SpringMVC的400错误日志输出问题

Question

错误详情：

org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not instantiate value of type [simple type, class com.skynet.data.bean.Function] from Integral number (9); no single-int-arg constructor/factory method

这很简单的错误，一眼就看出问题所在，问题是我们的环境，这个只给客户端一个400错误码，根本不知道具体错误，日志也没有输出。还要一步一步断点到SpringMVC的源码去看错误详情。

原因也知道了：配置中使用

<mvc:annotation-driven>
		<mvc:message-converters register-defaults="true">
			<bean class="com.***.web.util.ObjectHttpMessageConverter" />
		</mvc:message-converters>
	</mvc:annotation-driven>

转换提交参数到controller方法的对象参数出问题了，然后被SpringMVC默认的错误处理器处理了，返回400。

问题是这个错误日志为什么不输出：：

maven:

<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
			<exclusions>
	            <exclusion>
	                <groupId>commons-logging</groupId>
	                <artifactId>commons-logging</artifactId>
	            </exclusion>
        	</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>${spring.version}</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3.1</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-core</artifactId>
			<version>${jackson.core.version}</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>${jackson.core.version}</version>
		</dependency>
		<dependency>
			<groupId>org.codehaus.jackson</groupId>
			<artifactId>jackson-mapper-asl</artifactId>
			<version>${jackson.version}</version>
		</dependency>
		<dependency>
			<groupId>org.json</groupId>
			<artifactId>json</artifactId>
			<version>20141113</version>
		</dependency>
		<dependency>
			<groupId>com.ning</groupId>
			<artifactId>async-http-client</artifactId>
			<version>1.9.31</version>
		</dependency>
		<dependency>
			<groupId>org.apache.tomcat</groupId>
			<artifactId>tomcat-servlet-api</artifactId>
			<version>${tomcat.version}</version>
			<scope>provided</scope>
		</dependency>

		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-api</artifactId>
			<version>2.3</version>
		</dependency>
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-core</artifactId>
			<version>2.3</version>
		</dependency>
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-jcl</artifactId>
			<version>2.3</version>
		</dependency>
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-web</artifactId>
			<version>2.3</version>
		</dependency>
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-slf4j-impl</artifactId>
			<version>2.3</version>
		</dependency>

		<dependency>
			<groupId>com.datastax.cassandra</groupId>
			<artifactId>cassandra-driver-mapping</artifactId>
			<version>2.1.7</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-cassandra</artifactId>
			<version>1.2.2.RELEASE</version>
		</dependency>
		<!-- dependency> <groupId>org.apache.solr</groupId> <artifactId>solr-solrj</artifactId> 
			<version>5.4.0</version> </dependency -->

		<!-- dependency> <groupId>com.huawei.openstore</groupId> <artifactId>uploader-sdk</artifactId> 
			<version>0.0.2-SNAPSHOT</version> </dependency> <dependency> <groupId>com.huawei.openstore</groupId> 
			<artifactId>oauth2-json</artifactId> <version>0.3.5</version> </dependency -->
		<!-- Huawei dependency -->
		<dependency>
			<groupId>com.huawei.esdk</groupId>
			<artifactId>obs-sdk</artifactId>
			<version>0.0.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.httpcomponents</groupId>
			<artifactId>httpclient</artifactId>
			<version>4.5.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.httpcomponents</groupId>
			<artifactId>httpcore</artifactId>
			<version>4.4.4</version>
		</dependency>
		<dependency>
			<groupId>com.jamesmurty.utils</groupId>
			<artifactId>java-xmlbuilder</artifactId>
			<version>1.0</version>
		</dependency>
		<dependency>
			<groupId>jdom</groupId>
			<artifactId>jdom</artifactId>
			<version>1.1</version>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.17</version>
		</dependency>

		<!-- Huawei dependency end -->

		<dependency>
			<groupId>org.apache.tiles</groupId>
			<artifactId>tiles-core</artifactId>
			<version>${tiles.version}</version>
		</dependency>
		<dependency>
			<groupId>org.apache.tiles</groupId>
			<artifactId>tiles-jsp</artifactId>
			<version>${tiles.version}</version>
		</dependency>

		<!-- JPush dependency start -->
		<dependency>
			<groupId>cn.jpush.api</groupId>
			<artifactId>jpush-client</artifactId>
			<version>3.2.8</version>
		</dependency>

我自己跟踪到：

org. springframework. web. servlet. handler. AbstractHandlerExceptionResolver.logException

Answer 1

t'wen