ARTEMIS-5037: option to limit mirror propagation

Add a new option in the Mirror settings to prevent a broker from
propagating messages.

When working with a topology where 4 nodes are forming a square and
where each node in that square mirrors its two neighbors: a message
leaving a corner can reach the opposite corner of the square by two
different routes. This is causing the message ordering to get broken.

example:
1 <-> 2
^     ^
|     |
v     v
4 <-> 3

A message from 1 will reach 3 by 2 and 4. Message duplication checks
will prevent the message from being duplicated but won't help regarding
the order of the messages. This is because a either the route by 2 or 4
can be faster than the other, so whomever wins the race sets the message
first.

Fixing the example:
Using the new option to not forward messages coming from a link, we
break the possibilities to have two routes to reach the opposite corner.

The above example is updated as followed:
* 2 never forwards messages coming from 1
* 1 never forwards messages coming from 2
* 3 never forwards messages coming from 4
* 4 never forwards messages coming from 3

Now, when a messages leaves 1:
* it reaches 2 and stops there
* it reaches 4
* it reaches 3 through 4 and stops there

Now, when a messages leaves 2:
* it reaches 1 and stops there
* it reaches 3
* it reaches 4 through 3 and stops there

Now, when a messages leaves 3:
* it reaches 4 and stops there
* it reaches 2
* it reaches 1 through 2 and stops there

Now, when a messages leaves 4:
* it reaches 3 and stops there
* it reaches 1
* it reaches 2 through 1 and stops there

The new test AMQPSquareMirroringTest.java is testing this exact setup.

Author: lavocatt

artemis-protocols/artemis-amqp-protocol/src/main/java/org/apache/activemq/artemis/protocol/amqp/connect/AMQPBrokerConnection.java

@@ -17,6 +17,7 @@
 package org.apache.activemq.artemis.protocol.amqp.connect;
 
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
@@ -430,15 +431,18 @@ private void doConnect() {
                   final Queue queue = server.locateQueue(getMirrorSNF(replica));
 
                   final boolean coreTunnelingEnabled = isCoreMessageTunnelingEnabled(replica);
-                  final Symbol[] desiredCapabilities;
 
+                  ArrayList<Symbol> desiredCapabilitiesList = new ArrayList<>();
+                  desiredCapabilitiesList.add(AMQPMirrorControllerSource.MIRROR_CAPABILITY);
                   if (coreTunnelingEnabled) {
-                     desiredCapabilities = new Symbol[] {AMQPMirrorControllerSource.MIRROR_CAPABILITY,
-                                                         AmqpSupport.CORE_MESSAGE_TUNNELING_SUPPORT};
-                  } else {
-                     desiredCapabilities = new Symbol[] {AMQPMirrorControllerSource.MIRROR_CAPABILITY};
+                     desiredCapabilitiesList.add(AmqpSupport.CORE_MESSAGE_TUNNELING_SUPPORT);
+                  }
+                  if (!replica.getCanForwardMessages()) {
+                     desiredCapabilitiesList.add(AMQPMirrorControllerSource.NO_FORWARD);
                   }
 
+                  final Symbol[] desiredCapabilities = (Symbol[]) desiredCapabilitiesList.toArray(new Symbol[]{});
+
                   final Symbol[] requiredOfferedCapabilities = new Symbol[] {AMQPMirrorControllerSource.MIRROR_CAPABILITY};
 
                   connectSender(queue,
@@ -447,7 +451,7 @@ private void doConnect() {
                                 (r) -> AMQPMirrorControllerSource.validateProtocolData(protonProtocolManager.getReferenceIDSupplier(), r, getMirrorSNF(replica)),
                                 server.getNodeID().toString(),
                                 desiredCapabilities,
-                                null,
+                                replica.getCanForwardMessages() ? null : new Symbol[] {AMQPMirrorControllerSource.NO_FORWARD},
                                 requiredOfferedCapabilities);
                } else if (connectionElement.getType() == AMQPBrokerConnectionAddressType.FEDERATION) {
                   // Starting the Federation triggers rebuild of federation links

artemis-protocols/artemis-amqp-protocol/src/main/java/org/apache/activemq/artemis/protocol/amqp/connect/mirror/AMQPMirrorControllerSource.java

