spring cloud利用feign和sentinel进行内部或外部远程调用

绝地灬酷狼 2022-10-10 12:30 85阅读 0赞

一、FeignClient注解  
FeignClient注解被@Target(ElementType.TYPE)修饰，表示FeignClient注解的作用目标在接口上

/\*

*  Copyright 2013-2016 the original author or authors.
 *  
 *  Licensed under the Apache License, Version 2.0 (the “License”);
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an “AS IS” BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.  
    \*/

package org.springframework.cloud.openfeign;

import java.lang.annotation.Documented;  
import java.lang.annotation.ElementType;  
import java.lang.annotation.Retention;  
import java.lang.annotation.RetentionPolicy;  
import java.lang.annotation.Target;

import org.springframework.core.annotation.AliasFor;

/\*\*

*  Annotation for interfaces declaring that a REST client with that interface should be
 *  created (e.g. for autowiring into another component). If ribbon is available it will be
 *  used to load balance the backend requests, and the load balancer can be configured
 *  using a `@RibbonClient` with the same name (i.e. value) as the feign client.
 *  
 *  @author Spencer Gibb
 *  @author Venil Noronha  
    \*/  
    @Target(ElementType.TYPE)  
    @Retention(RetentionPolicy.RUNTIME)  
    @Documented  
    public @interface FeignClient \{
    
    /\*\*
    
     *  The name of the service with optional protocol prefix. Synonym for \{@link \#name()
     *  name\}. A name must be specified for all clients, whether or not a url is provided.
     *  Can be specified as property key, eg: $\{propertyKey\}.  
        \*/  
        @AliasFor(“name”)  
        String value() default “”;
    
    /\*\*
    
     *  The service id with optional protocol prefix. Synonym for \{@link \#value() value\}.
     *  
     *  @deprecated use \{@link \#name() name\} instead  
        \*/  
        @Deprecated  
        String serviceId() default “”;
    
    /\*\*
    
     *  The service id with optional protocol prefix. Synonym for \{@link \#value() value\}.  
        \*/  
        @AliasFor(“value”)  
        String name() default “”;
    
    /\*\*
    
     *  Sets the `@Qualifier` value for the feign client.  
        \*/  
        String qualifier() default “”;
    
    /\*\*
    
     *  An absolute URL or resolvable hostname (the protocol is optional).  
        \*/  
        String url() default “”;
    
    /\*\*
    
     *  Whether 404s should be decoded instead of throwing FeignExceptions  
        \*/  
        boolean decode404() default false;
    
    /\*\*
    
     *  A custom `@Configuration` for the feign client. Can contain override
     *  `@Bean` definition for the pieces that make up the client, for instance
     *  \{@link feign.codec.Decoder\}, \{@link feign.codec.Encoder\}, \{@link feign.Contract\}.
     *  
     *  @see FeignClientsConfiguration for the defaults  
        \*/  
        Class<?>\[\] configuration() default \{\};
    
    /\*\*
    
     *  Fallback class for the specified Feign client interface. The fallback class must
     *  implement the interface annotated by this annotation and be a valid spring bean.  
        \*/  
        Class<?> fallback() default void.class;
    
    /\*\*
    
     *  Define a fallback factory for the specified Feign client interface. The fallback
     *  factory must produce instances of fallback classes that implement the interface
     *  annotated by \{@link FeignClient\}. The fallback factory must be a valid spring
     *  bean.
     *  
     *  @see feign.hystrix.FallbackFactory for details.  
        \*/  
        Class<?> fallbackFactory() default void.class;
    
    /\*\*
    
     *  Path prefix to be used by all method-level mappings. Can be used with or without
     *  `@RibbonClient`.  
        \*/  
        String path() default “”;
    
    /\*\*
    
     *  Whether to mark the feign proxy as a primary bean. Defaults to true.  
        \*/  
        boolean primary() default true;

