ARTEMIS-1112: Added wait-for-activation option to shared-store-master config

Added a wait-for-activation option to shared-store master HA policies.
This option is enabled by default to ensure unchanged server startup behavior.

If this option is enabled, ActiveMQServer.start() with a shared-store master server will not return
before the server has been activated.
If this options is disabled, start() will return after a background activation thread has been started.
The caller can use waitForActivation() to wait until server is activated, or just check the current activation status.

artemis-core-client/src/main/java/org/apache/activemq/artemis/api/config/ActiveMQDefaultConfiguration.java

@@ -395,6 +395,9 @@ public final class ActiveMQDefaultConfiguration {
    // Will this backup server come live on a normal server shutdown
    private static boolean DEFAULT_FAILOVER_ON_SERVER_SHUTDOWN = false;
 
+   // Will a shared-store master startup wait for activation
+   private static boolean  DEFAULT_WAIT_FOR_ACTIVATION = true;
+
    // Will the broker populate the message with the name of the validated user
    private static boolean DEFAULT_POPULATE_VALIDATED_USER = false;
 
@@ -1113,6 +1116,13 @@ public final class ActiveMQDefaultConfiguration {
       return DEFAULT_FAILOVER_ON_SERVER_SHUTDOWN;
    }
 
+   /**
+    * Will a shared-store master startup wait for activation
+    */
+   public static boolean isDefaultWaitForActivation() {
+      return DEFAULT_WAIT_FOR_ACTIVATION;
+   }
+
    /**
     * Will the broker populate the message with the name of the validated user
     */

artemis-server/src/main/java/org/apache/activemq/artemis/core/config/ConfigurationUtils.java

@@ -80,7 +80,7 @@ public final class ConfigurationUtils {
          }
          case SHARED_STORE_MASTER: {
             SharedStoreMasterPolicyConfiguration pc = (SharedStoreMasterPolicyConfiguration) conf;
-            return new SharedStoreMasterPolicy(pc.isFailoverOnServerShutdown());
+            return new SharedStoreMasterPolicy(pc.isFailoverOnServerShutdown(), pc.isWaitForActivation());
          }
          case SHARED_STORE_SLAVE: {
             SharedStoreSlavePolicyConfiguration pc = (SharedStoreSlavePolicyConfiguration) conf;

artemis-server/src/main/java/org/apache/activemq/artemis/core/config/ha/SharedStoreMasterPolicyConfiguration.java

@@ -22,6 +22,7 @@ import org.apache.activemq.artemis.core.config.HAPolicyConfiguration;
 public class SharedStoreMasterPolicyConfiguration implements HAPolicyConfiguration {
 
    private boolean failoverOnServerShutdown = ActiveMQDefaultConfiguration.isDefaultFailoverOnServerShutdown();
+   private boolean waitForActivation = ActiveMQDefaultConfiguration.isDefaultWaitForActivation();
 
    public SharedStoreMasterPolicyConfiguration() {
    }
@@ -49,4 +50,13 @@ public class SharedStoreMasterPolicyConfiguration implements HAPolicyConfigurati
       this.failoverOnServerShutdown = failoverOnServerShutdown;
       return this;
    }
+
+   public boolean isWaitForActivation() {
+      return waitForActivation;
+   }
+
+   public SharedStoreMasterPolicyConfiguration setWaitForActivation(Boolean waitForActivation) {
+      this.waitForActivation = waitForActivation;
+      return this;
+   }
 }

artemis-server/src/main/java/org/apache/activemq/artemis/core/deployers/impl/FileConfigurationParser.java

@@ -1241,6 +1241,7 @@ public final class FileConfigurationParser extends XMLConfigurationUtil {
       SharedStoreMasterPolicyConfiguration configuration = new SharedStoreMasterPolicyConfiguration();
 
       configuration.setFailoverOnServerShutdown(getBoolean(policyNode, "failover-on-shutdown", configuration.isFailoverOnServerShutdown()));
+      configuration.setWaitForActivation(getBoolean(policyNode, "wait-for-activation", configuration.isWaitForActivation()));
 
       return configuration;
    }

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/ActiveMQServerLogger.java

@@ -40,6 +40,7 @@ import java.util.concurrent.Executor;
 import java.util.concurrent.ExecutorService;
 
 import io.netty.channel.Channel;
+
 import org.apache.activemq.artemis.api.core.ActiveMQExceptionType;
 import org.apache.activemq.artemis.api.core.Pair;
 import org.apache.activemq.artemis.api.core.SimpleString;
@@ -998,8 +999,8 @@ public interface ActiveMQServerLogger extends BasicLogger {
    void errorCompletingCallbackOnReplicationManager(@Cause Throwable e);
 