@@ -89,9 +89,11 @@ public class AMQPMirrorControllerSource extends BasicMirrorController<Sender> im
    // Capabilities
    public static final Symbol MIRROR_CAPABILITY = Symbol.getSymbol("amq.mirror");
    public static final Symbol QPID_DISPATCH_WAYPOINT_CAPABILITY = Symbol.valueOf("qd.waypoint");
+   public static final Symbol NO_FORWARD = Symbol.getSymbol("amq.no.forward");
 
    public static final SimpleString INTERNAL_ID_EXTRA_PROPERTY = SimpleString.of(INTERNAL_ID.toString());
    public static final SimpleString INTERNAL_BROKER_ID_EXTRA_PROPERTY = SimpleString.of(BROKER_ID.toString());
+   public static final SimpleString INTERNAL_NO_FORWARD = SimpleString.of(NO_FORWARD.toString());
 
    private static final ThreadLocal<RoutingContext> mirrorControlRouting = ThreadLocal.withInitial(() -> new RoutingContextImpl(null));
 
@@ -301,6 +303,10 @@ private boolean invalidTarget(MirrorController controller) {
       return controller != null && sameNode(getRemoteMirrorId(), controller.getRemoteMirrorId());
    }
 
+   private boolean isBlockedByNoForward(Message message) {
+      return Boolean.TRUE.equals(message.getBrokerProperty(INTERNAL_NO_FORWARD));
+   }
+
    private boolean ignoreAddress(SimpleString address) {
       if (address.startsWith(server.getConfiguration().getManagementAddress())) {
          return true;
@@ -344,6 +350,11 @@ public void sendMessage(Transaction tx, Message message, RoutingContext context)
          return;
       }
 
+      if (isBlockedByNoForward(message)) {
+         logger.trace("sendMessage::server {} is discarding the message because its source is setting a noForward policy", server);
+         return;
+      }
+
       logger.trace("sendMessage::{} send message {}", server, message);
 
       try {

artemis-protocols/artemis-amqp-protocol/src/main/java/org/apache/activemq/artemis/protocol/amqp/connect/mirror/AMQPMirrorControllerTarget.java

@@ -57,6 +57,7 @@
 import org.apache.activemq.artemis.protocol.amqp.proton.ProtonAbstractReceiver;
 import org.apache.activemq.artemis.utils.ByteUtil;
 import org.apache.activemq.artemis.utils.pools.MpscPool;
+import org.apache.qpid.proton.amqp.Symbol;
 import org.apache.qpid.proton.amqp.messaging.Accepted;
 import org.apache.qpid.proton.amqp.messaging.AmqpValue;
 import org.apache.qpid.proton.amqp.messaging.DeliveryAnnotations;
@@ -77,8 +78,10 @@
 import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.DELETE_QUEUE;
 import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.EVENT_TYPE;
 import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.INTERNAL_BROKER_ID_EXTRA_PROPERTY;
+import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.NO_FORWARD;
 import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.INTERNAL_DESTINATION;
 import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.INTERNAL_ID;
+import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.INTERNAL_NO_FORWARD;
 import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.POST_ACK;
 import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.QUEUE;
 import static org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerSource.INTERNAL_ID_EXTRA_PROPERTY;
@@ -92,6 +95,8 @@ public class AMQPMirrorControllerTarget extends ProtonAbstractReceiver implement
 
    private static final ThreadLocal<MirrorController> CONTROLLER_THREAD_LOCAL = new ThreadLocal<>();
 
