gemmellr commented on code in PR #4363:
URL: https://github.com/apache/activemq-artemis/pull/4363#discussion_r1105752716


##########
tests/leak-tests/pom.xml:
##########
@@ -0,0 +1,369 @@
+<!--
+  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.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
http://maven.apache.org/maven-v4_0_0.xsd";>
+   <modelVersion>4.0.0</modelVersion>
+
+   <parent>
+      <groupId>org.apache.activemq.tests</groupId>
+      <artifactId>artemis-tests-pom</artifactId>
+      <version>2.29.0-SNAPSHOT</version>
+   </parent>
+
+   <artifactId>leak-tests</artifactId>
+   <packaging>jar</packaging>
+   <name>ActiveMQ Artemis Leak Tests</name>
+
+   <properties>
+      <activemq.basedir>${project.basedir}/../..</activemq.basedir>
+      <check-leak-version>0.6</check-leak-version>
+      <!-- whatever name you choose it has to match between the 
check-leak-maven-plugin install call and the JVM argument -->
+      <check-leak-deploy-name>checkleak.lib</check-leak-deploy-name>
+      <its-surefire-extra-args />
+   </properties>
+
+   <dependencies>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-quorum-ri</artifactId>
+         <version>${project.version}</version>
+         <scope>test</scope>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq.tests</groupId>
+         <artifactId>unit-tests</artifactId>
+         <version>${project.version}</version>
+         <scope>test</scope>
+         <type>test-jar</type>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-jms-client</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-jms-server</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-ra</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-cli</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-commons</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-spring-integration</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-journal</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-jdbc-store</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-amqp-protocol</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-stomp-protocol</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-openwire-protocol</artifactId>
+         <version>${project.version}</version>
+         <exclusions>
+            <exclusion>
+               <groupId>org.apache.geronimo.specs</groupId>
+               <artifactId>geronimo-jms_1.1_spec</artifactId>
+            </exclusion>
+         </exclusions>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-hornetq-protocol</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-core-client</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-server</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>activemq-artemis-native</artifactId>
+         <version>${activemq-artemis-native-version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-service-extensions</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq.tests</groupId>
+         <artifactId>artemis-test-support</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-junit</artifactId>
+         <version>${project.version}</version>
+         <scope>test</scope>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-unit-test-support</artifactId>
+         <version>${project.version}</version>
+         <scope>test</scope>
+      </dependency>
+      <dependency>
+         <groupId>org.hamcrest</groupId>
+         <artifactId>hamcrest</artifactId>
+         <version>${hamcrest.version}</version>
+         <scope>test</scope>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>activemq-client</artifactId>
+         <scope>test</scope>
+         <exclusions>
+            <exclusion>
+               <groupId>org.apache.geronimo.specs</groupId>
+               <artifactId>geronimo-jms_1.1_spec</artifactId>
+            </exclusion>
+            <exclusion>
+               <groupId>org.apache.geronimo.specs</groupId>
+               <artifactId>geronimo-j2ee-management_1.1_spec</artifactId>
+            </exclusion>
+         </exclusions>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-mqtt-protocol</artifactId>
+         <version>${project.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>org.fusesource.mqtt-client</groupId>
+         <artifactId>mqtt-client</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>org.eclipse.paho</groupId>
+         <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>org.eclipse.paho</groupId>
+         <artifactId>org.eclipse.paho.mqttv5.client</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>jakarta.resource</groupId>
+         <artifactId>jakarta.resource-api</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>jakarta.transaction</groupId>
+         <artifactId>jakarta.transaction-api</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>jakarta.jms</groupId>
+         <artifactId>jakarta.jms-api</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>jakarta.management.j2ee</groupId>
+         <artifactId>jakarta.management.j2ee-api</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>jakarta.annotation</groupId>
+         <artifactId>jakarta.annotation-api</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>io.netty</groupId>
+         <artifactId>netty-buffer</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>io.netty</groupId>
+         <artifactId>netty-codec-http</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>io.netty</groupId>
+         <artifactId>netty-codec-mqtt</artifactId>
+         <version>${netty.version}</version>
+      </dependency>
+      <dependency>
+         <groupId>io.netty</groupId>
+         <artifactId>netty-handler</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>io.netty</groupId>
+         <artifactId>netty-transport</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>junit</groupId>
+         <artifactId>junit</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.qpid</groupId>
+         <artifactId>qpid-jms-client</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.qpid</groupId>
+         <artifactId>proton-j</artifactId>
+      </dependency>
+      <!-- logging -->
+      <dependency>
+         <groupId>org.slf4j</groupId>
+         <artifactId>slf4j-api</artifactId>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.logging.log4j</groupId>
+         <artifactId>log4j-slf4j-impl</artifactId>
+         <scope>test</scope>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.activemq</groupId>
+         <artifactId>artemis-web</artifactId>
+         <version>${project.version}</version>
+         <scope>test</scope>
+      </dependency>
+      <dependency>
+         <groupId>io.github.check-leak</groupId>
+         <artifactId>core</artifactId>
+         <version>${check-leak-version}</version>
+      </dependency>
+
+
+      <!-- The johnzon-core and json-api contents are repackaged in -commons,
+           However maven can still need them during tests, which run against
+           the original -commons classes when built+run in the same reactor,
+           and not the jar containing the shaded bits. -->
+      <dependency>
+         <groupId>org.apache.johnzon</groupId>
+         <artifactId>johnzon-core</artifactId>
+         <scope>test</scope>
+      </dependency>
+      <dependency>
+         <groupId>jakarta.json</groupId>
+         <artifactId>jakarta.json-api</artifactId>
+         <scope>test</scope>
+      </dependency>
+
+      <dependency>
+         <groupId>org.mockito</groupId>
+         <artifactId>mockito-core</artifactId>
+         <scope>test</scope>
+      </dependency>
+
+   </dependencies>
+
+   <build>
+      <testResources>
+         <testResource>
+            <directory>src/test/resources</directory>
+            <filtering>true</filtering>
+         </testResource>
+      </testResources>
+      <plugins>
+         <plugin>
+            <!-- exposed through jitpack.io.

Review Comment:
   Not anymore so comment also needs updated



##########
tests/leak-tests/pom.xml:
##########
@@ -0,0 +1,488 @@
+<!--

Review Comment:
   Unresolving comment since the test jar is still being created. Plus the 
'entire pom is mostly unused stuff' aspect also still stands.



##########
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/QueueImpl.java:
##########
@@ -4220,11 +4222,13 @@ public QueueConfiguration getQueueConfiguration() {
 
    protected static class ConsumerHolder<T extends Consumer> implements 
PriorityAware {
 
-      ConsumerHolder(final T consumer) {
+      ConsumerHolder(final T consumer, QueueImpl queue) {

Review Comment:
   Odd to have one listed final and the other not.



##########
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/QueueConsumersImpl.java:
##########
@@ -86,11 +86,21 @@ public boolean add(T t) {
       return result;
    }
 
+   @Override
+   public void removed(T t) {
+      iterator.removed(t);
+   }
+
    @Override
    public boolean remove(T t) {
+      iterator.removed(t);
       boolean result = consumers.remove(t);
       if (result) {
          iterator.update(consumers.resettableIterator());
+         if (consumers.isEmpty()) {
+            // TODO: can I always reset?
+            reset();
+         }

Review Comment:
   Did you decide no?
   
   Calling the 'external' reset() method instead of iterator.reset() when 
everything else in the method uses the iterator and consumers objects directly 
seems a bit odd.



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