\}  
声明接口之后，在代码中通过@Resource注入之后即可使用。@FeignClient标签的常用属性如下：

name：指定FeignClient的名称，如果项目使用了Ribbon，name属性会作为微服务的名称，用于服务发现  
url: url一般用于调试，可以手动指定@FeignClient调用的地址  
decode404:当发生http 404错误时，如果该字段位true，会调用decoder进行解码，否则抛出FeignException  
configuration: Feign配置类，可以自定义Feign的Encoder、Decoder、LogLevel、Contract  
fallback: 定义容错的处理类，当调用远程接口失败或超时时，会调用对应接口的容错逻辑，fallback指定的类必须实现@FeignClient标记的接口  
fallbackFactory: 工厂类，用于生成fallback类示例，通过这个属性我们可以实现每个接口通用的容错逻辑，减少重复的代码  
path: 定义当前FeignClient的统一前缀  
二：实例  
下面指定一个说话的接口，url配置的是同本地的前缀，name是要调用的微服务名称，在erurka启用下生效，此外还指定了失效转移的配置，使用的是Sentinel实现，详情见上篇文章

package cn.chinotan.feign;

import cn.chinotan.SaySomeThing;  
import cn.chinotan.config.feign.FeignConfiguration;  
import cn.chinotan.feign.fallback.SayServiceFallback;  
import org.springframework.cloud.openfeign.FeignClient;  
import org.springframework.web.bind.annotation.RequestBody;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestMethod;

/\*\*

*  @program: test
 *  @description: 说接口
 *  @author: xingcheng
 *  @create: 2019-01-19 18:05  
    \*\*/  
    @FeignClient(name = “sayService”, url = “http://localhost:11111”, fallback = SayServiceFallback.class, configuration = FeignConfiguration.class)  
    public interface SayService \{
    
    /\*\*
    
     *  说
     *  @param saySomeThing
     *  @return  
        \*/  
        @RequestMapping(value = “/feign/hello”, method = RequestMethod.POST)  
        SaySomeThing saySomeThing(@RequestBody SaySomeThing saySomeThing);

\}  
在使用fallback属性时，需要使用@Component注解

package cn.chinotan.feign.fallback;

import cn.chinotan.SaySomeThing;  
import cn.chinotan.feign.SayService;  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;

/\*\*

*  @program: test
 *  @description: say快速失败
 *  @author: xingcheng
 *  @create: 2019-01-19 18:18  
    \*\*/  
    public class SayServiceFallback implements SayService \{
    
    Logger logger = LoggerFactory.getLogger(SayServiceFallback.class);
    
    @Override  
    public SaySomeThing saySomeThing(SaySomeThing saySomeThing) \{  
    SaySomeThing saySomeThingFail = new SaySomeThing();  
    saySomeThingFail.setName(“错误”);  
    saySomeThingFail.setWords(“错误的话”);  
    logger.error(“调用失败”);  
    return saySomeThingFail;  
    \}  
    \}  
    接下是配置feign的配置信息

package cn.chinotan.config.feign;

import cn.chinotan.feign.fallback.EchoServiceFallback;  
import cn.chinotan.feign.fallback.SayServiceFallback;  
import feign.Logger;  
import org.springframework.context.annotation.Bean;  
import org.springframework.context.annotation.Configuration;

/\*\*

*  @program: test
 *  @description: FeignConfiguration
 *  @author: xingcheng
 *  @create: 2019-01-12 18:44  
    \*\*/  
    @Configuration  
    public class FeignConfiguration \{  
    @Bean  
    public SayServiceFallback sayServiceFallback() \{  
    return new SayServiceFallback();  
    \}
    
    @Bean  
    public Logger.Level feignLoggerLevel() \{  
    return Logger.Level.FULL;  
    \}  
    \}  
    两个bean指定降级类和日志级别打印，并注入到spring上下文

每一个被创建的Feign客户端都会有一个logger。该logger默认的名称为Feign客户端对应的接口的全限定名。Feign日志记录只能响应DEBUG日志级别。

例如

# feign日志 #

logging.level.cn.chinotan.feign: DEBUG  
针对每一个Feign客户端，可以配置一个Logger.Level对象，通过该对象控制日志输出内容。

Logger.Level有如下几种选择：

NONE, 不记录日志 (默认)。

BASIC, 只记录请求方法和URL以及响应状态代码和执行时间。

HEADERS, 记录请求和应答的头的基本信息。

FULL, 记录请求和响应的头信息，正文和元数据。

之后配置异常报警信息，主要通过实现ErrorDecoder接口实现

package cn.chinotan.config.feign;

import feign.FeignException;  
import feign.Response;  
import feign.codec.ErrorDecoder;  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
import org.springframework.context.annotation.Configuration;

import static feign.FeignException.errorStatus;