+   private boolean noMessageForwarding = false;
+
    public static void setControllerInUse(MirrorController controller) {
       CONTROLLER_THREAD_LOCAL.set(controller);
    }
@@ -248,6 +253,13 @@ public AMQPMirrorControllerTarget(AMQPSessionCallback sessionSPI,
       this.configuration = server.getConfiguration();
       this.referenceNodeStore = sessionSPI.getProtocolManager().getReferenceIDSupplier();
       mirrorContext = protonSession.getSessionSPI().getSessionContext();
+      if (receiver.getRemoteDesiredCapabilities() != null) {
+         for (Symbol capability : receiver.getRemoteDesiredCapabilities()) {
+            if (capability == NO_FORWARD) {
+               this.noMessageForwarding = true;
+            }
+         }
+      }
    }
 
    @Override
@@ -534,6 +546,9 @@ private boolean sendMessage(Message message, DeliveryAnnotations deliveryAnnotat
 
       message.setBrokerProperty(INTERNAL_ID_EXTRA_PROPERTY, internalID);
       message.setBrokerProperty(INTERNAL_BROKER_ID_EXTRA_PROPERTY, internalMirrorID);
+      if (this.noMessageForwarding) {
+         message.setBrokerProperty(INTERNAL_NO_FORWARD, true);
+      }
 
       if (internalAddress != null) {
          message.setAddress(internalAddress);
@@ -590,4 +605,4 @@ public void sendMessage(Transaction tx, Message message, RoutingContext context)
       // Do nothing
    }
 
-}
+}

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

@@ -30,6 +30,8 @@ public class AMQPMirrorBrokerConnectionElement extends AMQPBrokerConnectionEleme
 
    boolean queueCreation = true;
 
+   boolean canForwardMessages = true;
+
    boolean queueRemoval = true;
 
    boolean messageAcknowledgements = true;
@@ -75,6 +77,15 @@ public AMQPMirrorBrokerConnectionElement setQueueCreation(boolean queueCreation)
       return this;
    }
 
+   public boolean getCanForwardMessages() {
+      return canForwardMessages;
+   }
+
+   public AMQPMirrorBrokerConnectionElement setCanForwardMessages(boolean canForwardMessages) {
+      this.canForwardMessages = canForwardMessages;
+      return this;
+   }
+
    public boolean isQueueRemoval() {
       return queueRemoval;
    }

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

@@ -2191,10 +2191,11 @@ private void parseAMQPBrokerConnections(final Element e,
                boolean durable = getBooleanAttribute(e2, "durable", true);
                boolean queueRemoval = getBooleanAttribute(e2, "queue-removal", true);
                boolean sync = getBooleanAttribute(e2, "sync", false);
+               boolean canForwardMessages = !getBooleanAttribute(e2, "no-messages-forwarding", false);
                String addressFilter = getAttributeValue(e2, "address-filter");
 
                AMQPMirrorBrokerConnectionElement amqpMirrorConnectionElement = new AMQPMirrorBrokerConnectionElement();
-               amqpMirrorConnectionElement.setMessageAcknowledgements(messageAcks).setQueueCreation(queueCreation).setQueueRemoval(queueRemoval).setDurable(durable).setAddressFilter(addressFilter).setSync(sync);
+               amqpMirrorConnectionElement.setMessageAcknowledgements(messageAcks).setQueueCreation(queueCreation).setQueueRemoval(queueRemoval).setDurable(durable).setAddressFilter(addressFilter).setSync(sync).setCanForwardMessages(canForwardMessages);
                connectionElement = amqpMirrorConnectionElement;
                connectionElement.setType(AMQPBrokerConnectionAddressType.MIRROR);
 

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

@@ -2290,6 +2290,14 @@
             </xsd:documentation>
          </xsd:annotation>
       </xsd:attribute>
+      <xsd:attribute name="no-message-forwarding" type="xsd:boolean" use="optional" default="false">
+         <xsd:annotation>
+            <xsd:documentation>
+               If this is true, the mirror at the opposite end of the link will not forward messages coming from that link to any other mirrors down the line.
+               This is false by default.
+            </xsd:documentation>
+         </xsd:annotation>
+      </xsd:attribute>
       <xsd:attribute name="address-filter" type="xsd:string" use="optional">
          <xsd:annotation>
             <xsd:documentation>