解决feign调用接口不稳定的问题

时间：2020-09-30 10:57:44|栏目：JAVA代码|点击：次

我就废话不多说了，大家还是直接看代码吧~

Caused by: java.net.SocketException: Software caused connection abort: recv failed
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
	at java.net.SocketInputStream.read(SocketInputStream.java:170)
	at java.net.SocketInputStream.read(SocketInputStream.java:141)
	at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:137)
	at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:153)
	at org.apache.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:282)
	at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:140)
	at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57)
	at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259)
	at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:163)
	at org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:167)
	at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273)
	at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125)
	at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:271)
	at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)
	at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)
	at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
	at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
	at feign.httpclient.ApacheHttpClient.execute(ApacheHttpClient.java:87)
	at org.springframework.cloud.netflix.feign.ribbon.RetryableFeignLoadBalancer$1.doWithRetry(RetryableFeignLoadBalancer.java:92)
	at org.springframework.cloud.netflix.feign.ribbon.RetryableFeignLoadBalancer$1.doWithRetry(RetryableFeignLoadBalancer.java:77)
	at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:286)
	at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:163)
	at org.springframework.cloud.netflix.feign.ribbon.RetryableFeignLoadBalancer.execute(RetryableFeignLoadBalancer.java:77)
	at org.springframework.cloud.netflix.feign.ribbon.RetryableFeignLoadBalancer.execute(RetryableFeignLoadBalancer.java:48)
	at com.netflix.client.AbstractLoadBalancerAwareClient$1.call(AbstractLoadBalancerAwareClient.java:109)
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:303)
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:287)
	at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:231)
	at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:228)
	at rx.Observable.unsafeSubscribe(Observable.java:10211)
	at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:286)
	at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onNext(OnSubscribeConcatMap.java:144)
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:185)
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180)
	at rx.Observable.unsafeSubscribe(Observable.java:10211)
	at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94)
	at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42)
	at rx.Observable.unsafeSubscribe(Observable.java:10211)
	at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber$1.call(OperatorRetryWithPredicate.java:127)
	at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:73)
	at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:52)
	at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:79)
	at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:45)
	at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276)
	at rx.Subscriber.setProducer(Subscriber.java:209)
	at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:138)
	at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:129)
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
	at rx.Observable.subscribe(Observable.java:10307)
	at rx.Observable.subscribe(Observable.java:10274)
	at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:445)
	at rx.observables.BlockingObservable.single(BlockingObservable.java:342)
	at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:117)
	at org.springframework.cloud.netflix.feign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:63)
	at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:97)
	... 117 common frames omitted

feign在调用时，会有不稳定的情况出现，时而出现接口调不通。解决方案如下，复写FeignRibbonClientAutoConfiguration中的HttpClient的配置。代码如下：

import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.NoConnectionReuseStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.ssl.SSLContexts;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
 
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.KeyManagementException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate; 
 
@Component
public class FeignRibbonHttpClientPoolConfig {
 
  private static final int POOL_MAX_TOTAL = 3000;
  private static final int DEFAULT_MAX_PER_ROUTE = 500;
 
  //validateAfterInactivity 空闲永久连接检查间隔，这个牵扯的还比较多
  //官方推荐使用这个来检查永久链接的可用性，而不推荐每次请求的时候才去检查
  private static final int VALIDATE_AFTER_INACTIVITY = 1000;
 
  @Bean(name = "httpClient", destroyMethod = "close")
  CloseableHttpClient httpClient() throws KeyManagementException {
    return buildCloseableHttpClient();
  }
 
  /**
   * 构建HttpClient连接池
   *
   * @return
   * @throws KeyManagementException
   */
  public CloseableHttpClient buildCloseableHttpClient() throws KeyManagementException {
    SSLContext sslcontext = SSLContexts.createDefault();
    sslcontext.init(null, new TrustManager[]{new TrustAnyManager()}, null); //设置https客户端信任万能证书
    SSLConnectionSocketFactory ssf = new SSLConnectionSocketFactory(sslcontext, NoopHostnameVerifier.INSTANCE);
    //注册请求方式，根据URL自动请求
    Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
        .register("http", PlainConnectionSocketFactory.INSTANCE)
        .register("https", ssf)
        .build();
    //创建Http连接池，单位时间内释放已使用过连接池中的连接
    PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
    connectionManager.setMaxTotal(POOL_MAX_TOTAL);
    connectionManager.setDefaultMaxPerRoute(DEFAULT_MAX_PER_ROUTE);
    connectionManager.setValidateAfterInactivity(VALIDATE_AFTER_INACTIVITY);
 
    return HttpClients.custom()
        .setConnectionManager(connectionManager)
        .setConnectionReuseStrategy(NoConnectionReuseStrategy.INSTANCE)
        .build();
  }
 
  class TrustAnyManager implements X509TrustManager {
    public void checkClientTrusted(X509Certificate[] chain,
                    String authType) throws CertificateException {
    }
 
    public void checkServerTrusted(X509Certificate[] chain,
                    String authType) throws CertificateException {
    }
 
    public X509Certificate[] getAcceptedIssuers() {
      return new X509Certificate[]{};
    }
  }
}

补充知识：springcloud之FeignClient访问微服务接口缓慢

昨天开发FeignClient，想调用微服务。逻辑是A服务调用B服务。AB在同一个局域网内。

经过反复测试，有一个访问缓慢的现象，具体表现为：

程序启动第一次访问初始化1.2秒左右，还可以理解。

但后面访问还是要1.1秒左右（格式化到SSS毫秒打印日志监控的）。

但如果连续访问几次，后面几次又是几十毫秒。过一会再访问，或者换浏览器换post工具请求，又会1.2秒左右。

当时就有点懵逼，这么成熟的工具不可能会这么慢吧，都是一个局域网。

排查了eureka注册中心，发现B服务多注册了一个，IP地址是192开头，经过询问，是一个同事的笔记本连接wifi，wifi自动分配了192开头的ip，笔记本是可以访问注册中心和其他服务的。但其他服务是访问不了这台笔记本的。

也就是说，B服务的一个注册的网络和其他服务是不通的。

但不知道为什么eureka却认为192ip注册是一个正确的微服务，而且一直是UP状态。注册中心的ip肯定是访问不了笔记本192ip的。

手工访问了一下192ip，不会直接提示404或网络错误，而是会加载一会。

这也许导致了FeignClient认为192ip是一台可用的机器。所以第一次请求的时候就去请求192ip，但没返回，到了超时时间，再换B服务的其他地址，就导致了耗时。