fix ignored exceptions

integration-tests/src/test/java/org/springframework/aop/framework/autoproxy/AdvisorAutoProxyCreatorIntegrationTests.java

@@ -158,8 +158,7 @@ void testRollbackRulesOnMethodPreventRollback() throws Exception {
 		try {
 			rb.echoException(new ServletException());
 		}
-		catch (ServletException ex) {
-
+		catch (ServletException ignored) {
 		}
 		assertThat(txMan.commits).as("Transaction counts match").isEqualTo(1);
 	}
@@ -272,7 +271,7 @@ public void before(Method method, Object[] args, Object target) throws Throwable
 					TransactionInterceptor.currentTransactionStatus();
 					throw new RuntimeException("Shouldn't have a transaction");
 				}
-				catch (NoTransactionException ex) {
+				catch (NoTransactionException ignored) {
 					// this is Ok
 				}
 			}

spring-aop/src/main/java/org/springframework/aop/aspectj/AspectJExpressionPointcut.java

@@ -453,9 +453,9 @@ private ShadowMatch getTargetShadowMatch(Method method, Class<?> targetClass) {
 							ClassUtils.toClassArray(ifcs), targetClass.getClassLoader());
 					targetMethod = ClassUtils.getMostSpecificMethod(targetMethod, compositeInterface);
 				}
-				catch (IllegalArgumentException ex) {
-					// Implemented interfaces probably expose conflicting method signatures...
-					// Proceed with original target method.
+				// Implemented interfaces probably expose conflicting method signatures...
+				// Proceed with original target method.
+				catch (IllegalArgumentException ignored) {
 				}
 			}
 		}
@@ -478,7 +478,7 @@ private ShadowMatch getShadowMatch(Method targetMethod, Method originalMethod) {
 					try {
 						shadowMatch = pointcutExpression.matchesMethodExecution(methodToMatch);
 					}
-					catch (ReflectionWorldException ex) {
+					catch (ReflectionWorldException ignored) {
 						// Failed to introspect target method, probably because it has been loaded
 						// in a special ClassLoader. Let's try the declaring ClassLoader instead...
 						try {
@@ -501,7 +501,7 @@ private ShadowMatch getShadowMatch(Method targetMethod, Method originalMethod) {
 						try {
 							shadowMatch = pointcutExpression.matchesMethodExecution(methodToMatch);
 						}
-						catch (ReflectionWorldException ex) {
+						catch (ReflectionWorldException ignored) {
 							// Could neither introspect the target class nor the proxy class ->
 							// let's try the original method's declaring class before we give up...
 							try {

spring-beans/src/main/java/org/springframework/beans/factory/annotation/BeanFactoryAnnotationUtils.java

@@ -208,8 +208,8 @@ public static boolean isQualifierMatch(
 					}
 				}
 			}
-			catch (NoSuchBeanDefinitionException ex) {
-				// Ignore - can't compare qualifiers for a manually registered singleton object
+			catch (NoSuchBeanDefinitionException ignored) {
+				// can't compare qualifiers for a manually registered singleton object
 			}
 		}
 		return false;

spring-context/src/main/java/org/springframework/context/support/PostProcessorRegistrationDelegate.java

@@ -523,8 +523,7 @@ private void resolveTypeStringValue(TypedStringValue typedStringValue) {
 			try {
 				typedStringValue.resolveTargetType(this.beanFactory.getBeanClassLoader());
 			}
-			catch (ClassNotFoundException ex) {
-				// ignore
+			catch (ClassNotFoundException ignored) {
 			}
 		}
 

spring-context/src/main/java/org/springframework/validation/beanvalidation/LocalValidatorFactoryBean.java

@@ -266,8 +266,8 @@ public void afterPropertiesSet() {
 				Method eclMethod = configuration.getClass().getMethod("externalClassLoader", ClassLoader.class);
 				ReflectionUtils.invokeMethod(eclMethod, configuration, this.applicationContext.getClassLoader());
 			}
-			catch (NoSuchMethodException ex) {
-				// Ignore - no Hibernate Validator 5.2+ or similar provider
+			catch (NoSuchMethodException ignored) {
+				// no Hibernate Validator 5.2+ or similar provider
 			}
 		}
 
