SpringCloud：Feign调用接口不稳定问题以及如何设置超时

1. Feign调用接口不稳定报错

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。

解决办法：

创建FeignRibbonHttpClientPoolConfig配置类。

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[]{};
        }
    }
}

2. Feign调用出现 connect  time  out 超时问题.

因为feign已经集成robbon,hystrix,调用在规定时间内达不到就会报上述错误,并且这个规定时间会很短

解决办法:配置文件加入如下配置: 指的是在调用的一方

#连接超时和读超时(以properties文件形式为例)：

feign.client.config.springApplicationName.connectTimeout=60000.

feign.client.config.springApplicationName.readTimeout=60000.
#禁用Hystrix熔断检测(熔断检测默认是1秒)
feign.hystrix.enabled= false

#spring.ApplicationName是服务提供方注册到eureka上的应用名称.

配置完成后，还需要配置Hystrix的熔断时间，如果Hystrix时长小于feign的超时时长，那feign的超时设置就不会生效

#配置hystrix的熔断时间
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds = 60000

 

或者

设置全局配置

#设置连接超时
ribbon.ConnectTimeout= 1000
#设置读取超时
ribbon.ReadTimeout= 1000

指定服务配置

#设置针对my-plan服务的连接超时
my-plan.ribbon.ConnectTimeout= 10000
#设置针对my-plan服务的读取超时
my-plan.ribbon.ReadTimeout= 10000
#设置针对my-plan服务所有操作请求都进行重试
my-plan.ribbon.OkToRetryOnAllOperations= true
#设置针对my-plan服务切换实例的重试次数
my-plan.ribbon.MaxAutoRetriesNextServer= 2
#设置针对my-plan服务的当前实例的重试次数
my-plan.ribbon.MaxAutoRetries= 1

文章转载至：https://blog.csdn.net/flysun3344/article/details/81117403