HDFS-11137. Ozone: SCM: Add negative tests cases for datanodeStatemachine. Contributed by Weiwei Yang.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/OzoneClientUtils.java

@@ -29,7 +29,9 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.net.InetSocketAddress;
+import java.util.Collection;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
@@ -82,6 +84,44 @@ public final class OzoneClientUtils {
     // Never constructed
   }
 
+  /**
+   * Retrieve the socket addresses of all storage container managers.
+   *
+   * @param conf
+   * @return A collection of SCM addresses
+   * @throws IllegalArgumentException If the configuration is invalid
+   */
+  public static Collection<InetSocketAddress> getSCMAddresses(
+      Configuration conf) throws IllegalArgumentException {
+    Collection<InetSocketAddress> addresses =
+        new HashSet<InetSocketAddress>();
+    Collection<String> names =
+        conf.getTrimmedStringCollection(OzoneConfigKeys.OZONE_SCM_NAMES);
+    if (names == null || names.isEmpty()) {
+      throw new IllegalArgumentException(OzoneConfigKeys.OZONE_SCM_NAMES
+          + " need to be a set of valid DNS names or IP addresses."
+          + " Null or empty address list found.");
+    }
+
+    final com.google.common.base.Optional<Integer>
+        defaultPort =  com.google.common.base.Optional.of(OzoneConfigKeys
+        .OZONE_SCM_DEFAULT_PORT);
+    for (String address : names) {
+      com.google.common.base.Optional<String> hostname =
+          OzoneClientUtils.getHostName(address);
+      if (!hostname.isPresent()) {
+        throw new IllegalArgumentException("Invalid hostname for SCM: "
+            + hostname);
+      }
+      com.google.common.base.Optional<Integer> port =
+          OzoneClientUtils.getHostPort(address);
+      InetSocketAddress addr = NetUtils.createSocketAddr(hostname.get(),
+          port.or(defaultPort.get()));
+      addresses.add(addr);
+    }
+    return addresses;
+  }
+
   /**
    * Retrieve the socket address that should be used by clients to connect
    * to the SCM.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/states/datanode/InitDatanodeState.java

@@ -16,11 +16,9 @@
  */
 package org.apache.hadoop.ozone.container.common.states.datanode;
 
-import com.google.common.base.Optional;
+import com.google.common.base.Strings;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.net.NetUtils;
 import org.apache.hadoop.ozone.OzoneClientUtils;
-import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine;
 import org.apache.hadoop.ozone.container.common.statemachine.SCMConnectionManager;
 import org.apache.hadoop.ozone.container.common.statemachine.StateContext;
@@ -29,6 +27,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.net.InetSocketAddress;
+import java.util.Collection;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
@@ -70,26 +69,23 @@ public class InitDatanodeState implements DatanodeState,
    */
   @Override
   public DatanodeStateMachine.DatanodeStates call() throws Exception {
-    String[] addresses = conf.getStrings(OzoneConfigKeys.OZONE_SCM_NAMES);
-    final Optional<Integer> defaultPort =  Optional.of(OzoneConfigKeys
-        .OZONE_SCM_DEFAULT_PORT);
-
-    if (addresses == null || addresses.length <= 0) {
-      LOG.error("SCM addresses need to be a set of valid DNS names " +
-          "or IP addresses. Null or empty address list found. Aborting " +
-          "containers.");
+    Collection<InetSocketAddress> addresses = null;
+    try {
+      addresses = OzoneClientUtils.getSCMAddresses(conf);
+    } catch (IllegalArgumentException e) {
+      if(!Strings.isNullOrEmpty(e.getMessage())) {
+        LOG.error("Failed to get SCM addresses: " + e.getMessage());
+      }
       return DatanodeStateMachine.DatanodeStates.SHUTDOWN;
     }
-    for (String address : addresses) {
-      Optional<String> hostname = OzoneClientUtils.getHostName(address);
-      if (!hostname.isPresent()) {
-        LOG.error("Invalid hostname for SCM.");
-        return DatanodeStateMachine.DatanodeStates.SHUTDOWN;
+
+    if (addresses == null || addresses.isEmpty()) {
+      LOG.error("Null or empty SCM address list found.");
+      return DatanodeStateMachine.DatanodeStates.SHUTDOWN;
+    } else {
+      for (InetSocketAddress addr : addresses) {
+        connectionManager.addSCMServer(addr);
       }
-      Optional<Integer> port = OzoneClientUtils.getHostPort(address);
-      InetSocketAddress addr = NetUtils.createSocketAddr(hostname.get(),
-          port.or(defaultPort.get()));
-      connectionManager.addSCMServer(addr);
     }
     return this.context.getState().getNextState();
   }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/TestOzoneClientUtils.java

@@ -26,11 +26,15 @@ import org.junit.Rule;
 import org.junit.rules.Timeout;
 
 import java.net.InetSocketAddress;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
 