@@ -417,8 +417,8 @@ public <T> T unwrap(@Nullable Class<T> type) {
 			try {
 				return super.unwrap(type);
 			}
-			catch (ValidationException ex) {
-				// Ignore - we'll try ValidatorFactory unwrapping next
+			catch (ValidationException ignored) {
+				// we'll try ValidatorFactory unwrapping next
 			}
 		}
 		if (this.validatorFactory != null) {

spring-context/src/test/java/org/springframework/aop/framework/AbstractAopProxyTests.java

@@ -233,8 +233,7 @@ void serializableTargetAndAdvice() throws Throwable {
 		try {
 			p2.echo(new IOException());
 		}
-		catch (IOException ex) {
-
+		catch (IOException ignored) {
 		}
 		assertThat(cta.getCalls()).isEqualTo(2);
 	}

spring-core-test/src/main/java/org/springframework/core/test/tools/CompileWithForkedClassLoaderClassLoader.java

@@ -84,8 +84,7 @@ protected Class<?> findClass(String name) throws ClassNotFoundException {
 			try (stream) {
 				return stream.readAllBytes();
 			}
-			catch (IOException ex) {
-				// ignore
+			catch (IOException ignored) {
 			}
 		}
 		return null;

spring-core/src/main/java/org/springframework/cglib/proxy/BridgeMethodResolver.java

@@ -73,7 +73,8 @@ public BridgeMethodResolver(Map declToBridge, ClassLoader classLoader) {
                 } finally {
                     is.close();
                 }
-            } catch (IOException ignored) {}
+            } catch (IOException ignored) {
+			}
         }
         return resolved;
     }

spring-core/src/main/java/org/springframework/cglib/proxy/MethodProxy.java

@@ -62,8 +62,8 @@ public static MethodProxy create(Class c1, Class c2, String desc, String name1,
 			try {
 				proxy.init();
 			}
-			catch (CodeGenerationException ex) {
-				// Ignore - to be retried when actually needed later on (possibly not at all)
+			catch (CodeGenerationException ignored) {
+				// to be retried when actually needed later on (possibly not at all)
 			}
 		}
 		// SPRING PATCH END

spring-core/src/main/java/org/springframework/core/io/support/SpringFactoriesLoader.java

@@ -438,8 +438,7 @@ private static class KotlinDelegate {
 					return constructor;
 				}
 			}
-			catch (UnsupportedOperationException ex) {
-				// ignore
+			catch (UnsupportedOperationException ignored) {
 			}
 			return null;
 		}

spring-core/src/main/java/org/springframework/util/FileCopyUtils.java

@@ -229,8 +229,7 @@ private static void close(Closeable closeable) {
 		try {
 			closeable.close();
 		}
-		catch (IOException ex) {
-			// ignore
+		catch (IOException ignored) {
 		}
 	}
 

spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/DefaultStompSession.java

@@ -526,8 +526,7 @@ private void resetConnection() {
 			try {
 				conn.close();
 			}
-			catch (Throwable ex) {
-				// ignore
+			catch (Throwable ignored) {
 			}
 		}
 	}

spring-oxm/src/main/java/org/springframework/oxm/jaxb/Jaxb2Marshaller.java

@@ -1000,8 +1000,7 @@ private String getHost(String elementNamespace, DataHandler dataHandler) {
 				URI uri = ResourceUtils.toURI(elementNamespace);
 				return uri.getHost();
 			}
-			catch (URISyntaxException ex) {
-				// ignore
+			catch (URISyntaxException ignored) {
 			}
 			return dataHandler.getName();
 		}

spring-r2dbc/src/test/java/org/springframework/r2dbc/connection/R2dbcTransactionManagerTests.java

@@ -710,8 +710,7 @@ public Mono<Void> afterCompletion(int status) {
 			try {
 				return Mono.fromRunnable(() -> doAfterCompletion(status));
 			}
-			catch (Throwable ex) {
-				// ignore
+			catch (Throwable ignored) {
 			}
 
 			return Mono.empty();

spring-test/src/main/java/org/springframework/mock/http/client/MockClientHttpResponse.java

