通常首次訪問都會比較慢,由於spring的懶加載機制,須要實例化一些類。hystrix默認的超時時間爲1秒,超事後,就會調用fallback代碼。解決方案有一下三種:spring
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds: 100000
hystrix.command.default.execution.timeout.enabled: false
feign.hystrix.enabled: false
消費者通常和api接口定義不在一個package下,致使啓動失敗。解決辦法引入api的package:apache
@SpringBootApplication(scanBasePackages= {"com.api"}) @EnableFeignClients(basePackages={"com.api"})
請參考https://my.oschina.net/u/182501/blog/1532081。api
Feign在默認狀況下使用的是JDK原生的URLConnection發送HTTP請求,沒有鏈接池,可是對每一個地址會保持一個長鏈接,即利用HTTP的persistence connection 。咱們能夠用Apache的HTTP Client替換Feign原始的http client, 從而獲取鏈接池、超時時間等與性能息息相關的控制能力。Spring Cloud從Brixtion.SR5版本開始支持這種替換,首先在項目中聲明Apache HTTP Client和feign-httpclient依賴:app
<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>${httpclient.version}</version> </dependency> <dependency> <groupId>com.netflix.feign</groupId> <artifactId>feign-httpclient</artifactId> <version>${feign-httpclient.version}</version> </dependency>
配置application.yml性能
feign: httpclient: enabled: true #啓用httpclient