/\*\*

*  @program: test
 *  @description: feign调用异常统一处理
 *  @author: xingcheng
 *  @create: 2019-01-19 19:47  
    \*\*/  
    @Configuration  
    public class MyErrorDecoder implements ErrorDecoder \{
    
    Logger logger = LoggerFactory.getLogger(MyErrorDecoder.class);
    
    @Override  
    public Exception decode(String methodKey, Response response) \{  
    FeignException exception = errorStatus(methodKey, response);  
    // 报警  
    logger.error(“methodKey: \{\}, reason is \{\}”, methodKey, response.toString());  
    return exception;  
    \}

\}  
三：运行

配置一个请求controller

package cn.chinotan.controller;

import cn.chinotan.SaySomeThing;  
import cn.chinotan.feign.SayService;  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.web.bind.annotation.PostMapping;  
import org.springframework.web.bind.annotation.RequestBody;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RestController;

/\*\*

*  @program: test
 *  @description: 最简单的使用 Sentinel 的例子
 *  @author: xingcheng
 *  @create: 2019-01-20 18:01  
    \*\*/  
    @RestController  
    @RequestMapping("/feign")  
    public class FeignController \{
    
    @Autowired  
    SayService sayService;
    
    @PostMapping(value = “/hello”)  
    public SaySomeThing hello(@RequestBody SaySomeThing saySomeThing) \{  
    // throw new RuntimeException(“我是异常”);  
    return saySomeThing;  
    \}
    
    @PostMapping(value = “/say”)  
    public SaySomeThing echoFeign(@RequestBody SaySomeThing saySomeThing) \{  
    return sayService.saySomeThing(saySomeThing);  
    \}  
    \}  
    运行结果：

日志打印：

INFO: log base dir is: /Users/xingcheng/logs/csp/  
INFO: log name use pid is: false  
2019-01-19 20:11:45.916 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] —> POST http://localhost:11111/feign/hello HTTP/1.1  
2019-01-19 20:11:45.916 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] Content-Type: application/json;charset=UTF-8  
2019-01-19 20:11:45.916 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] Content-Length: 36  
2019-01-19 20:11:45.917 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\]  
2019-01-19 20:11:45.917 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] \{“name”:“chinotan”,“words”:“世界”\}  
2019-01-19 20:11:45.917 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] —> END HTTP (36-byte body)  
2019-01-19 20:11:45.944 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] <— HTTP/1.1 200 (27ms)  
2019-01-19 20:11:45.944 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] cache-control: no-cache, no-store, max-age=0, must-revalidate  
2019-01-19 20:11:45.944 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] content-type: application/json;charset=UTF-8  
2019-01-19 20:11:45.944 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] date: Sat, 19 Jan 2019 12:11:45 GMT  
2019-01-19 20:11:45.944 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] expires: 0  
2019-01-19 20:11:45.944 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] pragma: no-cache  
2019-01-19 20:11:45.944 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] transfer-encoding: chunked  
2019-01-19 20:11:45.944 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-content-type-options: nosniff  
2019-01-19 20:11:45.945 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-frame-options: DENY  
2019-01-19 20:11:45.945 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-xss-protection: 1; mode=block  
2019-01-19 20:11:45.945 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\]  
2019-01-19 20:11:45.951 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] \{“name”:“chinotan”,“words”:“世界”\}  
2019-01-19 20:11:45.951 DEBUG 2932 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] <— END HTTP (36-byte body)  
2019-01-19 20:37:41.552 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] —> POST http://localhost:11111/feign/hello HTTP/1.1  
2019-01-19 20:37:41.552 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] Content-Type: application/json;charset=UTF-8  
2019-01-19 20:37:41.552 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] Content-Length: 36  
2019-01-19 20:37:41.552 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\]  
2019-01-19 20:37:41.552 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] \{“name”:“chinotan”,“words”:“世界”\}  
2019-01-19 20:37:41.552 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] —> END HTTP (36-byte body)  
2019-01-19 20:37:41.559 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] <— HTTP/1.1 200 (7ms)  
2019-01-19 20:37:41.559 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] cache-control: no-cache, no-store, max-age=0, must-revalidate  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] content-type: application/json;charset=UTF-8  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] date: Sat, 19 Jan 2019 12:37:41 GMT  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] expires: 0  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] pragma: no-cache  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] transfer-encoding: chunked  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-content-type-options: nosniff  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-frame-options: DENY  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-xss-protection: 1; mode=block  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\]  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] \{“name”:“chinotan”,“words”:“世界”\}  
2019-01-19 20:37:41.560 DEBUG 2932 — \[io-11111-exec-7\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] <— END HTTP (36-byte body)  
可以看到请求地址，入参和出参，headers信息都打印出来了