    @LogMessage(level = Logger.Level.WARN)
-   @Message(id = 222158, value = "{0} backup activation thread did not finish.", format = Message.Format.MESSAGE_FORMAT)
+   @Message(id = 222158, value = "{0} activation thread did not finish.", format = Message.Format.MESSAGE_FORMAT)
-   void backupActivationDidntFinish(ActiveMQServer server);
+   void activationDidntFinish(ActiveMQServer server);
 
    @LogMessage(level = Logger.Level.WARN)
    @Message(id = 222159, value = "unable to send notification when broadcast group is stopped", format = Message.Format.MESSAGE_FORMAT)
@@ -1209,9 +1210,9 @@ public interface ActiveMQServerLogger extends BasicLogger {
 
    @LogMessage(level = Logger.Level.WARN)
    @Message(id = 222201,
-      value = "Timed out waiting for backup activation to exit",
+      value = "Timed out waiting for activation to exit",
       format = Message.Format.MESSAGE_FORMAT)
-   void backupActivationTimeout();
+   void activationTimeout();
 
    @LogMessage(level = Logger.Level.WARN)
    @Message(id = 222202,

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/cluster/ha/HAPolicy.java

@@ -18,6 +18,7 @@ package org.apache.activemq.artemis.core.server.cluster.ha;
 
 import java.util.Map;
 
+import org.apache.activemq.artemis.api.config.ActiveMQDefaultConfiguration;
 import org.apache.activemq.artemis.core.server.impl.Activation;
 import org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl;
 
@@ -39,6 +40,10 @@ public interface HAPolicy<T extends Activation> {
 
    boolean isBackup();
 
+   default boolean isWaitForActivation() {
+      return ActiveMQDefaultConfiguration.isDefaultWaitForActivation();
+   }
+
    boolean canScaleDown();
 
    /*

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/cluster/ha/SharedStoreMasterPolicy.java

@@ -26,14 +26,16 @@ import org.apache.activemq.artemis.core.server.impl.SharedStoreLiveActivation;
 public class SharedStoreMasterPolicy implements HAPolicy<LiveActivation> {
 
    private boolean failoverOnServerShutdown = ActiveMQDefaultConfiguration.isDefaultFailoverOnServerShutdown();
+   private boolean waitForActivation = ActiveMQDefaultConfiguration.isDefaultWaitForActivation();
 
    private SharedStoreSlavePolicy sharedStoreSlavePolicy;
 
    public SharedStoreMasterPolicy() {
    }
 
-   public SharedStoreMasterPolicy(boolean failoverOnServerShutdown) {
+   public SharedStoreMasterPolicy(boolean failoverOnServerShutdown, boolean waitForActivation) {
       this.failoverOnServerShutdown = failoverOnServerShutdown;
+      this.waitForActivation = waitForActivation;
    }
 
    @Deprecated
@@ -53,6 +55,15 @@ public class SharedStoreMasterPolicy implements HAPolicy<LiveActivation> {
       this.failoverOnServerShutdown = failoverOnServerShutdown;
    }
 
+   @Override
+   public boolean isWaitForActivation() {
+      return waitForActivation;
+   }
+
+   public void setWaitForActivation(boolean waitForActivation) {
+      this.waitForActivation = waitForActivation;
+   }
+
    public SharedStoreSlavePolicy getSharedStoreSlavePolicy() {
       return sharedStoreSlavePolicy;
    }

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/cluster/ha/SharedStoreSlavePolicy.java

@@ -29,6 +29,8 @@ public class SharedStoreSlavePolicy extends BackupPolicy {
 
    private boolean allowAutoFailBack = ActiveMQDefaultConfiguration.isDefaultAllowAutoFailback();
 
+   private boolean isWaitForActivation = ActiveMQDefaultConfiguration.isDefaultWaitForActivation();
+
    //this is how we act once we have failed over
    private SharedStoreMasterPolicy sharedStoreMasterPolicy;
 
