3
我在应用程序的服务器日志中收到奇怪的异常。当对某个URL进行GET请求时发生异常。该URL的格式如下 -Spring MVC - 无法调用自定义ExceptionHandler
/some_list/{id}/some_method
处理程序，它的定义是这样 -
@RestController
@Validated
public class SomeController {
@Autowired
private SomeService someService;
@RequestMapping(value = "/some_list/{id}/some_method", method = RequestMethod.GET)
public Collection<SomeObject> getCollection(
@PathVariable @SomeCustomJavaxConstraintValidator String id,
@RequestParam(required = true)
@SomeCustomJavaxConstraintValidator String someOtherID) {
return someService.getSomething(id, someOtherID);
}
// other methods
}
唯一的例外是这样的（消息格式，以适应问题区） -
2016-03-13 14:46:09.956 ERROR org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver -
Failed to invoke @ExceptionHandler method:
public org.springframework.http.ResponseEntity<SomeEntity>
com.hogehoge.GenericExceptionHandler.handleServiceException(
javax.servlet.http.HttpServletResponse,
com.hogehoge.CustomException)
java.lang.NullPointerException: Name is null
at java.lang.Enum.valueOf(Enum.java:236) ~[na:1.8.0_66]
at org.springframework.http.HttpMethod.valueOf(HttpMethod.java:27) ~[spring-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.http.server.ServletServerHttpRequest.getMethod(ServletServerHttpRequest.java:87) ~[spring-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:175) ~[spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:80) ~[spring-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:126) ~[spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver.doResolveHandlerMethodException(ExceptionHandlerExceptionResolver.java:363) ~[spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.handler.AbstractHandlerMethodExceptionResolver.doResolveException(AbstractHandlerMethodExceptionResolver.java:60) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver.resolveException(AbstractHandlerExceptionResolver.java:137) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.handler.HandlerExceptionResolverComposite.resolveException(HandlerExceptionResolverComposite.java:74) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processHandlerException(DispatcherServlet.java:1183) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1020) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) [tomcat8-servlet-api-8.0.26.jar:na]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat8-servlet-api-8.0.26.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518) [tomcat8-catalina-8.0.26.jar:8.0.26]
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091) [tomcat8-coyote-8.0.26.jar:8.0.26]
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673) [tomcat8-coyote-8.0.26.jar:8.0.26]
at org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor.doRun(Nio2Endpoint.java:1074) [tomcat8-coyote-8.0.26.jar:8.0.26]
at org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor.run(Nio2Endpoint.java:1033) [tomcat8-coyote-8.0.26.jar:8.0.26]
at org.apache.tomcat.util.net.Nio2Endpoint.processSocket0(Nio2Endpoint.java:594) [tomcat8-coyote-8.0.26.jar:8.0.26]
at org.apache.tomcat.util.net.Nio2Endpoint.processSocket(Nio2Endpoint.java:578) [tomcat8-coyote-8.0.26.jar:8.0.26]
at org.apache.tomcat.util.net.SecureNio2Channel$1.completed(SecureNio2Channel.java:86) [tomcat8-coyote-8.0.26.jar:8.0.26]
at org.apache.tomcat.util.net.SecureNio2Channel$1.completed(SecureNio2Channel.java:79) [tomcat8-coyote-8.0.26.jar:8.0.26]
at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126) [na:1.8.0_66]
at sun.nio.ch.Invoker$2.run(Invoker.java:218) [na:1.8.0_66]
at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112) [na:1.8.0_66]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_66]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_66]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat8-util-8.0.26.jar:8.0.26]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_66]
GenericExceptionHandler是一个@ControllerAdvice它是这样注册的 -
@ControllerAdvice
public class GenericExceptionHandler {
// fields and others......
@ResponseBody
@ExceptionHandler(CustomException.class)
public ResponseEntity<SomeEntity> handleServiceException(
HttpServletResponse response, CustomException e) {
// method implementation
}
我无法在本地环境中重现此异常，因为异常显然是随机发生的。我试图在堆栈跟踪之后调试它，并且它看起来像某种原因HttpServletRequest的getMethod方法返回null（!! ??），结果HttpMethod.valueOf正在抛出此异常，但我不知道这是为什么案子。
更新
虽然这是一个春天启动的应用程序，它正在部署一个独立的Tomcat服务器上。 POM文件已经使用maven插件进行配置，以便重新打包正确完成。此外，应用程序的包装已被标记为war。样本 -
您是否在您的Web应用程序中打包了一个servlet-api库，可能与容器中的servlet-api库冲突？ – thirstycrow
@thirstycrow：该应用程序正在部署在一个独立的tomcat容器上，在此之前它将被spring boot maven插件重新包装。另外，POM文件中没有包含servlet-api jar。所以我可以安全地假设没有重复的servlet依赖关系。请参阅spring boot maven插件配置的更新。 –