Make jmsListenerContainerFactory @ConditionalOnSingleCandidate

Closes gh-12700

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jms/JmsAnnotationDrivenConfiguration.java

@@ -22,6 +22,7 @@ import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnJndi;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnSingleCandidate;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.jms.annotation.EnableJms;
@@ -73,6 +74,7 @@ class JmsAnnotationDrivenConfiguration {
 	}
 
 	@Bean
+	@ConditionalOnSingleCandidate(ConnectionFactory.class)
 	@ConditionalOnMissingBean(name = "jmsListenerContainerFactory")
 	public DefaultJmsListenerContainerFactory jmsListenerContainerFactory(
 			DefaultJmsListenerContainerFactoryConfigurer configurer,

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jms/JmsAutoConfigurationTests.java

@@ -149,6 +149,13 @@ public class JmsAutoConfigurationTests {
 										SimpleJmsListenerContainerFactory.class));
 	}
 
+	@Test
+	public void jmsListenerContainerFactoryWhenMultipleConnectionFactoryBeansShouldBackOff() {
+		this.contextRunner.withUserConfiguration(TestConfiguration10.class)
+				.run((context) -> assertThat(context)
+						.doesNotHaveBean(JmsListenerContainerFactory.class));
+	}
+
 	@Test
 	public void testJmsListenerContainerFactoryWithCustomSettings() {
 		this.contextRunner.withUserConfiguration(EnableJmsConfiguration.class)
@@ -572,6 +579,21 @@ public class JmsAutoConfigurationTests {
 
 	}
 
+	@Configuration
+	protected static class TestConfiguration10 {
+
+		@Bean
+		public ConnectionFactory connectionFactory1() {
+			return new ActiveMQConnectionFactory();
+		}
+
+		@Bean
+		public ConnectionFactory connectionFactory2() {
+			return new ActiveMQConnectionFactory();
+		}
+
+	}
+
 	@Configuration
 	@EnableJms
 	protected static class EnableJmsConfiguration {