID_DEFAULT, spyFactory);
+    RpcClient client = new RpcClient(conf, HConstants.CLUSTER_ID_DEFAULT, spyFactory);
     try {
       rpcServer.start();
       InetSocketAddress address = rpcServer.getListenerAddress();
@@ -270,7 +270,7 @@ public class TestIPC {
       LOG.info("Caught expected exception: " + e.toString());
       assertTrue(StringUtils.stringifyException(e).contains("Injected fault"));
     } finally {
-      client.close();
+      client.stop();
       rpcServer.stop();
     }
   }
@@ -281,7 +281,7 @@ public class TestIPC {
     RpcScheduler scheduler = spy(new FifoRpcScheduler(CONF, 1));
     RpcServer rpcServer = new TestRpcServer(scheduler);
     verify(scheduler).init((RpcScheduler.Context) anyObject());
-    RpcClientImpl client = new RpcClientImpl(CONF, HConstants.CLUSTER_ID_DEFAULT);
+    RpcClient client = new RpcClient(CONF, HConstants.CLUSTER_ID_DEFAULT);
     try {
       rpcServer.start();
       verify(scheduler).start();
@@ -312,7 +312,7 @@ public class TestIPC {
     TestRpcServer rpcServer = new TestRpcServer();
     MethodDescriptor md = SERVICE.getDescriptorForType().findMethodByName("echo");
     EchoRequestProto param = EchoRequestProto.newBuilder().setMessage("hello").build();
-    RpcClientImpl client = new RpcClientImpl(conf, HConstants.CLUSTER_ID_DEFAULT);
+    RpcClient client = new RpcClient(conf, HConstants.CLUSTER_ID_DEFAULT);
     KeyValue kv = KeyValueUtil.ensureKeyValue(BIG_CELL);
     Put p = new Put(kv.getRow());
     for (int i = 0; i < cellcount; i++) {
@@ -354,7 +354,7 @@ public class TestIPC {
       LOG.info("Cycled " + cycles + " time(s) with " + cellcount + " cell(s) in " +
          (System.currentTimeMillis() - startTime) + "ms");
     } finally {
-      client.close();
+      client.stop();
       rpcServer.stop();
     }
   }

hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/TestProtoBufRpc.java

@@ -112,7 +112,7 @@ public class TestProtoBufRpc {
 
   @Test
   public void testProtoBufRpc() throws Exception {
-    RpcClient rpcClient = RpcClientFactory.createClient(conf, HConstants.CLUSTER_ID_DEFAULT);
+    RpcClient rpcClient = new RpcClient(conf, HConstants.CLUSTER_ID_DEFAULT);
     try {
       BlockingRpcChannel channel = rpcClient.createBlockingRpcChannel(
           ServerName.valueOf(this.isa.getHostName(), this.isa.getPort(), System.currentTimeMillis()),
@@ -136,7 +136,7 @@ public class TestProtoBufRpc {
       } catch (ServiceException e) {
       }
     } finally {
-      rpcClient.close();
+      rpcClient.stop();
     }
   }
 }

hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestHMasterRPCException.java

@@ -29,7 +29,6 @@ import org.apache.hadoop.hbase.*;
 import org.apache.hadoop.hbase.CoordinatedStateManager;
 import org.apache.hadoop.hbase.CoordinatedStateManagerFactory;
 import org.apache.hadoop.hbase.ipc.RpcClient;
-import org.apache.hadoop.hbase.ipc.RpcClientFactory;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.MasterProtos;
 import org.apache.hadoop.hbase.protobuf.generated.MasterProtos.IsMasterRunningRequest;
@@ -54,7 +53,7 @@ public class TestHMasterRPCException {
     CoordinatedStateManager cp = CoordinatedStateManagerFactory.getCoordinatedStateManager(conf);
     HMaster hm = new HMaster(conf, cp);
     ServerName sm = hm.getServerName();
-    RpcClient rpcClient = RpcClientFactory.createClient(conf, HConstants.CLUSTER_ID_DEFAULT);
+    RpcClient rpcClient = new RpcClient(conf, HConstants.CLUSTER_ID_DEFAULT);
     try {
       int i = 0;
       //retry the RPC a few times; we have seen SocketTimeoutExceptions if we
@@ -89,7 +88,7 @@ public class TestHMasterRPCException {
       }
       fail();
     } finally {
-      rpcClient.close();
+      rpcClient.stop();
     }
   }
 }

hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestSecureRPC.java

@@ -35,7 +35,6 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeys;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.ServerName;
-import org.apache.hadoop.hbase.ipc.RpcClientFactory;
 import org.apache.hadoop.hbase.testclassification.SecurityTests;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.apache.hadoop.hbase.ipc.FifoRpcScheduler;
@@ -100,8 +99,7 @@ public class TestSecureRPC {
         Lists.newArrayList(new RpcServer.BlockingServiceAndInterface(service, null)),
           isa, conf, new FifoRpcScheduler(conf, 1));
     rpcServer.start();
-    RpcClient rpcClient = RpcClientFactory
-        .createClient(conf, HConstants.DEFAULT_CLUSTER_ID.toString());
+    RpcClient rpcClient = new RpcClient(conf, HConstants.DEFAULT_CLUSTER_ID.toString());
     try {
       BlockingRpcChannel channel = rpcClient.createBlockingRpcChannel(
           ServerName.valueOf(rpcServer.getListenerAddress().getHostName(),
@@ -117,7 +115,7 @@ public class TestSecureRPC {
 
       assertEquals(0xDEADBEEF, results.get(0).intValue());
     } finally {
-      rpcClient.close();
+      rpcClient.stop();
     }
   }
 }

hbase-server/src/test/java/org/apache/hadoop/hbase/security/token/TestTokenAuthentication.java

@@ -51,7 +51,6 @@ import org.apache.hadoop.hbase.ipc.BlockingRpcCallback;
 import org.apache.hadoop.hbase.ipc.FifoRpcScheduler;
 import org.apache.hadoop.hbase.ipc.RequestContext;
 import org.apache.hadoop.hbase.ipc.RpcClient;
-import org.apache.hadoop.hbase.ipc.RpcClientFactory;
 import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.ipc.RpcServer.BlockingServiceAndInterface;
 import org.apache.hadoop.hbase.ipc.RpcServerInterface;
@@ -401,7 +400,7 @@ public class TestTokenAuthentication {
     testuser.doAs(new PrivilegedExceptionAction<Object>() {
       public Object run() throws Exception {
         Configuration c = server.getConfiguration();
-        RpcClient rpcClient = RpcClientFactory.createClient(c, clusterId.toString());
+        RpcClient rpcClient = new RpcClient(c, clusterId.toString());
         ServerName sn =
             ServerName.valueOf(server.getAddress().getHostName(), server.getAddress().getPort(),
                 System.currentTimeMillis());
@@ -417,7 +416,7 @@ public class TestTokenAuthentication {
           String authMethod = response.getAuthMethod();
           assertEquals("TOKEN", authMethod);
         } finally {
-          rpcClient.close();
+          rpcClient.stop();
         }
         return null;
       }

hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/TestFlushSnapshotFromClient.java

@@ -43,7 +43,7 @@ import org.apache.hadoop.hbase.TableNotFoundException;
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.HTable;
 import org.apache.hadoop.hbase.client.ScannerCallable;
-import org.apache.hadoop.hbase.ipc.AbstractRpcClient;
+import org.apache.hadoop.hbase.ipc.RpcClient;
 import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.master.HMaster;
 import org.apache.hadoop.hbase.master.snapshot.SnapshotManager;
@@ -88,7 +88,7 @@ public class TestFlushSnapshotFromClient {
     // Uncomment the following lines if more verbosity is needed for
     // debugging (see HBASE-12285 for details).
     //((Log4JLogger)RpcServer.LOG).getLogger().setLevel(Level.ALL);
-    //((Log4JLogger)AbstractRpcClient.LOG).getLogger().setLevel(Level.ALL);
+    //((Log4JLogger)RpcClient.LOG).getLogger().setLevel(Level.ALL);
     //((Log4JLogger)ScannerCallable.LOG).getLogger().setLevel(Level.ALL);
     setupConf(UTIL.getConfiguration());
     UTIL.startMiniCluster(NUM_RS);