Properly handle InvalidEndpointRequestException

This commit makes sure that `InvalidEndpointRequestException` is wrapped
in a `ReflectionException` when invoked via JMX.

Closes gh-12857

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/jmx/EndpointMBean.java

@@ -93,27 +93,22 @@ public class EndpointMBean implements DynamicMBean {
 		return invoke(operation, params);
 	}
 
-	private Object invoke(JmxOperation operation, Object[] params) throws MBeanException {
+	private Object invoke(JmxOperation operation, Object[] params)
+			throws MBeanException, ReflectionException {
 		try {
 			String[] parameterNames = operation.getParameters().stream()
 					.map(JmxOperationParameter::getName).toArray(String[]::new);
 			Map<String, Object> arguments = getArguments(parameterNames, params);
-			Object result = invokeOperation(operation, arguments);
+			Object result = operation
+					.invoke(new InvocationContext(SecurityContext.NONE, arguments));
 			if (REACTOR_PRESENT) {
 				result = ReactiveHandler.handle(result);
 			}
 			return this.responseMapper.mapResponse(result);
 		}
 		catch (InvalidEndpointRequestException ex) {
-			throw new IllegalArgumentException(ex.getMessage(), ex);
-		}
-	}
-
-	private Object invokeOperation(JmxOperation operation,
-			Map<String, Object> arguments) throws MBeanException {
-		try {
-			return operation.invoke(new InvocationContext(SecurityContext.NONE,
-					arguments));
+			throw new ReflectionException(new IllegalArgumentException(
+					ex.getMessage()), ex.getMessage());
 		}
 		catch (Exception ex) {
 			throw new MBeanException(translateIfNecessary(ex), ex.getMessage());

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/jmx/EndpointMBeanTests.java

@@ -30,6 +30,8 @@ import org.junit.rules.ExpectedException;
 import reactor.core.publisher.Mono;
 
 import org.springframework.beans.FatalBeanException;
+import org.springframework.boot.actuate.endpoint.InvalidEndpointRequestException;
+import org.springframework.boot.actuate.endpoint.InvocationContext;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.hamcrest.CoreMatchers.instanceOf;
@@ -124,6 +126,23 @@ public class EndpointMBeanTests {
 		bean.invoke("missingOperation", NO_PARAMS, NO_SIGNATURE);
 	}
 
+	@Test
+	public void invokeWhenOperationIsInvalidShouldThrowException()
+			throws MBeanException, ReflectionException {
+		TestJmxOperation operation = new TestJmxOperation() {
+			@Override
+			public Object invoke(InvocationContext context) {
+				throw new InvalidEndpointRequestException("test failure", "test");
+			}
+		};
+		TestExposableJmxEndpoint endpoint = new TestExposableJmxEndpoint(operation);
+		EndpointMBean bean = new EndpointMBean(this.responseMapper, endpoint);
+		this.thrown.expect(ReflectionException.class);
+		this.thrown.expectCause(instanceOf(IllegalArgumentException.class));
+		this.thrown.expectMessage("test failure");
+		bean.invoke("testOperation", NO_PARAMS, NO_SIGNATURE);
+	}
+
 	@Test
 	public void invokeWhenMonoResultShouldBlockOnMono()
 			throws MBeanException, ReflectionException {