我有 zipkin 服务器正在运行，当我点击 zipkin 客户端休息 api 端点时，我收到以下错误
2017-06-10 23:16:08.782 INFO [product,d650504f4f922a51,d650504f4f922a51,true] 5676 --- [ix-ProductAPI-3] com.accenture.api.ProductAPI：列出所有产品休眠：选择 product0_.prod_id 作为 prod_id1_0_ , product0_.prod_description as prod_des2_0_ from product product0_ 2017-06-10 23:16:09.801 WARN [product,,,] 5676 --- [ender@698c7814)] zrAsyncReporter$BoundedAsyncReporter: Dropped 1 spans due to HttpClientErrorException(404 null)
org.springframework.web.client.HttpClientErrorException: org.springframework.web.client.DefaultResponseErrorHandler.handleError (DefaultResponseErrorHandler.java:63) 处的 404 null ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE ] 在 org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:700) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE] 在 org.springframework.web.client.RestTemplate .doExecute(RestTemplate.java:653) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:628) ~[ spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE] 在 org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:590) ~[spring-web-4.3.8.RELEASE.jar :4.3.8.RELEASE] 在 org.springframework.cloud.sleuth.zipkin.RestTemplateSender.post(RestTemplateSender.java:73) ~[spring-cloud-sleuth-zipkin-1.2.0.RELEASE.jar:1.2.0.RELEASE] at org.springframework.cloud.sleuth.zipkin.RestTemplateSender.sendSpans(RestTemplateSender.java:46) ~[spring -cloud-sleuth-zipkin-1.2.0.RELEASE.jar:1.2.0.RELEASE] 在 zipkin.reporter.AsyncReporter$BoundedAsyncReporter.flush(AsyncReporter.java:228) [zipkin-reporter-0.6.12.jar:na ] 在 zipkin.reporter.AsyncReporter$Builder.lambda$build$0(AsyncReporter.java:153) [zipkin-reporter-0.6.12.jar:na] 在 zipkin.reporter.AsyncReporter$Builder$$Lambda$1.run(未知来源）[zipkin-reporter-0.6.12.jar:na] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]发布] 在 zipkin.reporter.AsyncReporter$BoundedAsyncReporter.flush(AsyncReporter.java:228) [zipkin-reporter-0.6.12.jar:na] 在 zipkin.reporter.AsyncReporter$Builder.lambda$build$0(AsyncReporter.java: 153) [zipkin-reporter-0.6.12.jar:na] at zipkin.reporter.AsyncReporter$Builder$$Lambda$1.run(Unknown Source) [zipkin-reporter-0.6.12.jar:na] at java.lang .Thread.run(Thread.java:745) [na:1.8.0_101]发布] 在 zipkin.reporter.AsyncReporter$BoundedAsyncReporter.flush(AsyncReporter.java:228) [zipkin-reporter-0.6.12.jar:na] 在 zipkin.reporter.AsyncReporter$Builder.lambda$build$0(AsyncReporter.java: 153) [zipkin-reporter-0.6.12.jar:na] at zipkin.reporter.AsyncReporter$Builder$$Lambda$1.run(Unknown Source) [zipkin-reporter-0.6.12.jar:na] at java.lang .Thread.run(Thread.java:745) [na:1.8.0_101]