AMQ-9420 - Don't decrement KahaDB durable sub metrics on duplicate ack

This adds a check in case a duplicate ack is passed to the store to make
sure that the subscription statistics (if enabled) for a durable sub do
not have the metrics decremented a second time

activemq-kahadb-store/src/main/java/org/apache/activemq/store/kahadb/MessageDatabase.java

@@ -1545,8 +1545,9 @@ public abstract class MessageDatabase extends ServiceSupport implements BrokerSe
         if (previous == null) {
             previous = sd.messageIdIndex.put(tx, command.getMessageId(), id);
             if (previous == null) {
-                incrementAndAddSizeToStoreStat(tx, command.getDestination(), location.getSize());
                 sd.orderIndex.put(tx, priority, id, new MessageKeys(command.getMessageId(), location));
+                // increment after putting into the order index first
+                incrementAndAddSizeToStoreStat(tx, command.getDestination(), location.getSize());
                 if (sd.subscriptions != null && !sd.subscriptions.isEmpty(tx)) {
                     addAckLocationForNewMessage(tx, command.getDestination(), sd, id);
                 }
@@ -3148,18 +3149,30 @@ public abstract class MessageDatabase extends ServiceSupport implements BrokerSe
         if (messageSequence != null) {
             SequenceSet range = sd.ackPositions.get(tx, subscriptionKey);
             if (range != null && !range.isEmpty()) {
-                range.remove(messageSequence);
+                boolean removed = range.remove(messageSequence);
                 if (!range.isEmpty()) {
                     sd.ackPositions.put(tx, subscriptionKey, range);
                 } else {
                     sd.ackPositions.remove(tx, subscriptionKey);
                 }
 
-                MessageKeys key = sd.orderIndex.get(tx, messageSequence);
+                // Only decrement the statistics if the message was removed
-                decrementAndSubSizeToStoreStat(command.getDestination(), subscriptionKey,
+                // from the ack set for the subscription
+                // Fix for AMQ-9420
+                if (removed) {
+                    MessageKeys key = sd.orderIndex.get(tx, messageSequence);
+                    decrementAndSubSizeToStoreStat(command.getDestination(), subscriptionKey,
                         key.location.getSize());
+                } else {
+                    LOG.warn("Received unexpected duplicate ack: messageId: {}, Sub: {}, Dest: {}",
+                        command.getMessageId(), subscriptionKey, command.getDestination());
+                }
 
                 // Check if the message is reference by any other subscription.
+                // If removed was previously false then we could return before
+                // this check as this should always return true (should still be
+                // a reference) but removed being false is unexpected in the first
+                // place so this is a good second check to verify.
                 if (isSequenceReferenced(tx, sd, messageSequence)) {
                     return;
                 }

activemq-unit-tests/src/test/java/org/apache/activemq/broker/region/cursors/AbstractPendingMessageCursorTest.java

@@ -533,7 +533,7 @@ public abstract class AbstractPendingMessageCursorTest extends AbstractStoreStat
 
         return publishTestMessagesDurable(connection, subNames, defaultTopicName,
                 publishSize, 0, AbstractStoreStatTestSupport.defaultMessageSize,
-                publishedMessageSize, false, deliveryMode);
+                publishedMessageSize, null, false, deliveryMode);
     }
 
     protected org.apache.activemq.broker.region.Topic publishTestTopicMessages(int publishSize,

activemq-unit-tests/src/test/java/org/apache/activemq/store/AbstractMessageStoreSizeStatTest.java

@@ -18,19 +18,22 @@ package org.apache.activemq.store;
 
 import static org.junit.Assert.assertTrue;
 
-import java.io.IOException;
-import java.net.URI;
-import java.util.concurrent.atomic.AtomicLong;
-
 import jakarta.jms.Connection;
 import jakarta.jms.DeliveryMode;
-
+import java.io.IOException;
+import java.net.URI;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicLong;
 import org.apache.activemq.ActiveMQConnectionFactory;
 import org.apache.activemq.broker.BrokerService;
 import org.apache.activemq.broker.TransportConnector;
 import org.apache.activemq.broker.region.Destination;
+import org.apache.activemq.broker.region.Topic;
+import org.apache.activemq.command.ActiveMQTopic;
+import org.apache.activemq.command.MessageAck;
+import org.apache.activemq.command.MessageId;
 import org.apache.activemq.util.Wait;
-import org.apache.activemq.util.Wait.Condition;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -47,11 +50,20 @@ public abstract class AbstractMessageStoreSizeStatTest extends AbstractStoreStat
     protected static final Logger LOG = LoggerFactory
             .getLogger(AbstractMessageStoreSizeStatTest.class);
 
