This closes #3039

artemis-protocols/artemis-amqp-protocol/src/main/java/org/apache/activemq/artemis/protocol/amqp/broker/AMQPSessionCallback.java

@@ -265,6 +265,8 @@ public class AMQPSessionCallback implements SessionCallback {
                                         SimpleString filter) throws Exception {
       try {
          serverSession.createSharedQueue(address, queueName, routingType, filter, true, -1, false, false, false);
+      } catch (ActiveMQQueueExistsException alreadyExists) {
+         // nothing to be done.. just ignore it. if you have many consumers all doing the same another one probably already done it
       } catch (ActiveMQSecurityException se) {
          throw ActiveMQAMQPProtocolMessageBundle.BUNDLE.securityErrorCreatingConsumer(se.getMessage());
       }

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/jms/consumer/CreateSubscriptionTest.java

@@ -0,0 +1,201 @@
+/*
+ * 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.jms.consumer;
+
+import javax.jms.Connection;
+import javax.jms.ConnectionFactory;
+import javax.jms.MessageConsumer;
+import javax.jms.Session;
+import javax.jms.Topic;
+import java.util.Arrays;
+import java.util.UUID;
+import java.util.concurrent.CyclicBarrier;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.apache.activemq.artemis.api.core.RoutingType;
+import org.apache.activemq.artemis.api.core.SimpleString;
+import org.apache.activemq.artemis.core.server.impl.AddressInfo;
+import org.apache.activemq.artemis.logs.AssertionLoggerHandler;
+import org.apache.activemq.artemis.tests.util.CFUtil;
+import org.apache.activemq.artemis.tests.util.JMSTestBase;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+@RunWith(value = Parameterized.class)
+public class CreateSubscriptionTest extends JMSTestBase {
+
+
+   private final String protocol;
+
+   @Parameterized.Parameters(name = "persistenceEnabled = {0}")
+   public static Iterable<? extends Object> persistenceEnabled() {
+      return Arrays.asList(new Object[][]{{"AMQP"}, {"CORE"}});
+   }
+
+   public CreateSubscriptionTest(String protocol) {
+      this.protocol = protocol;
+   }
+
+   @Test
+   public void testSharedConsumer() throws Exception {
+
+      server.addAddressInfo(new AddressInfo(SimpleString.toSimpleString("myTopic")).addRoutingType(RoutingType.MULTICAST));
+      ConnectionFactory cf = CFUtil.createConnectionFactory(protocol, "tcp://localhost:61616");
+      Connection connection = cf.createConnection();
+      Session session = connection.createSession();
+      Connection connecton2 = cf.createConnection();
+      Session session2 = connecton2.createSession();
+
+      try {
+
+         Topic topic = session.createTopic("myTopic");
+
+         MessageConsumer messageConsumer = session.createSharedConsumer(topic, "consumer1");
+         MessageConsumer messageConsumer2 = session2.createSharedConsumer(topic, "consumer1");
+
+
+
+         connection.close();
+      } finally {
+         connection.close();
+         connecton2.close();
+      }
+   }
+
+   @Test
+   public void testSharedDurableConsumer() throws Exception {
+
+      server.addAddressInfo(new AddressInfo(SimpleString.toSimpleString("myTopic")).addRoutingType(RoutingType.MULTICAST));
+      ConnectionFactory cf = CFUtil.createConnectionFactory(protocol, "tcp://localhost:61616");
+      Connection connection = cf.createConnection();
+      Session session = connection.createSession();
+      Connection connecton2 = cf.createConnection();
+      Session session2 = connecton2.createSession();
+
+      try {
+
+         Topic topic = session.createTopic("myTopic");
+
+         MessageConsumer messageConsumer = session.createSharedDurableConsumer(topic, "consumer1");
+         MessageConsumer messageConsumer2 = session2.createSharedDurableConsumer(topic, "consumer1");
+
+
+
+         connection.close();
+      } finally {
+         connection.close();
+         connecton2.close();
+      }
+   }
+
+
+   @Test
+   public void testCreateManyConsumersDurable() throws Exception {
+      testCreateManyConsumers("createSharedDurableConsumer");
+   }
+
+   @Test
+   public void testCreateManyConsumersNonDurable() throws Exception {
+      testCreateManyConsumers("createSharedConsumer");
+   }
+
+   @Test
+   public void testDurableSubscriber() throws Exception {
+      testCreateManyConsumers("createDurableSubscriber");
+   }
+
+   @Test
+   public void testNonDurableSubscriber() throws Exception {
+      testCreateManyConsumers("createConsumer");
+   }
+
+   public void testCreateManyConsumers(String queueType) throws Exception {
+
+      AssertionLoggerHandler.startCapture();
+
+      try {
+
+         server.addAddressInfo(new AddressInfo(SimpleString.toSimpleString("myTopic")).addRoutingType(RoutingType.MULTICAST));
+         ConnectionFactory cf = CFUtil.createConnectionFactory(protocol, "tcp://localhost:61616");
+
+         AtomicInteger errors = new AtomicInteger(0);
+
+         Thread[] threads = new Thread[10];
+         CyclicBarrier startBarrier = new CyclicBarrier(threads.length);
+         CyclicBarrier closeBarrier = new CyclicBarrier(threads.length);
+
+         Runnable runnable = new Runnable() {
+            @Override
+            public void run() {
+               Connection connection = null;
+               try {
+                  connection = cf.createConnection();
+                  if (queueType.equals("createDurableSubscriber")) {
+                     connection.setClientID(UUID.randomUUID().toString());
+                  }
+                  Session session = connection.createSession();
+                  Topic topic = session.createTopic("myTopic");
+                  startBarrier.await(10, TimeUnit.SECONDS);
+
+                  if (queueType.equals("createSharedDurableConsumer")) {
+                     MessageConsumer messageConsumer = session.createSharedDurableConsumer(topic, "consumer1");
+                  } else if (queueType.equals("createSharedConsumer")) {
+                     MessageConsumer messageConsumer = session.createSharedConsumer(topic, "consumer1");
+                  } else if (queueType.equals("createDurableSubscriber")) {
+                     session.createDurableSubscriber(topic, "name", null, false);
+                  } else if (queueType.equals("createDurableSubscriber")) {
+                     session.createConsumer(topic);
+                  }
+
+               } catch (Exception e) {
+                  e.printStackTrace();
+                  errors.incrementAndGet();
+               } finally {
+                  try {
+                     closeBarrier.await(10, TimeUnit.SECONDS);
+                     if (connection != null) {
+                        connection.close();
+                     }
+                  } catch (Exception ignored) {
+                  }
+               }
+
+            }
+         };
+
+         for (int i = 0; i < threads.length; i++) {
+            threads[i] = new Thread(null, runnable, "test " + i);
+            threads[i].start();
+         }
+
+         for (int i = 0; i < threads.length; i++) {
+            threads[i].join();
+         }
+
+         Assert.assertEquals(0, errors.get());
+         Assert.assertFalse(AssertionLoggerHandler.findText("AMQ229018"));
+      } finally {
+         AssertionLoggerHandler.stopCapture();
+      }
+
+   }
+
+}