异常处理

org.springframework.web.client.ResourceAccessException: I/O error on POST request for “http://localhost:9411/api/v2/spans”: connect timed out

报错信息

  1. org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://localhost:9411/api/v2/spans": connect timed out; nested exception is java.net.SocketTimeoutException: connect timed out
  2.     at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:751)
  3.     at org.springframework.cloud.sleuth.zipkin2.sender.ZipkinRestTemplateWrapper.doExecute(ZipkinRestTemplateSenderConfiguration.java:228)
  4.     at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:644)
  5.     at org.springframework.cloud.sleuth.zipkin2.sender.RestTemplateSender.post(RestTemplateSender.java:129)
  6.     at org.springframework.cloud.sleuth.zipkin2.sender.RestTemplateSender$HttpPostCall.doExecute(RestTemplateSender.java:142)
  7.     at org.springframework.cloud.sleuth.zipkin2.sender.RestTemplateSender$HttpPostCall.doExecute(RestTemplateSender.java:132)
  8.     at zipkin2.Call$Base.execute(Call.java:380)
  9.     at zipkin2.reporter.AsyncReporter$BoundedAsyncReporter.flush(AsyncReporter.java:285)
  10.     at zipkin2.reporter.AsyncReporter$Flusher.run(AsyncReporter.java:354)
  11.     at java.lang.Thread.run(Thread.java:745)
  12. Caused by: java.net.SocketTimeoutException: connect timed out
  13.     at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
  14.     at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
  15.     at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
  16.     at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
  17.     at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
  18.     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
  19.     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
  20.     at java.net.Socket.connect(Socket.java:589)
  21.     at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
  22.     at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
  23.     at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
  24.     at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
  25.     at sun.net.www.http.HttpClient.New(HttpClient.java:308)
  26.     at sun.net.www.http.HttpClient.New(HttpClient.java:326)
  27.     at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
  28.     at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105)
  29.     at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
  30.     at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
  31.     at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:76)
  32.     at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
  33.     at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)
  34.     at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:742)
  35.     ... 9 common frames omitted

原因

依赖中含有 zipkin 依赖，没有配置 zipkin-server, 默认提交9411，新版本已经移除 zipkin依赖

解决方法：

删除pom文件中zipkin依赖

<dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>