Question:

在调用外部接口时可能会由于延迟,造成造成Feign “Read timed out executing POST”

feign.RetryableException: Read timed out executing POST http://******at feign.FeignException.errorExecuting(FeignException.java:67)at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:104)at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:76)at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103)at com.sun.proxy.$Proxy113.getBaseRow(Unknown Source)
Caused by: java.net.SocketTimeoutException: Read timed outat 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 java.io.BufferedInputStream.fill(BufferedInputStream.java:246)at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)at java.io.BufferedInputStream.read(BufferedInputStream.java:345)at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:704)at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:647)at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1569)at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)at feign.Client$Default.convertResponse(Client.java:152)at feign.Client$Default.execute(Client.java:74)

solution:

Feign接口调用分两层，Ribbon的调用和Hystrix调用，理论上设置Ribbon的时间即可，但是Ribbon的超时时间和Hystrix的超时时间需要结合起来，按照木桶原则最低的就是Feign的超时时间，建议最好配置超时时间一致。经过配置一下application设置后，完美解决了问题。因为第三方接口中需要3~20秒不等的时间，所以这个数值也是根据自己的业务系统情况设置的。

application.xml:

#hystrix的超时时间
hystrix:command:default:execution:timeout:enabled: trueisolation:thread:timeoutInMilliseconds: 30000
#ribbon的超时时间
ribbon:ReadTimeout: 30000ConnectTimeout: 30000

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解决SpringCloud之Feign超时问题(Read timed out executing POST http://***)

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