@@ -100,8 +100,7 @@ public void close() {
 		try {
 			getBody().close();
 		}
-		catch (IOException ex) {
-			// ignore
+		catch (IOException ignored) {
 		}
 	}
 

spring-test/src/main/java/org/springframework/mock/web/MockHttpServletRequest.java

@@ -1129,8 +1129,7 @@ private long parseDateHeader(String name, String value) {
 			try {
 				return simpleDateFormat.parse(value).getTime();
 			}
-			catch (ParseException ex) {
-				// ignore
+			catch (ParseException ignored) {
 			}
 		}
 		throw new IllegalArgumentException("Cannot parse date value '" + value + "' for '" + name + "' header");

spring-web/src/main/java/org/springframework/http/HttpHeaders.java

@@ -1223,8 +1223,7 @@ public void setHost(@Nullable InetSocketAddress host) {
 			try {
 				port = Integer.parseInt(portString);
 			}
-			catch (NumberFormatException ex) {
-				// ignore
+			catch (NumberFormatException ignored) {
 			}
 		}
 

spring-web/src/main/java/org/springframework/http/client/HttpComponentsClientHttpResponse.java

@@ -89,8 +89,7 @@ public void close() {
 				this.httpResponse.close();
 			}
 		}
-		catch (IOException ex) {
-			// Ignore exception on close...
+		catch (IOException ignored) {
 		}
 	}
 

spring-web/src/main/java/org/springframework/http/client/ReactorClientHttpResponse.java

@@ -108,8 +108,7 @@ public void close() {
 			StreamUtils.drain(body);
 			body.close();
 		}
-		catch (IOException ex) {
-			// ignore
+		catch (IOException ignored) {
 		}
 	}
 

spring-web/src/main/java/org/springframework/http/client/reactive/HttpComponentsClientHttpResponse.java

@@ -119,8 +119,7 @@ else if (expiresAttribute != null) {
 				ZonedDateTime expiresDate = ZonedDateTime.parse(expiresAttribute, DateTimeFormatter.RFC_1123_DATE_TIME);
 				return Duration.between(ZonedDateTime.now(expiresDate.getZone()), expiresDate).toSeconds();
 			}
-			catch (DateTimeParseException ex) {
-				// ignore
+			catch (DateTimeParseException ignored) {
 			}
 		}
 		return -1;

spring-web/src/main/java/org/springframework/http/converter/ResourceHttpMessageConverter.java

@@ -158,20 +158,20 @@ protected void writeContent(Resource resource, HttpOutputMessage outputMessage)
 				in.transferTo(out);
 				out.flush();
 			}
-			catch (NullPointerException ex) {
-				// ignore, see SPR-13620
+			catch (NullPointerException ignored) {
+				// see SPR-13620
 			}
 			finally {
 				try {
 					in.close();
 				}
-				catch (Throwable ex) {
-					// ignore, see SPR-12999
+				catch (Throwable ignored) {
+					// see SPR-12999
 				}
 			}
 		}
-		catch (FileNotFoundException ex) {
-			// ignore, see SPR-12999
+		catch (FileNotFoundException ignored) {
+			// see SPR-12999
 		}
 	}
 

spring-web/src/main/java/org/springframework/http/converter/ResourceRegionHttpMessageConverter.java

@@ -183,8 +183,7 @@ protected void writeResourceRegion(ResourceRegion region, HttpOutputMessage outp
 			try {
 				in.close();
 			}
-			catch (IOException ex) {
-				// ignore
+			catch (IOException ignored) {
 			}
 		}
 	}
@@ -244,8 +243,7 @@ private void writeResourceRegionCollection(Collection<ResourceRegion> resourceRe
 					in.close();
 				}
 			}
-			catch (IOException ex) {
-				// ignore
+			catch (IOException ignored) {
 			}
 		}
 

spring-web/src/main/java/org/springframework/http/converter/xml/SourceHttpMessageConverter.java