-
     protected BrokerService broker;
     protected URI brokerConnectURI;
     protected String defaultQueueName = "test.queue";
     protected String defaultTopicName = "test.topic";
+    // Only applies to KahaDB
+    protected final boolean subStatsEnabled;
+
+    protected AbstractMessageStoreSizeStatTest(boolean subStatsEnabled) {
+        this.subStatsEnabled = subStatsEnabled;
+    }
+
+    protected AbstractMessageStoreSizeStatTest() {
+        this.subStatsEnabled = false;
+    }
 
     @Before
     public void startBroker() throws Exception {
@@ -119,17 +131,40 @@ public abstract class AbstractMessageStoreSizeStatTest extends AbstractStoreStat
         connection.setClientID("clientId");
         connection.start();
 
-        Destination dest = publishTestMessagesDurable(connection, new String[] {"sub1"}, 200, 200, publishedMessageSize);
+        ActiveMQTopic topic = new ActiveMQTopic(defaultTopicName);
+        Set<String> publishedMessages = new HashSet<>();
+        Topic dest = publishTestMessagesDurable(connection, new String[] {"sub1"}, 200, 200,
+            publishedMessageSize, publishedMessages);
+
+        PersistenceAdapter adapter = this.broker.getPersistenceAdapter();
+        TopicMessageStore store = adapter.createTopicMessageStore(topic);
 
         //verify the count and size
         verifyStats(dest, 200, publishedMessageSize.get());
 
+        if (subStatsEnabled) {
+            verifyDurableStats(dest, "clientId:sub1", 200, publishedMessageSize.get());
+        }
+
         //consume all messages
         consumeDurableTestMessages(connection, "sub1", 200, publishedMessageSize);
 
         //All messages should now be gone
         verifyStats(dest, 0, 0);
 
+        if (subStatsEnabled) {
+            verifyDurableStats(dest, "clientId:sub1", 0, publishedMessageSize.get());
+        }
+
+        // Send 10 duplicates to verify our metrics are not broken
+        sendAcks(store, publishedMessages);
+
+        // Stats should still show 0 after duplicates
+        verifyStats(dest, 0, publishedMessageSize.get());
+        if (subStatsEnabled) {
+            verifyDurableStats(dest, "clientId:sub1", 0, publishedMessageSize.get());
+        }
+
         connection.close();
     }
 
@@ -140,17 +175,46 @@ public abstract class AbstractMessageStoreSizeStatTest extends AbstractStoreStat
         connection.setClientID("clientId");
         connection.start();
 
-        Destination dest = publishTestMessagesDurable(connection, new String[] {"sub1", "sub2"}, 200, 200, publishedMessageSize);
+        ActiveMQTopic topic = new ActiveMQTopic(defaultTopicName);
+        Set<String> publishedMessages = new HashSet<>();
+        Topic dest = publishTestMessagesDurable(connection, new String[] {"sub1", "sub2"}, 200, 200,
+            publishedMessageSize, publishedMessages);
+
+        PersistenceAdapter adapter = this.broker.getPersistenceAdapter();
+        TopicMessageStore store = adapter.createTopicMessageStore(topic);
 
         //verify the count and size
         verifyStats(dest, 200, publishedMessageSize.get());
 
+        // Verify each subscription counter is correct
+        if (subStatsEnabled) {
+            verifyDurableStats(dest, "clientId:sub1", 200, publishedMessageSize.get());
+            verifyDurableStats(dest, "clientId:sub2", 200, publishedMessageSize.get());
+        }
+
         //consume messages just for sub1
         consumeDurableTestMessages(connection, "sub1", 200, publishedMessageSize);
 