@@ -64,7 +66,7 @@ public class SharedStoreSlavePolicy extends BackupPolicy {
 
    public SharedStoreMasterPolicy getSharedStoreMasterPolicy() {
       if (sharedStoreMasterPolicy == null) {
-         sharedStoreMasterPolicy = new SharedStoreMasterPolicy(failoverOnServerShutdown);
+         sharedStoreMasterPolicy = new SharedStoreMasterPolicy(failoverOnServerShutdown, isWaitForActivation);
       }
       return sharedStoreMasterPolicy;
    }
@@ -91,6 +93,10 @@ public class SharedStoreSlavePolicy extends BackupPolicy {
       this.allowAutoFailBack = allowAutoFailBack;
    }
 
+   public void setIsWaitForActivation(boolean isWaitForActivation) {
+      this.isWaitForActivation = isWaitForActivation;
+   }
+
    @Override
    public Activation createActivation(ActiveMQServerImpl server,
                                       boolean wasLive,

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/ActiveMQServerImpl.java

@@ -306,7 +306,7 @@ public class ActiveMQServerImpl implements ActiveMQServer {
    // Used to identify the server on tests... useful on debugging testcases
    private String identity;
 
-   private Thread backupActivationThread;
+   private Thread activationThread;
 
    private Activation activation;
 
@@ -514,7 +514,15 @@ public class ActiveMQServerImpl implements ActiveMQServer {
          if (!haPolicy.isBackup()) {
             activation = haPolicy.createActivation(this, false, activationParams, shutdownOnCriticalIO);
 
-            activation.run();
+            if (haPolicy.isWaitForActivation()) {
+               activation.run();
+            } else {
+               if (logger.isTraceEnabled()) {
+                  logger.trace("starting activation");
+               }
+               activationThread = new ActivationThread(activation, ActiveMQMessageBundle.BUNDLE.activationForServer(this));
+               activationThread.start();
+            }
          }
          // The activation on fail-back may change the value of isBackup, for that reason we are
          // checking again here
@@ -528,8 +536,8 @@ public class ActiveMQServerImpl implements ActiveMQServer {
             if (logger.isTraceEnabled()) {
                logger.trace("starting backupActivation");
             }
-            backupActivationThread = new ActivationThread(activation, ActiveMQMessageBundle.BUNDLE.activationForServer(this));
+            activationThread = new ActivationThread(activation, ActiveMQMessageBundle.BUNDLE.activationForServer(this));
-            backupActivationThread.start();
+            activationThread.start();
          } else {
             ActiveMQServerLogger.LOGGER.serverStarted(getVersion().getFullVersion(), configuration.getName(), nodeManager.getNodeId(), identity != null ? identity : "");
          }
@@ -583,24 +591,24 @@ public class ActiveMQServerImpl implements ActiveMQServer {
       return state;
    }
 
-   public void interrupBackupThread(NodeManager nodeManagerInUse) throws InterruptedException {
+   public void interruptActivationThread(NodeManager nodeManagerInUse) throws InterruptedException {
       long timeout = 30000;
 
       long start = System.currentTimeMillis();
 
-      while (backupActivationThread.isAlive() && System.currentTimeMillis() - start < timeout) {
+      while (activationThread.isAlive() && System.currentTimeMillis() - start < timeout) {
          if (nodeManagerInUse != null) {
             nodeManagerInUse.interrupt();
          }
 
-         backupActivationThread.interrupt();
+         activationThread.interrupt();
 
-         backupActivationThread.join(1000);
+         activationThread.join(1000);
 
       }
 
       if (System.currentTimeMillis() - start >= timeout) {
-         ActiveMQServerLogger.LOGGER.backupActivationTimeout();
+         ActiveMQServerLogger.LOGGER.activationTimeout();
          threadDump();
       }
    }
@@ -1021,16 +1029,16 @@ public class ActiveMQServerImpl implements ActiveMQServer {
          }
       }
 
-      if (backupActivationThread != null) {
+      if (activationThread != null) {
          try {
-            backupActivationThread.join(30000);
+            activationThread.join(30000);
          } catch (InterruptedException e) {
-            ActiveMQServerLogger.LOGGER.interruptWhilstStoppingComponent(backupActivationThread.getClass().getName());
+            ActiveMQServerLogger.LOGGER.interruptWhilstStoppingComponent(activationThread.getClass().getName());
          }
 
