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
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作者：怒吼的萝卜
链接：http://www.cnblogs.com/nhdlb/
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