test-test-service.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilit

最新使用微服務feign進行服務調用時，出現了如下錯誤：

test-test-service.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
           

具體的表現是，當 使用feign調用馬上就報錯，也沒有超過設定的逾時時間，我的配置如下：

ribbon:
  OkToRetryOnAllOperations: false #對所有操作請求都進行重試,預設false
  ReadTimeout: 60000   #負載均衡逾時時間，預設值5000
  ConnectTimeout: 3000 #ribbon請求連接配接的逾時時間，預設值2000
  MaxAutoRetries: 0     #對目前執行個體的重試次數，預設0
  MaxAutoRetriesNextServer: 1 #對切換執行個體的重試次數，預設1

hystrix:
  command:
    default:  #default全局有效，service id指定應用有效
      execution:
        timeout:
          #如果enabled設定為false，則請求逾時交給ribbon控制,為true,則逾時作為熔斷根據
          enabled: true
        isolation:
          thread:
            timeoutInMilliseconds: 60000 #斷路器逾時時間，預設1000ms
           

例如我設定的ribbon逾時時間為60秒，但調用1秒内就報錯，一開始懷疑是錯誤次數太多導緻熔斷，還設定了熔斷視窗和熔斷次數，後來發現，hystrix的timeoutInMilliseconds應該配置得比ribbon的大，這樣ribbon才會觸發逾時重試機制，将timeoutInMilliseconds設定成70000就可以了。此外說一點關于hystrix和ribbon的兩個關于逾時的設定，在feign調用過程中是數值較小的生效。如果各位網友遇到的問題不是我的這個解決方案，由于feign預設輸出的日志十分有限，就需要展示更多日志來排查問題，可以加上以下配置，将feign的調用日志詳細的展示出來，幫助我們排查，這裡我增加了一個配置類：

@Configuration
public class FeignConfig {


    /**
     * 配置請求重試
     * 
     */
    @Bean
    public Retryer feignRetryer() {
        return new Retryer.Default(200, SECONDS.toMillis(2), 10);
    }


    /**
     * 設定請求逾時時間
     *預設
         * public Options() {
         * this(10 * 1000, 60 * 1000);
         * }
     *
     */
    @Bean
    Request.Options feignOptions() {
        return new Request.Options(60 * 1000, 60 * 1000);
    }



    /**
     * 列印請求日志
     * @return
     */
    @Bean
    public feign.Logger.Level multipartLoggerLevel() {
        return feign.Logger.Level.FULL;
    }

}
           

控制台列印出來的日志就像下面所示：

2017-10-09 19:31:02.047 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] <--- HTTP/1.1 500  (607ms)
2017-10-09 19:31:02.047 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] cache-control: no-cache, no-store, max-age=0, must-revalidate
2017-10-09 19:31:02.047 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] connection: close
2017-10-09 19:31:02.047 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] content-type: application/json;charset=UTF-8
2017-10-09 19:31:02.047 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] date: Mon, 09 Oct 2017 11:31:07 GMT
2017-10-09 19:31:02.047 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] expires: 0
2017-10-09 19:31:02.048 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] pragma: no-cache
2017-10-09 19:31:02.048 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] transfer-encoding: chunked
2017-10-09 19:31:02.048 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] x-application-context: test-test-service:dev:8771
2017-10-09 19:31:02.048 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] x-content-type-options: nosniff
2017-10-09 19:31:02.048 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] x-frame-options: DENY
2017-10-09 19:31:02.048 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] x-xss-protection: 1; mode=block
2017-10-09 19:31:02.048 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] 
2017-10-09 19:31:02.049 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload]


 {
  "code" : 500,
  "error" : "Internal Server Error",
  "data" : null
}



2017-10-09 19:31:02.049 DEBUG [test-sys-test-service,e2818797113202e3,e2818797113202e3,true] 12972 --- [nio-8773-exec-2] c.x.test.client.testServiceClient       : [testServiceClient#upload] <--- END HTTP (72-byte body)