clebertsuconic commented on code in PR #4705:
URL: https://github.com/apache/activemq-artemis/pull/4705#discussion_r1465340237


##########
tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/cluster/distribution/ClusterNotificationsTest.java:
##########
@@ -0,0 +1,124 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.distribution;
+
+import javax.jms.Connection;
+import javax.jms.MessageListener;
+import javax.jms.Queue;
+import javax.jms.Session;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+
+import 
org.apache.activemq.artemis.core.server.cluster.impl.MessageLoadBalancingType;
+import org.apache.activemq.artemis.core.settings.impl.AddressSettings;
+import org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory;
+import org.apache.activemq.artemis.jms.client.ActiveMQDestination;
+import org.apache.activemq.artemis.logs.AssertionLoggerHandler;
+import org.junit.Test;
+import org.springframework.jms.connection.CachingConnectionFactory;
+import org.springframework.jms.listener.AbstractJmsListeningContainer;
+import org.springframework.jms.listener.DefaultMessageListenerContainer;
+import org.springframework.util.backoff.FixedBackOff;
+
+public class ClusterNotificationsTest extends ClusterTestBase {
+
+   protected boolean isNetty() {
+      return true;
+   }
+
+   @Test
+   public void testClusterNotificationsContinuity() throws Exception {
+      final MessageLoadBalancingType lbType = 
MessageLoadBalancingType.OFF_WITH_REDISTRIBUTION;
+      final String namePrefix = "TEST.QUEUE.";
+      final int queueCount = 500;
+
+      AssertionLoggerHandler loggerHandler = new AssertionLoggerHandler();
+      runAfter(loggerHandler::close);
+
+      setupServer(0, isFileStorage(), isNetty());
+      setupServer(1, isFileStorage(), isNetty());
+      setupServer(2, isFileStorage(), isNetty());
+
+      setupClusterConnection("cluster0", "", lbType, 1, isNetty(), 0, 1, 2);
+      setupClusterConnection("cluster0", "", lbType, 1, isNetty(), 1, 2, 0);
+      setupClusterConnection("cluster0", "", lbType, 1, isNetty(), 2, 0, 1);
+
+      startServers(0, 1, 2);
+
+      AddressSettings as = new AddressSettings().setRedistributionDelay(0);
+      servers[0].getAddressSettingsRepository().addMatch(namePrefix + "#", as);
+      servers[1].getAddressSettingsRepository().addMatch(namePrefix + "#", as);
+      servers[2].getAddressSettingsRepository().addMatch(namePrefix + "#", as);
+
+      waitForTopology(servers[2], 3);
+
+      ExecutorService executorService = Executors.newCachedThreadPool();
+      CountDownLatch latch = new CountDownLatch(queueCount * 2);
+
+      try (ActiveMQConnectionFactory factory = new 
ActiveMQConnectionFactory("tcp://localhost:61616")) {
+
+         List<DefaultMessageListenerContainer> containers = new ArrayList<>();
+         runAfter(() -> 
containers.parallelStream().forEach(AbstractJmsListeningContainer::shutdown));
+         runAfter(() -> executorService.shutdown());
+
+         for (int i = 0; i < queueCount; i++) {
+            Queue queue = ActiveMQDestination.createQueue(namePrefix + i + 
"-");
+
+            executorService.submit(() -> {
+               try (Connection connection = factory.createConnection();
+                    Session session = 
connection.createSession(Session.SESSION_TRANSACTED)) {
+
+                  
session.createProducer(queue).send(session.createTextMessage("Message"));
+                  session.commit();
+                  latch.countDown();
+               } catch (Exception e) { }
+            });
+
+            DefaultMessageListenerContainer container = new 
DefaultMessageListenerContainer();
+            container.setCacheLevelName("CACHE_NONE");
+            container.setSessionTransacted(true);
+            container.setSessionAcknowledgeModeName("SESSION_TRANSACTED");
+            container.setConcurrentConsumers(20);
+            container.setConnectionFactory(new 
CachingConnectionFactory(factory));
+            container.setDestinationName(queue.getQueueName());
+            container.setBackOff(new FixedBackOff(1000, 2));
+            container.setReceiveTimeout(100);
+            container.setMessageListener((MessageListener) msg -> {
+               latch.countDown();
+            });
+
+            container.initialize();

Review Comment:
   This test is always failing for me:
   
   
   ```
   
   java.lang.OutOfMemoryError: unable to create native thread: possibly out of 
memory or process/resource limits reached
   
        at java.base/java.lang.Thread.start0(Native Method)
        at java.base/java.lang.Thread.start(Thread.java:802)
        at 
org.springframework.core.task.SimpleAsyncTaskExecutor.doExecute(SimpleAsyncTaskExecutor.java:248)
        at 
org.springframework.core.task.SimpleAsyncTaskExecutor.execute(SimpleAsyncTaskExecutor.java:202)
        at 
org.springframework.core.task.SimpleAsyncTaskExecutor.execute(SimpleAsyncTaskExecutor.java:180)
        at 
org.springframework.jms.listener.DefaultMessageListenerContainer.doRescheduleTask(DefaultMessageListenerContainer.java:780)
        at 
org.springframework.jms.listener.AbstractJmsListeningContainer.resumePausedTasks(AbstractJmsListeningContainer.java:545)
        at 
org.springframework.jms.listener.AbstractJmsListeningContainer.doStart(AbstractJmsListeningContainer.java:299)
        at 
org.springframework.jms.listener.AbstractJmsListeningContainer.start(AbstractJmsListeningContainer.java:277)
        at 
org.springframework.jms.listener.DefaultMessageListenerContainer.start(DefaultMessageListenerContainer.java:657)
        at 
org.apache.activemq.artemis.tests.integration.cluster.distribution.ClusterNotificationsTest.testClusterNotificationsContinuity(ClusterNotificationsTest.java:110)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
        at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
        at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
        at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
        at 
org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
        at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
        at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
        at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
        at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
        at 
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
        at 
com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
        at 
com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
        at 
com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
        at 
com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:232)
        at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:55)
   
   ```
   
   
   Can we do this test without spring though? it gets easier to debug tests. 
I'm not aware of any other tests actually using spring for consuming messages 
and asserting.
   
   
   I reckon it removes a lot of boilerplate code from the consumer.. but I 
would prefer having more control on what's going on... 
   
   
   like now: the tests Is failing with lack of threads and I have no idea how 
to fix it.



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