         //There is still a durable that hasn't consumed so the messages should exist
         verifyStats(dest, 200, publishedMessageSize.get());
+        if (subStatsEnabled) {
+            verifyDurableStats(dest, "clientId:sub1", 0, publishedMessageSize.get());
+            verifyDurableStats(dest, "clientId:sub2", 200, publishedMessageSize.get());
+        }
 
+        // Send 10 duplicates to verify our metrics are not broken
+        // This used to break in memory subscription statistics before AMQ-9420
+        sendAcks(store, publishedMessages);
+
+        // Stats should still show 200 after duplicates
+        verifyStats(dest, 200, publishedMessageSize.get());
+
+        // Verify each subscription counter is correct
+        // Sub 2 should still have 200 messages
+        if (subStatsEnabled) {
+            verifyDurableStats(dest, "clientId:sub1", 0, publishedMessageSize.get());
+            verifyDurableStats(dest, "clientId:sub2", 200, publishedMessageSize.get());
+        }
         connection.stop();
 
     }
@@ -179,30 +243,30 @@ public abstract class AbstractMessageStoreSizeStatTest extends AbstractStoreStat
         final MessageStore messageStore = dest.getMessageStore();
         final MessageStoreStatistics storeStats = dest.getMessageStore().getMessageStoreStatistics();
 
-        assertTrue(Wait.waitFor(new Condition() {
+        assertTrue(Wait.waitFor(
-            @Override
+            () -> (count == messageStore.getMessageCount()) && (messageStore.getMessageCount() ==
-            public boolean isSatisified() throws Exception {
+                    storeStats.getMessageCount().getCount()) && (messageStore.getMessageSize() ==
-                return (count == messageStore.getMessageCount()) && (messageStore.getMessageCount() ==
+            messageStore.getMessageStoreStatistics().getMessageSize().getTotalSize())));
-                        storeStats.getMessageCount().getCount()) && (messageStore.getMessageSize() ==
-                messageStore.getMessageStoreStatistics().getMessageSize().getTotalSize());
-            }
-        }));
 
         if (count > 0) {
             assertTrue(storeStats.getMessageSize().getTotalSize() > minimumSize);
-            assertTrue(Wait.waitFor(new Condition() {
+            assertTrue(Wait.waitFor(() -> storeStats.getMessageSize().getTotalSize() > minimumSize));
-                @Override
-                public boolean isSatisified() throws Exception {
-                    return storeStats.getMessageSize().getTotalSize() > minimumSize;
-                }
-            }));
         } else {
-            assertTrue(Wait.waitFor(new Condition() {
+            assertTrue(Wait.waitFor(() -> storeStats.getMessageSize().getTotalSize() == 0));
-                @Override
+        }
-                public boolean isSatisified() throws Exception {
+    }
-                    return storeStats.getMessageSize().getTotalSize() == 0;
+
-                }
+    protected void verifyDurableStats(Topic dest, String subKey, final int count, final long minimumSize) throws Exception {
-            }));
+        final TopicMessageStore messageStore = (TopicMessageStore) dest.getMessageStore();
+        MessageStoreSubscriptionStatistics subStats = messageStore.getMessageStoreSubStatistics();
+
+        assertTrue(Wait.waitFor(
+            () -> count == subStats.getMessageCount(subKey).getCount()));
+
+        if (count > 0) {
+            assertTrue(subStats.getMessageSize(subKey).getTotalSize() > minimumSize);
+        } else {
+            assertTrue(Wait.waitFor(() -> subStats.getMessageSize(subKey).getTotalSize() == 0));
         }
     }
 
@@ -226,11 +290,27 @@ public abstract class AbstractMessageStoreSizeStatTest extends AbstractStoreStat
         return consumeDurableTestMessages(connection, sub, size, defaultTopicName, publishedMessageSize);
     }
 