@@ -270,8 +270,7 @@ private StreamSource readStreamSource(InputStream body) throws IOException {
 				transform(t, new StreamResult(os));
 				return os.count;
 			}
-			catch (TransformerException ex) {
-				// ignore
+			catch (TransformerException ignored) {
 			}
 		}
 		return null;

spring-web/src/main/java/org/springframework/http/server/reactive/AbstractListenerWriteProcessor.java

@@ -439,8 +439,7 @@ public <T> void onNext(AbstractListenerWriteProcessor<T> processor, T data) {
 				// ignore
 			}
 			@Override
-			public <T> void onError(AbstractListenerWriteProcessor<T> processor, Throwable ex) {
-				// ignore
+			public <T> void onError(AbstractListenerWriteProcessor<T> processor, Throwable ignored) {
 			}
 			@Override
 			public <T> void onComplete(AbstractListenerWriteProcessor<T> processor) {

spring-web/src/main/java/org/springframework/http/server/reactive/ServletHttpHandlerAdapter.java

@@ -309,26 +309,23 @@ private static void delegateTimeout(AsyncListener listener, AsyncEvent event) {
 			try {
 				listener.onTimeout(event);
 			}
-			catch (Exception ex) {
-				// Ignore
+			catch (Exception ignored) {
 			}
 		}
 
 		private static void delegateError(AsyncListener listener, AsyncEvent event) {
 			try {
 				listener.onError(event);
 			}
-			catch (Exception ex) {
-				// Ignore
+			catch (Exception ignored) {
 			}
 		}
 
 		private static void delegateComplete(AsyncListener listener, AsyncEvent event) {
 			try {
 				listener.onComplete(event);
 			}
-			catch (Exception ex) {
-				// Ignore
+			catch (Exception ignored) {
 			}
 		}
 

spring-web/src/main/java/org/springframework/web/client/HttpMessageConverterExtractor.java

@@ -152,8 +152,7 @@ private static byte[] getResponseBody(ClientHttpResponse response) {
 		try {
 			return FileCopyUtils.copyToByteArray(response.getBody());
 		}
-		catch (IOException ex) {
-			// ignore
+		catch (IOException ignored) {
 		}
 		return new byte[0];
 	}

spring-web/src/main/java/org/springframework/web/context/request/async/CallableInterceptorChain.java

@@ -113,8 +113,7 @@ private void cancelTask() {
 			try {
 				future.cancel(true);
 			}
-			catch (Throwable ex) {
-				// Ignore
+			catch (Throwable ignored) {
 			}
 		}
 	}

spring-web/src/main/java/org/springframework/web/context/request/async/StandardServletAsyncWebRequest.java

@@ -235,8 +235,7 @@ private int tryObtainLock() {
 					break;
 				}
 			}
-			catch (InterruptedException ex) {
-				// ignore
+			catch (InterruptedException ignored) {
 			}
 		}
 

spring-web/src/main/java/org/springframework/web/context/support/ServletContextResource.java

@@ -122,8 +122,7 @@ public boolean isReadable() {
 			try {
 				is.close();
 			}
-			catch (IOException ex) {
-				// ignore
+			catch (IOException ignored) {
 			}
 			return true;
 		}

spring-web/src/main/java/org/springframework/web/service/registry/HttpServiceProxyRegistryFactoryBean.java

@@ -151,8 +151,7 @@ private static void addGroupAdapter(
 				Class<?> clazz = ClassUtils.forName(className, HttpServiceGroupAdapter.class.getClassLoader());
 				groupAdapters.put(clientType, (HttpServiceGroupAdapter<?>) BeanUtils.instantiateClass(clazz));
 			}
-			catch (ClassNotFoundException ex) {
-				// ignore
+			catch (ClassNotFoundException ignored) {
 			}
 		}
 	}

spring-web/src/test/java/org/springframework/web/context/request/RequestContextListenerTests.java

@@ -93,7 +93,7 @@ void requestContextListenerWithDifferentThread() {
 		try {
 			thread.join();
 		}
-		catch (InterruptedException ex) {
+		catch (InterruptedException ignored) {
 		}
 		// Still bound to original thread, but at least completed.
 		assertThat(RequestContextHolder.getRequestAttributes()).isNotNull();