-         if (backupActivationThread.isAlive()) {
+         if (activationThread.isAlive()) {
-            ActiveMQServerLogger.LOGGER.backupActivationDidntFinish(this);
+            ActiveMQServerLogger.LOGGER.activationDidntFinish(this);
-            backupActivationThread.interrupt();
+            activationThread.interrupt();
          }
       }
 

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/SharedNothingBackupActivation.java

@@ -362,7 +362,7 @@ public final class SharedNothingBackupActivation extends Activation {
          // To avoid a NPE cause by the stop
          NodeManager nodeManagerInUse = activeMQServer.getNodeManager();
 
-         activeMQServer.interrupBackupThread(nodeManagerInUse);
+         activeMQServer.interruptActivationThread(nodeManagerInUse);
 
          if (nodeManagerInUse != null) {
             nodeManagerInUse.stopBackup();

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/SharedStoreBackupActivation.java

@@ -141,7 +141,7 @@ public final class SharedStoreBackupActivation extends Activation {
       //we need to check as the servers policy may have changed
       if (activeMQServer.getHAPolicy().isBackup()) {
 
-         activeMQServer.interrupBackupThread(nodeManagerInUse);
+         activeMQServer.interruptActivationThread(nodeManagerInUse);
 
          if (nodeManagerInUse != null) {
             nodeManagerInUse.stopBackup();

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/SharedStoreLiveActivation.java

@@ -58,6 +58,10 @@ public final class SharedStoreLiveActivation extends LiveActivation {
                logger.debug("announcing backup to the former live" + this);
             }
             activeMQServer.getBackupManager().start();
+
+            if (!sharedStoreMasterPolicy.isWaitForActivation())
+               activeMQServer.setState(ActiveMQServerImpl.SERVER_STATE.STARTED);
+
             activeMQServer.getBackupManager().announceBackup();
          }
 

artemis-server/src/main/resources/schema/artemis-configuration.xsd

@@ -2159,6 +2159,13 @@
                </xsd:documentation>
             </xsd:annotation>
          </xsd:element>
+         <xsd:element name="wait-for-activation" type="xsd:boolean" default="true" maxOccurs="1" minOccurs="0">
+            <xsd:annotation>
+               <xsd:documentation>
+                  Will the master startup wait until it is activated
+               </xsd:documentation>
+            </xsd:annotation>
+         </xsd:element>
       </xsd:all>
    </xsd:complexType>
    <xsd:complexType name="sharedStoreSlavePolicyType">

artemis-server/src/test/java/org/apache/activemq/artemis/core/config/impl/FileConfigurationParserTest.java

@@ -24,7 +24,9 @@ import java.util.Map;
 import org.apache.activemq.artemis.api.config.ActiveMQDefaultConfiguration;
 import org.apache.activemq.artemis.core.config.Configuration;
 import org.apache.activemq.artemis.core.config.FileDeploymentManager;
+import org.apache.activemq.artemis.core.config.HAPolicyConfiguration;
 import org.apache.activemq.artemis.core.config.WildcardConfiguration;
+import org.apache.activemq.artemis.core.config.ha.SharedStoreMasterPolicyConfiguration;
 import org.apache.activemq.artemis.core.deployers.impl.FileConfigurationParser;
 import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
 import org.apache.activemq.artemis.utils.DefaultSensitiveStringCodec;
@@ -102,6 +104,23 @@ public class FileConfigurationParserTest extends ActiveMQTestBase {
       assertEquals('*', wildCard.getSingleWord());
    }
 
+   @Test
+   public void testParsingHaSharedStoreWaitForActivation() throws Exception {
+      FileConfigurationParser parser = new FileConfigurationParser();
+
+      String configStr = firstPart + "<ha-policy><shared-store><master><wait-for-activation>false</wait-for-activation></master></shared-store></ha-policy>" + lastPart;
+      ByteArrayInputStream input = new ByteArrayInputStream(configStr.getBytes(StandardCharsets.UTF_8));
+
+      Configuration config = parser.parseMainConfig(input);
+      HAPolicyConfiguration haConfig = config.getHAPolicyConfiguration();
+
+      assertTrue(haConfig instanceof SharedStoreMasterPolicyConfiguration);
+
+      SharedStoreMasterPolicyConfiguration masterConfig = (SharedStoreMasterPolicyConfiguration) haConfig;
+
+      assertFalse(masterConfig.isWaitForActivation());
+   }
+
    @Test
    public void testParsingDefaultServerConfig() throws Exception {
       FileConfigurationParser parser = new FileConfigurationParser();