-    protected Destination publishTestMessagesDurable(Connection connection, String[] subNames,
+    protected Topic publishTestMessagesDurable(Connection connection, String[] subNames,
-            int publishSize, int expectedSize, AtomicLong publishedMessageSize) throws Exception {
+            int publishSize, int expectedSize, AtomicLong publishedMessageSize, Set<String> publishedMessages) throws Exception {
        return publishTestMessagesDurable(connection, subNames, defaultTopicName,
                 publishSize, expectedSize, AbstractStoreStatTestSupport.defaultMessageSize,
-                publishedMessageSize, true);
+                publishedMessageSize, publishedMessages, true);
+    }
+
+    protected void sendAcks(TopicMessageStore store, Set<String> publishedMessages) {
+        publishedMessages.stream().limit(10).forEach(id -> {
+            try {
+                MessageId messageId = new MessageId(id);
+                MessageAck ack = new MessageAck();
+                ack.setMessageID(messageId);
+                ack.setDestination(store.getDestination());
+                ack.setAckType(MessageAck.INDIVIDUAL_ACK_TYPE);
+                ack.setMessageCount(1);
+                store.acknowledge(broker.getAdminConnectionContext(), "clientId", "sub1", messageId, ack);
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        });
     }
 
 }

activemq-unit-tests/src/test/java/org/apache/activemq/store/AbstractStoreStatTestSupport.java

@@ -22,6 +22,7 @@ import static org.junit.Assert.assertNotNull;
 import java.net.URI;
 import java.util.Enumeration;
 import java.util.Random;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicLong;
 
 import jakarta.jms.BytesMessage;
@@ -189,14 +190,14 @@ public abstract class AbstractStoreStatTestSupport {
     }
 
     protected org.apache.activemq.broker.region.Topic publishTestMessagesDurable(Connection connection, String[] subNames, String topicName,
-            int publishSize, int expectedSize, int messageSize, AtomicLong publishedMessageSize,
+            int publishSize, int expectedSize, int messageSize, AtomicLong publishedMessageSize, Set<String> publishedMessages,
             boolean verifyBrowsing) throws Exception {
         return this.publishTestMessagesDurable(connection, subNames, topicName, publishSize, expectedSize, messageSize,
-                publishedMessageSize, verifyBrowsing, DeliveryMode.PERSISTENT);
+                publishedMessageSize, publishedMessages, verifyBrowsing, DeliveryMode.PERSISTENT);
     }
 
     protected org.apache.activemq.broker.region.Topic publishTestMessagesDurable(Connection connection, String[] subNames, String topicName,
-            int publishSize, int expectedSize, int messageSize, AtomicLong publishedMessageSize,
+            int publishSize, int expectedSize, int messageSize, AtomicLong publishedMessageSize, Set<String> publishedMessages,
             boolean verifyBrowsing, int deliveryMode) throws Exception {
         // create a new queue
         final ActiveMQDestination activeMqTopic = new ActiveMQTopic(
@@ -228,7 +229,11 @@ public abstract class AbstractStoreStatTestSupport {
             MessageProducer prod = session.createProducer(topic);
             prod.setDeliveryMode(deliveryMode);
             for (int i = 0; i < publishSize; i++) {
-                prod.send(createMessage(i, session, messageSize, publishedMessageSize));
+                Message message = createMessage(i, session, messageSize, publishedMessageSize);
+                prod.send(message);
+                if (publishedMessages != null) {
+                    publishedMessages.add(message.getJMSMessageID());
+                }
             }
 
             //verify the view has expected messages

activemq-unit-tests/src/test/java/org/apache/activemq/store/kahadb/KahaDBMessageStoreSizeStatTest.java

@@ -18,6 +18,8 @@ package org.apache.activemq.store.kahadb;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.concurrent.atomic.AtomicLong;
 
 import org.apache.activemq.broker.BrokerService;
@@ -27,6 +29,9 @@ import org.apache.commons.io.FileUtils;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -37,14 +42,29 @@ import org.slf4j.LoggerFactory;
  * AMQ-5748
  *
  */
+@RunWith(Parameterized.class)
 public class KahaDBMessageStoreSizeStatTest extends
         AbstractMessageStoreSizeStatTest {
     protected static final Logger LOG = LoggerFactory
             .getLogger(KahaDBMessageStoreSizeStatTest.class);
 
+    @Parameters(name = "subStatsEnabled={0}")
+    public static Collection<Object[]> data() {
+        return Arrays.asList(new Object[][] {
+            // Subscription stats on
+            {true},
+            // Subscription stats off
+            {false}
+        });
+    }
+
     @Rule
     public TemporaryFolder dataFileDir = new TemporaryFolder(new File("target"));
 
