Fix logging issue with MessageConverter

This commit fixes an issue with MappingJackson2HttpMessageConverter
where it always logs a Warning, even if another message converter
can handle it.

Issue: SPR-14163

Author: mogren

spring-web/src/main/java/org/springframework/http/converter/json/AbstractJackson2HttpMessageConverter.java

@@ -86,7 +86,6 @@ protected AbstractJackson2HttpMessageConverter(ObjectMapper objectMapper, MediaT
 		this.setDefaultCharset(DEFAULT_CHARSET);
 	}
 
-
 	/**
 	 * Set the {@code ObjectMapper} for this view.
 	 * If not set, a default {@link ObjectMapper#ObjectMapper() ObjectMapper} is used.
@@ -148,14 +147,8 @@ public boolean canRead(Type type, Class<?> contextClass, MediaType mediaType) {
 			return true;
 		}
 		Throwable cause = causeRef.get();
-		if (cause != null) {
-			String msg = "Failed to evaluate deserialization for type " + javaType;
-			if (logger.isDebugEnabled()) {
-				logger.warn(msg, cause);
-			}
-			else {
-				logger.warn(msg + ": " + cause);
-			}
+		if (cause != null && logger.isDebugEnabled()) {
+			logger.warn("Failed to evaluate deserialization for type " + javaType, cause);
 		}
 		return false;
 	}
@@ -170,14 +163,8 @@ public boolean canWrite(Class<?> clazz, MediaType mediaType) {
 			return true;
 		}
 		Throwable cause = causeRef.get();
-		if (cause != null) {
-			String msg = "Failed to evaluate serialization for type [" + clazz + "]";
-			if (logger.isDebugEnabled()) {
-				logger.warn(msg, cause);
-			}
-			else {
-				logger.warn(msg + ": " + cause);
-			}
+		if (cause != null && logger.isDebugEnabled()) {
+			logger.warn("Failed to evaluate serialization for type [" + clazz + "]", cause);
 		}
 		return false;
 	}