zrlw commented on issue #8993: URL: https://github.com/apache/dubbo/issues/8993#issuecomment-938568861
翻了一下连接zk出现超时前面的测试类的日志，用use registry as config-center为关键词查了同一日志内的其余25个zk连接耗时情况，除了第1个zk连接耗时470ms比较久之外，其余24个zk连接耗时都在40ms内，比如下面这个不过20多ms： ``` 2021-10-08T07:35:39.1812856Z [08/10/21 07:35:39:179 UTC] main INFO deploy.DefaultApplicationDeployer: [DUBBO] use registry as config-center: <dubbo:config-center highestPriority="false" id="config-center-zookeeper-127.0.0.1-36605" address="zookeeper://127.0.0.1:36605" protocol="zookeeper" port="36605" />, dubbo version: 3.0.4-SNAPSHOT, current host: 172.19.112.1 《== 紧接着DefaultApplicationDeployer会执行getDynamicConfiguration方法开始连接zk 2021-10-08T07:35:39.2028731Z [08/10/21 07:35:39:199 UTC] Curator-ConnectionStateManager-0 INFO curator.CuratorZookeeperClient: [DUBBO] Curator zookeeper client instance initiated successfully, session id is 100001a38dd0000, dubbo version: 3.0.4-SNAPSHOT, current host: 172.19.112.1 《== zk连接创建完毕 2021-10-08T07:35:39.2034461Z [08/10/21 07:35:39:199 UTC] main INFO zookeeper.ZookeeperTransporter: [DUBBO] No valid zookeeper client found from cache, therefore create a new client for url. ``` 因此正常情况下设置3秒连接超时也够用。 curator官方声明要兼容zk 3.4.13，需要用curator4.2.0，dubbo现在用的4.1.0。 ZooKeeper Version 3.4.x Compatibility https://curator.apache.org/zk-compatibility-34.html ZooKeeper 3.4.x is now at end-of-life. Consequently, the latest versions of Curator have removed support for it. If you wish to use Curator with ZooKeeper 3.4.x you should pin to version 4.2.x of Curator. Curator 4.2.x supports ZooKeeper 3.4.x ensembles in a soft-compatibility mode. To use this mode you must exclude ZooKeeper when adding Curator to your dependency management tool. Maven ``` <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-recipes</artifactId> <version>4.2.0</version> <exclusions> <exclusion> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> </exclusion> </exclusions> </dependency> ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