 import static org.apache.hadoop.ozone.OzoneConfigKeys.*;
 import static org.hamcrest.core.Is.is;
 import static org.junit.Assert.assertThat;
-
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 
 /**
  * This test class verifies the parsing of SCM endpoint config settings.
@@ -217,4 +221,104 @@ public class TestOzoneClientUtils {
     assertThat(addr.getHostString(), is("5.6.7.8"));
     assertThat(addr.getPort(), is(200));
   }
+
+  @Test
+  public void testGetSCMAddresses() {
+    final Configuration conf = new OzoneConfiguration();
+    Collection<InetSocketAddress> addresses = null;
+    InetSocketAddress addr = null;
+    Iterator<InetSocketAddress> it = null;
+
+    // Verify valid IP address setup
+    conf.setStrings(OZONE_SCM_NAMES, "1.2.3.4");
+    addresses = OzoneClientUtils.getSCMAddresses(conf);
+    assertThat(addresses.size(), is(1));
+    addr = addresses.iterator().next();
+    assertThat(addr.getHostName(), is("1.2.3.4"));
+    assertThat(addr.getPort(), is(OZONE_SCM_DEFAULT_PORT));
+
+    // Verify valid hostname setup
+    conf.setStrings(OZONE_SCM_NAMES, "scm1");
+    addresses = OzoneClientUtils.getSCMAddresses(conf);
+    assertThat(addresses.size(), is(1));
+    addr = addresses.iterator().next();
+    assertThat(addr.getHostName(), is("scm1"));
+    assertThat(addr.getPort(), is(OZONE_SCM_DEFAULT_PORT));
+
+    // Verify valid hostname and port
+    conf.setStrings(OZONE_SCM_NAMES, "scm1:1234");
+    addresses = OzoneClientUtils.getSCMAddresses(conf);
+    assertThat(addresses.size(), is(1));
+    addr = addresses.iterator().next();
+    assertThat(addr.getHostName(), is("scm1"));
+    assertThat(addr.getPort(), is(1234));
+
+    final HashMap<String, Integer> hostsAndPorts =
+        new HashMap<String, Integer>();
+    hostsAndPorts.put("scm1", 1234);
+    hostsAndPorts.put("scm2", 2345);
+    hostsAndPorts.put("scm3", 3456);
+
+    // Verify multiple hosts and port
+    conf.setStrings(OZONE_SCM_NAMES, "scm1:1234,scm2:2345,scm3:3456");
+    addresses = OzoneClientUtils.getSCMAddresses(conf);
+    assertThat(addresses.size(), is(3));
+    it = addresses.iterator();
+    HashMap<String, Integer> expected1 = new HashMap<>(hostsAndPorts);
+    while(it.hasNext()) {
+      InetSocketAddress current = it.next();
+      assertTrue(expected1.remove(current.getHostName(),
+          current.getPort()));
+    }
+    assertTrue(expected1.isEmpty());
+
+    // Verify names with spaces
+    conf.setStrings(OZONE_SCM_NAMES, " scm1:1234, scm2:2345 , scm3:3456 ");
+    addresses = OzoneClientUtils.getSCMAddresses(conf);
+    assertThat(addresses.size(), is(3));
+    it = addresses.iterator();
+    HashMap<String, Integer> expected2 = new HashMap<>(hostsAndPorts);
+    while(it.hasNext()) {
+      InetSocketAddress current = it.next();
+      assertTrue(expected2.remove(current.getHostName(),
+          current.getPort()));
+    }
+    assertTrue(expected2.isEmpty());
+
+    // Verify empty value
+    conf.setStrings(OZONE_SCM_NAMES, "");
+    try {
+      addresses = OzoneClientUtils.getSCMAddresses(conf);
+      fail("Empty value should cause an IllegalArgumentException");
+    } catch (Exception e) {
+      assertTrue(e instanceof IllegalArgumentException);
+    }
+
+    // Verify invalid hostname
+    conf.setStrings(OZONE_SCM_NAMES, "s..x..:1234");
+    try {
+      addresses = OzoneClientUtils.getSCMAddresses(conf);
+      fail("An invalid hostname should cause an IllegalArgumentException");
+    } catch (Exception e) {
+      assertTrue(e instanceof IllegalArgumentException);
+    }
+
+    // Verify invalid port
+    conf.setStrings(OZONE_SCM_NAMES, "scm:xyz");
+    try {
+      addresses = OzoneClientUtils.getSCMAddresses(conf);
+      fail("An invalid port should cause an IllegalArgumentException");
+    } catch (Exception e) {
+      assertTrue(e instanceof IllegalArgumentException);
+    }
+
+    // Verify a mixed case (valid and invalid value both appears)
+    conf.setStrings(OZONE_SCM_NAMES, "scm1:1234, scm:xyz");
+    try {
+      addresses = OzoneClientUtils.getSCMAddresses(conf);
+      fail("An invalid value should cause an IllegalArgumentException");
+    } catch (Exception e) {
+      assertTrue(e instanceof IllegalArgumentException);
+    }
+  }
 }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/common/TestDatanodeStateMachine.java

@@ -261,4 +261,36 @@ public class TestDatanodeStateMachine {
       Assert.assertEquals(1, mock.getHeartbeatCount());
     }
   }
+
+  /**
+   * Test state transition with a list of invalid SCM names,
+   * and verify the state transits to SHUTDOWN each time.
+   */
+  @Test
+  public void testDatanodeStateMachineWithInvalidSCMNames()
+      throws Exception {
+    for (String name : new String[] {
+        "",          // Empty
+        "x..y",      // Invalid schema
+        "scm:",      // Missing port
+        "scm:xyz",   // Invalid port
+        "scm:123456" // Port out of range
+    }) {
+      conf.setStrings(OzoneConfigKeys.OZONE_SCM_NAMES, name);
+      final DatanodeStateMachine stateMachine =
+          new DatanodeStateMachine(conf);
+      DatanodeStateMachine.DatanodeStates currentState =
+          stateMachine.getContext().getState();
+      Assert.assertEquals(DatanodeStateMachine.DatanodeStates.INIT,
+          currentState);
+
+      DatanodeState<DatanodeStateMachine.DatanodeStates> task =
+          stateMachine.getContext().getTask();
+      task.execute(executorService);
+      DatanodeStateMachine.DatanodeStates newState =
+          task.await(2, TimeUnit.SECONDS);
+      Assert.assertEquals(DatanodeStateMachine.DatanodeStates.SHUTDOWN,
+          newState);
+    }
+  }
 }