接下来试试异常情况，修改controller:

@PostMapping(value = “/hello”)  
public SaySomeThing hello(@RequestBody SaySomeThing saySomeThing) \{  
throw new RuntimeException(“我是异常”);  
// return saySomeThing;  
\}  
运行结果：

日志打印：

INFO: log base dir is: /Users/xingcheng/logs/csp/  
INFO: log name use pid is: false  
2019-01-19 20:40:18.049 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] —> POST http://localhost:11111/feign/hello HTTP/1.1  
2019-01-19 20:40:18.049 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] Content-Type: application/json;charset=UTF-8  
2019-01-19 20:40:18.049 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] Content-Length: 36  
2019-01-19 20:40:18.049 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\]  
2019-01-19 20:40:18.049 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] \{“name”:“chinotan”,“words”:“世界”\}  
2019-01-19 20:40:18.049 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] —> END HTTP (36-byte body)  
2019-01-19 20:40:18.083 ERROR 3137 — \[io-11111-exec-3\] o.a.c.c.C.\[.\[.\[/\].\[dispatcherServlet\] : Servlet.service() for servlet \[dispatcherServlet\] in context with path \[\] threw exception \[Request processing failed; nested exception is java.lang.RuntimeException: 我是异常\] with root cause

java.lang.RuntimeException: 我是异常  
at cn.chinotan.controller.FeignController.hello(FeignController.java:26) ~\[classes/:na\]  
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~\[na:1.8.0\_162\]  
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~\[na:1.8.0\_162\]  
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~\[na:1.8.0\_162\]  
at java.lang.reflect.Method.invoke(Method.java:498) ~\[na:1.8.0\_162\]  
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) ~\[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~\[tomcat-embed-websocket-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:158) ~\[spring-boot-actuator-2.0.3.RELEASE.jar:2.0.3.RELEASE\]  
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:126) ~\[spring-boot-actuator-2.0.3.RELEASE.jar:2.0.3.RELEASE\]  
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:111) ~\[spring-boot-actuator-2.0.3.RELEASE.jar:2.0.3.RELEASE\]  
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:90) ~\[spring-boot-actuator-2.0.3.RELEASE.jar:2.0.3.RELEASE\]  
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.springframework.security.web.FilterChainProxy V i r t u a l F i l t e r C h a i n . d o F i l t e r ( F i l t e r C h a i n P r o x y . j a v a : 320 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . a c c e s s . i n t e r c e p t . F i l t e r S e c u r i t y I n t e r c e p t o r . i n v o k e ( F i l t e r S e c u r i t y I n t e r c e p t o r . j a v a : 127 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . a c c e s s . i n t e r c e p t . F i l t e r S e c u r i t y I n t e r c e p t o r . d o F i l t e r ( F i l t e r S e c u r i t y I n t e r c e p t o r . j a v a : 91 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . F i l t e r C h a i n P r o x y VirtualFilterChain.doFilter(FilterChainProxy.java:320) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.FilterChainProxy VirtualFilterChain.doFilter(FilterChainProxy.java:320) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.FilterChainProxyVirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.FilterChainProxy V i r t u a l F i l t e r C h a i n . d o F i l t e r ( F i l t e r C h a i n P r o x y . j a v a : 334 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . s e s s i o n . S e s s i o n M a n a g e m e n t F i l t e r . d o F i l t e r ( S e s s i o n M a n a g e m e n t F i l t e r . j a v a : 137 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . F i l t e r C h a i n P r o x y VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.FilterChainProxy VirtualFilterChain.doFilter(FilterChainProxy.java:334) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.FilterChainProxyVirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.FilterChainProxy V i r t u a l F i l t e r C h a i n . d o F i l t e r ( F i l t e r C h a i n P r o x y . j a v a : 334 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . s e r v l e t a p i . S e c u r i t y C o n t e x t H o l d e r A w a r e R e q u e s t F i l t e r . d o F i l t e r ( S e c u r i t y C o n t e x t H o l d e r A w a r e R e q u e s t F i l t e r . j a v a : 170 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . F i l t e r C h a i n P r o x y VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.FilterChainProxy VirtualFilterChain.doFilter(FilterChainProxy.java:334) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.FilterChainProxyVirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.FilterChainProxy V i r t u a l F i l t e r C h a i n . d o F i l t e r ( F i l t e r C h a i n P r o x y . j a v a : 334 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . a u t h e n t i c a t i o n . w w w . B a s i c A u t h e n t i c a t i o n F i l t e r . d o F i l t e r I n t e r n a l ( B a s i c A u t h e n t i c a t i o n F i l t e r . j a v a : 158 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . w e b . f i l t e r . O n c e P e r R e q u e s t F i l t e r . d o F i l t e r ( O n c e P e r R e q u e s t F i l t e r . j a v a : 107 )   \[ s p r i n g − w e b − 5.0.7. R E L E A S E . j a r : 5.0.7. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . F i l t e r C h a i n P r o x y VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:158) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\] at org.springframework.security.web.FilterChainProxy VirtualFilterChain.doFilter(FilterChainProxy.java:334) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:158) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) \[spring−web−5.0.7.RELEASE.jar:5.0.7.RELEASE\]atorg.springframework.security.web.FilterChainProxyVirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.FilterChainProxy V i r t u a l F i l t e r C h a i n . d o F i l t e r ( F i l t e r C h a i n P r o x y . j a v a : 334 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . h e a d e r . H e a d e r W r i t e r F i l t e r . d o F i l t e r I n t e r n a l ( H e a d e r W r i t e r F i l t e r . j a v a : 66 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . w e b . f i l t e r . O n c e P e r R e q u e s t F i l t e r . d o F i l t e r ( O n c e P e r R e q u e s t F i l t e r . j a v a : 107 )   \[ s p r i n g − w e b − 5.0.7. R E L E A S E . j a r : 5.0.7. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . F i l t e r C h a i n P r o x y VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\] at org.springframework.security.web.FilterChainProxy VirtualFilterChain.doFilter(FilterChainProxy.java:334) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) \[spring−web−5.0.7.RELEASE.jar:5.0.7.RELEASE\]atorg.springframework.security.web.FilterChainProxyVirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.FilterChainProxy V i r t u a l F i l t e r C h a i n . d o F i l t e r ( F i l t e r C h a i n P r o x y . j a v a : 334 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . c o n t e x t . r e q u e s t . a s y n c . W e b A s y n c M a n a g e r I n t e g r a t i o n F i l t e r . d o F i l t e r I n t e r n a l ( W e b A s y n c M a n a g e r I n t e g r a t i o n F i l t e r . j a v a : 56 )   \[ s p r i n g − s e c u r i t y − w e b − 5.0.6. R E L E A S E . j a r : 5.0.6. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . w e b . f i l t e r . O n c e P e r R e q u e s t F i l t e r . d o F i l t e r ( O n c e P e r R e q u e s t F i l t e r . j a v a : 107 )   \[ s p r i n g − w e b − 5.0.7. R E L E A S E . j a r : 5.0.7. R E L E A S E \] a t o r g . s p r i n g f r a m e w o r k . s e c u r i t y . w e b . F i l t e r C h a i n P r o x y VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\] at org.springframework.security.web.FilterChainProxy VirtualFilterChain.doFilter(FilterChainProxy.java:334) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) \[spring−security−web−5.0.6.RELEASE.jar:5.0.6.RELEASE\]atorg.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) \[spring−web−5.0.7.RELEASE.jar:5.0.7.RELEASE\]atorg.springframework.security.web.FilterChainProxyVirtualFilterChain.doFilter(FilterChainProxy.java:334) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) ~\[spring-security-web-5.0.6.RELEASE.jar:5.0.6.RELEASE\]  
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~\[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at com.alibaba.csp.sentinel.adapter.servlet.CommonFilter.doFilter(CommonFilter.java:89) ~\[sentinel-web-servlet-1.4.0.jar:na\]  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~\[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.coyote.AbstractProtocol C o n n e c t i o n H a n d l e r . p r o c e s s ( A b s t r a c t P r o t o c o l . j a v a : 790 ) \[ t o m c a t − e m b e d − c o r e − 8.5.31. j a r : 8.5.31 \] a t o r g . a p a c h e . t o m c a t . u t i l . n e t . N i o E n d p o i n t ConnectionHandler.process(AbstractProtocol.java:790) \[tomcat-embed-core-8.5.31.jar:8.5.31\] at org.apache.tomcat.util.net.NioEndpoint ConnectionHandler.process(AbstractProtocol.java:790)\[tomcat−embed−core−8.5.31.jar:8.5.31\]atorg.apache.tomcat.util.net.NioEndpointSocketProcessor.doRun(NioEndpoint.java:1468) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) \[na:1.8.0\_162\]  
at java.util.concurrent.ThreadPoolExecutor W o r k e r . r u n ( T h r e a d P o o l E x e c u t o r . j a v a : 624 ) \[ n a : 1.8. 0 1 62 \] a t o r g . a p a c h e . t o m c a t . u t i l . t h r e a d s . T a s k T h r e a d Worker.run(ThreadPoolExecutor.java:624) \[na:1.8.0\_162\] at org.apache.tomcat.util.threads.TaskThread Worker.run(ThreadPoolExecutor.java:624)\[na:1.8.0162\]atorg.apache.tomcat.util.threads.TaskThreadWrappingRunnable.run(TaskThread.java:61) \[tomcat-embed-core-8.5.31.jar:8.5.31\]  
at java.lang.Thread.run(Thread.java:748) \[na:1.8.0\_162\]

