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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2022/08/29 02:50:36 UTC
[GitHub] [dubbo] cl900503 opened a new issue, #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
cl900503 opened a new issue, #10517:
URL: https://github.com/apache/dubbo/issues/10517
``` java
@Configuration
public class ReferenceConfiguration {
@Bean
@DubboReference(interfaceClass = IdGeneratorService.Iface.class, version = "1.0", timeout = 5000, init = true, lazy = false)
public ReferenceBean<IdGeneratorService.Iface> idGeneratorService() {
return new ReferenceBean<IdGeneratorService.Iface>();
}
}
```
如上配置，并没有解决首次调用慢的问题（注：服务为thrift协议）
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[GitHub] [dubbo] chickenlj commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
chickenlj commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1233920990
目前看来，可能导致首次调用慢的因素有两个：
1. lazy proxy 导致首次调用发生时才启动个订阅动作。这个问题看起来你已经解决了
2. 另一个可能是 provider 侧自身需要预热
具体需要依赖你那边再分析一下耗时发生在了哪个位置。
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[GitHub] [dubbo] cl900503 commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
cl900503 commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1233655944
> 加一个在接受请求进来前的时间点调 rpc 接口，数据自己造一下
>
> 可以使用回声测试 https://dubbo.apache.org/zh/docs3-v2/java-sdk/advanced-features-and-usage/service/echo-service/
接口调用前，先进行了下面的动作：
``` java
@Bean
@DubboReference(interfaceClass = IdGeneratorService.Iface.class, version = "1.0", timeout = 5000, init = true, lazy = false)
public ReferenceBean<IdGeneratorService.Iface> idGeneratorService() {
return new ReferenceBean<IdGeneratorService.Iface>();
}
@Bean
public IdGeneratorService.Iface initIdGeneratorService(ReferenceBean<IdGeneratorService.Iface> idGeneratorService) {
IdGeneratorService.Iface initedId = idGeneratorService.getObject();
idGeneratorService.getReferenceConfig().setCheck(false);
idGeneratorService.getReferenceConfig().get();
return initedId;
}
```
后面通过下面方式注入
``` java
@Autowired
private IdGeneratorService.Iface initIdGeneratorService;
```
首次进行接口调用的时候，耗时有大幅缩减，但是相较于后续的调用，还是大概多耗时100ms，请指点下，这部分差距在进行什么动作，如何预热？
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[GitHub] [dubbo] jingshouyan commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
jingshouyan commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1230036120
这样没办法处理服务的上下线或缩扩容。
A 依赖B服务，但A启动时B还没启动完成，如何监听B上线呢，因为B上线时A需要预热
> 加一个在接受请求进来前的时间点调 rpc 接口，数据自己造一下
>
> 可以使用回声测试 https://dubbo.apache.org/zh/docs3-v2/java-sdk/advanced-features-and-usage/service/echo-service/
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[GitHub] [dubbo] AlbumenJ commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1229901987
lazyProxy 只是订阅是否是 lazy 创建的，本身是为了解决循环依赖的问题。预热还是要独立做的
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[GitHub] [dubbo] cl900503 commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
cl900503 commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1233991316
> 目前看来，可能导致首次调用慢的因素有两个：
>
> 1. lazy proxy 导致首次调用发生时才启动个订阅动作。这个问题看起来你已经解决了
> 2. 另一个可能是 provider 侧自身需要预热
>
> 具体需要依赖你那边再分析一下耗时发生在了哪个位置。
现象上看不像是 provider 侧，A调用B，重启B，重启后A请求B的第一次，同样会出现耗时久的现象。
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[GitHub] [dubbo] AlbumenJ commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1230026507
加一个在接受请求进来前的时间点调 rpc 接口，数据自己造一下
可以使用回声测试 https://dubbo.apache.org/zh/docs3-v2/java-sdk/advanced-features-and-usage/service/echo-service/
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[GitHub] [dubbo] AlbumenJ commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1231335493
那就是服务端的预热了，可以用 local 订阅
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[GitHub] [dubbo] AlbumenJ commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1229806381
首次调用还涉及了类加载等过程，如果要从根本上避免首次调用慢可以自己加些预热
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[GitHub] [dubbo] cl900503 commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
cl900503 commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1229830478
> 首次调用还涉及了类加载等过程，如果要从根本上避免首次调用慢可以自己加些预热
我看3.0版本ReferenceBean的getObject方法引入了lazyProxy概念，而不是像2.7版本直接调用get()，是不是目前官方没有提供提前预热的能力了？
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[GitHub] [dubbo] cl900503 commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
cl900503 commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1230007335
> lazyProxy 只是订阅是否是 lazy 创建的，本身是为了解决循环依赖的问题。预热还是要独立做的
能不能提供点思路，需要预热哪些东西，怎么预热？
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[GitHub] [dubbo] AlbumenJ commented on issue #10517: 通过@DubboReference方式注入服务，如何提前完成初始化工作，避免服务接口首次调用出现耗时较久的问题。
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10517:
URL: https://github.com/apache/dubbo/issues/10517#issuecomment-1234982971
首次请求会触发建连，可以网络抓下包看看用了多久
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