This closes #3145

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/ServiceRegistry.java

@@ -98,6 +98,8 @@ public interface ServiceRegistry {
 
    void addDivertTransformer(String name, Transformer transformer);
 
+   void removeDivertTransformer(String name);
+
    /**
     * Get an instance of org.apache.activemq.artemis.core.server.transformer.Transformer for a bridge
     *

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

@@ -2595,6 +2595,10 @@ public class ActiveMQServerImpl implements ActiveMQServer {
       }
 
       postOffice.removeBinding(name, null, true);
+
+      if (((DivertBinding)binding).getDivert().getTransformer() != null) {
+         getServiceRegistry().removeDivertTransformer(name.toString());
+      }
    }
 
    @Override

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

@@ -156,6 +156,11 @@ public class ServiceRegistryImpl implements ServiceRegistry {
       divertTransformers.put(name, transformer);
    }
 
+   @Override
+   public void removeDivertTransformer(String name) {
+      divertTransformers.remove(name);
+   }
+
    @Override
    public Transformer getDivertTransformer(String name, TransformerConfiguration transformerConfiguration) {
       Transformer transformer = divertTransformers.get(name);

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/divert/DivertTest.java

@@ -1461,5 +1461,8 @@ public class DivertTest extends ActiveMQTestBase {
       }
       assertNotNull(divert);
       assertEquals(transformer, divert.getTransformer());
+
+      server.destroyDivert(SimpleString.toSimpleString(DIVERT));
+      assertNull(serviceRegistry.getDivertTransformer(DIVERT, null));
    }
 }