2019-01-19 20:40:18.112 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] <— HTTP/1.1 500 (62ms)  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] cache-control: no-cache, no-store, max-age=0, must-revalidate  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] connection: close  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] content-type: application/json;charset=UTF-8  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] date: Sat, 19 Jan 2019 12:40:18 GMT  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] expires: 0  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] pragma: no-cache  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] transfer-encoding: chunked  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-content-type-options: nosniff  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-frame-options: DENY  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] x-xss-protection: 1; mode=block  
2019-01-19 20:40:18.113 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\]  
2019-01-19 20:40:18.114 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] \{“timestamp”:“2019-01-19T12:40:18.094+0000”,“status”:500,“error”:“Internal Server Error”,“message”:“我是异常”,“path”:"/feign/hello"\}  
2019-01-19 20:40:18.114 DEBUG 3137 — \[io-11111-exec-2\] cn.chinotan.feign.SayService : \[SayService\#saySomeThing\] <— END HTTP (136-byte body)  
2019-01-19 20:40:18.116 ERROR 3137 — \[io-11111-exec-2\] cn.chinotan.config.feign.MyErrorDecoder : methodKey: SayService\#saySomeThing(SaySomeThing), reason is HTTP/1.1 500  
cache-control: no-cache, no-store, max-age=0, must-revalidate  
connection: close  
content-type: application/json;charset=UTF-8  
date: Sat, 19 Jan 2019 12:40:18 GMT  
expires: 0  
pragma: no-cache  
transfer-encoding: chunked  
x-content-type-options: nosniff  
x-frame-options: DENY  
x-xss-protection: 1; mode=block

\{“timestamp”:“2019-01-19T12:40:18.094+0000”,“status”:500,“error”:“Internal Server Error”,“message”:“我是异常”,“path”:"/feign/hello"\}  
2019-01-19 20:40:18.116 ERROR 3137 — \[io-11111-exec-2\] c.c.feign.fallback.SayServiceFallback : 调用失败  
可见利用feign组件可以轻松的实现远程接口的调用，监控和日志，配合Sentinel可以轻松实现流量控制和降级等

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