AMQ-6959

Avoid creating a Throwable in case of non-trace logging

activemq-client/src/main/java/org/apache/activemq/ActiveMQSession.java

@@ -950,7 +950,9 @@ public class ActiveMQSession implements Session, QueueSession, TopicSession, Sta
 
                             @Override
                             public void afterRollback() throws Exception {
+                                if (LOG.isTraceEnabled()) {
                                     LOG.trace("rollback {}", ack, new Throwable("here"));
+                                }
                                 // ensure we don't filter this as a duplicate
                                 connection.rollbackDuplicate(ActiveMQSession.this, md.getMessage());