docs/user-manual/en/ha.md

@@ -505,6 +505,12 @@ HA strategy shared store for `master`:
         Note that if false you want failover to occur the you
         can use the the management API as explained at [Management](management.md)</td>
     </tr>
+    <tr>
+        <td>`wait-for-activation`</td>
+        <td>If set to true then server startup will wait until it is activated.
+        If set to false then server startup will be done in the background.
+        Default is true.</td>
+    </tr>
     </tbody>
 </table>
 

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/cluster/failover/SharedStoreDontWaitForActivationTest.java

@@ -0,0 +1,104 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.artemis.tests.integration.cluster.failover;
+
+import java.util.concurrent.TimeUnit;
+
+import org.apache.activemq.artemis.core.config.Configuration;
+import org.apache.activemq.artemis.core.config.ha.SharedStoreMasterPolicyConfiguration;
+import org.apache.activemq.artemis.core.server.ActiveMQServer;
+import org.apache.activemq.artemis.core.server.cluster.impl.MessageLoadBalancingType;
+import org.apache.activemq.artemis.tests.integration.cluster.distribution.ClusterTestBase;
+import org.junit.Before;
+import org.junit.Test;
+
+public class SharedStoreDontWaitForActivationTest extends ClusterTestBase {
+
+   @Override
+   @Before
+   public void setUp() throws Exception {
+      super.setUp();
+
+      setupServers();
+   }
+
+   private void setupServers() throws Exception {
+      // Two live servers with same shared storage, using a shared lock file
+
+      // 1. configure 0 as backup of one to share the same node manager and file
+      // storage locations
+      setupBackupServer(0, 1, isFileStorage(), true, isNetty());
+      setupLiveServer(1, isFileStorage(), true, isNetty(), false);
+
+      // now reconfigure the HA policy for both servers to master with automatic
+      // failover and wait-for-activation disabled.
+      setupSharedStoreMasterPolicy(0);
+      setupSharedStoreMasterPolicy(1);
+
+      // configure cluster for bother servers
+      setupClusterConnection("cluster", "queues", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 0, 1);
+      setupClusterConnection("cluster", "queues", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 1, 0);
+   }
+
+   private void setupSharedStoreMasterPolicy(int node) {
+      ActiveMQServer server = getServer(node);
+      SharedStoreMasterPolicyConfiguration liveConfiguration = new SharedStoreMasterPolicyConfiguration();
+      liveConfiguration.setFailoverOnServerShutdown(true);
+      liveConfiguration.setWaitForActivation(false);
+
+      Configuration config = server.getConfiguration();
+
+      config.setHAPolicyConfiguration(liveConfiguration);
+   }
+
+   private boolean isNetty() {
+      return true;
+   }
+
+   @Test
+   public void startupLiveAndBackups() throws Exception {
+      ActiveMQServer server0 = getServer(0);
+      ActiveMQServer server1 = getServer(1);
+
+      server0.start();
+      // server 0 is live
+      assertTrue(server1.waitForActivation(5, TimeUnit.SECONDS));
+      server1.start();
+      // server 1 is backup
+      assertFalse(server1.waitForActivation(1, TimeUnit.SECONDS));
+
+      setupSessionFactory(0, isNetty());
+      createQueue(0, "queues.testaddress", "queue0", null, false);
+
+      server0.stop();
+      // now server 1 becomes live
+      assertTrue(server1.waitForActivation(5, TimeUnit.SECONDS));
+
+      server0.start();
+      // after restart, server 0 becomes backup
+      assertFalse(server0.waitForActivation(1, TimeUnit.SECONDS));
+
+      server1.stop();
+      // now server 0 becomes live again
+      assertTrue(server0.waitForActivation(5, TimeUnit.SECONDS));
+
+      server1.start();
+
+      // after restart, server 1 becomes backup again
+      assertFalse(server1.waitForActivation(1, TimeUnit.SECONDS));
+   }
+}