+    public KahaDBMessageStoreSizeStatTest(boolean subStatsEnabled) {
+        super(subStatsEnabled);
+    }
+
     @Override
     protected void setUpBroker(boolean clearDataDir) throws Exception {
         if (clearDataDir && dataFileDir.getRoot().exists())
@@ -57,6 +77,8 @@ public class KahaDBMessageStoreSizeStatTest extends
             throws IOException {
         broker.setPersistent(true);
         broker.setDataDirectoryFile(dataFileDir.getRoot());
+        KahaDBPersistenceAdapter adapter = (KahaDBPersistenceAdapter) broker.getPersistenceAdapter();
+        adapter.setEnableSubscriptionStatistics(subStatsEnabled);
     }
 
     /**

activemq-unit-tests/src/test/java/org/apache/activemq/store/kahadb/MultiKahaDBMessageStoreSizeStatTest.java

@@ -21,6 +21,8 @@ import static org.junit.Assert.assertTrue;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicLong;
 
@@ -31,6 +33,9 @@ import org.apache.commons.io.FileUtils;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -41,14 +46,29 @@ import org.slf4j.LoggerFactory;
  * AMQ-5748
  *
  */
+@RunWith(Parameterized.class)
 public class MultiKahaDBMessageStoreSizeStatTest extends
         AbstractMessageStoreSizeStatTest {
     protected static final Logger LOG = LoggerFactory
             .getLogger(MultiKahaDBMessageStoreSizeStatTest.class);
 
+    @Parameters(name = "subStatsEnabled={0}")
+    public static Collection<Object[]> data() {
+        return Arrays.asList(new Object[][] {
+            // Subscription stats on
+            {true},
+            // Subscription stats off
+            {false}
+        });
+    }
+
     @Rule
     public TemporaryFolder dataFileDir = new TemporaryFolder(new File("target"));
 
+    public MultiKahaDBMessageStoreSizeStatTest(boolean subStatsEnabled) {
+        super(subStatsEnabled);
+    }
+
     @Override
     protected void setUpBroker(boolean clearDataDir) throws Exception {
         if (clearDataDir && dataFileDir.getRoot().exists())
@@ -67,6 +87,7 @@ public class MultiKahaDBMessageStoreSizeStatTest extends
 
         KahaDBPersistenceAdapter kahaStore = new KahaDBPersistenceAdapter();
         kahaStore.setJournalMaxFileLength(1024 * 512);
+        kahaStore.setEnableSubscriptionStatistics(subStatsEnabled);
 
         //set up a store per destination
         FilteredKahaDBPersistenceAdapter filtered = new FilteredKahaDBPersistenceAdapter();

activemq-unit-tests/src/test/java/org/apache/activemq/store/memory/MemoryMessageStoreSizeStatTest.java

@@ -55,7 +55,8 @@ public class MemoryMessageStoreSizeStatTest extends AbstractMessageStoreSizeStat
 
         //The expected value is only 100 because for durables a LRUCache is being used
         //with a max size of 100
-        Destination dest = publishTestMessagesDurable(connection, new String[] {"sub1"}, 200, 100, publishedMessageSize);
+        Destination dest = publishTestMessagesDurable(connection, new String[] {"sub1"}, 200, 100,
+            publishedMessageSize, null);
 
         //verify the count and size, should be 100 because of the LRUCache
         //verify size is at least the minimum of 100 messages times 100 bytes
@@ -80,7 +81,8 @@ public class MemoryMessageStoreSizeStatTest extends AbstractMessageStoreSizeStat
 
         //The expected value is only 100 because for durables a LRUCache is being used
         //with a max size of 100, so only 100 messages are kept
-        Destination dest = publishTestMessagesDurable(connection, new String[] {"sub1", "sub2"}, 200, 100, publishedMessageSize);
+        Destination dest = publishTestMessagesDurable(connection, new String[] {"sub1", "sub2"}, 200, 100,
+            publishedMessageSize, null);
 
         //verify the count and size
         //verify size is at least the minimum of 100 messages times 100 bytes