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Posted to notifications@dubbo.apache.org by "BellaJiangxia (GitHub)" <gi...@apache.org> on 2018/11/01 06:27:35 UTC
[GitHub] [incubator-dubbo] BellaJiangxia opened issue #2723: zookeeper客户端watcher
可以通过命令的形式在客户端建立watcher吗？然后监控服务器的挂掉与否？
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
![Uploading T]3MJK}XKL%{7K0Q{9F1UM7.png…]()
我看网上的代码，这个groupNode和subNode这两个变量是需要通过图二这种方式在命令行创建吗
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
建议你看看zk client的文档和用法，或者你可以到zk去提交一个issue。
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
图上是用命令，实际操作也可以用代码，你可以看一下ZkclientZookeeperClient代码。
watcher就是监听器，你可以理解为Consumer订阅了一个zk的path，就会注册一个watcher，这个path下就是相应服务的Provider地址，如果新增一个Provider，他就会在这个path下加一条数据，这时候zk会把“在这个path下增加数据”这个事件通知给Consumer，其实就是回调Watcher的方法，这时候Consumer就可以处理相应的事件
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[GitHub] [incubator-dubbo] carryxyh closed issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
[ issue closed by carryxyh ]
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
https://github.com/apache/zookeeper
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
目前不行。
监控服务器健康状况使用telnet或者dubbo-ops即可
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
是的。
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
String createPath = zk.create("/"+groupNode+"/"+subNode,address.getBytes("utf-8"), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL);
System.out.println("create:"+createPath);
这段代码错了吗？为啥失败了呢，我用的命令式参数
![Uploading (DL7TG~%739K1Z7XI(7W1_N.png…]()
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
提问地址是什么呢？还不太会用这个git
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
你好，zookeeper没人回复，请问你知道为啥要创建子节点吗，直接创建节点不行吗，还有即使客户端能获得子节点的状态了，但是修改子节点完全没有反应
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
我只是学习，那客户端不监控服务端的宕机与否，那这个watcher机制有啥用呢
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
目前不行。
监控服务器健康状况使用telnet或者dubbo-ops即可
还有其他问题么？
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
我看网上说建立watcher首先要在服务端注册，是用命令注册还是怎么的
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
是真的不知道####......
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
不是，怎么提问的，我都不知道怎么提问了
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
哦哦，那我那两个图片的问题
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
订阅一下邮件列表，然后发邮件问一下吧
https://zookeeper.apache.org/lists.html
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
不是。下线可以理解为服务端主动操作关机，宕机可以理解为被动关闭比如电源被拔了。
watcher就是服务端主动下线的时候通知客户端使用。
这个问题跟dubbo没有什么关系，我先关闭了，如果你有疑问可以继续在下面留言进行讨论。
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
除了你说的这两种方式，还有就是在Java代码里面进行监控吗
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
这个就是在执行那个创建节点的流程吗
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
watcher机制是通知用的。通知客户端服务端下线，这和监控是两回事。
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
我看网上的代码，这个groupNode和subNode这两个变量是需要通过图二这种方式在命令行创建吗
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
我还不知道这个watcher整个流程到底怎么实现
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] carryxyh commented on issue #2723: zookeeper客户端watcher
Posted by "carryxyh (GitHub)" <gi...@apache.org>.
你想在客户端监听服务端健康情况么？
你能说一下你的业务场景么，我从来没遇到这种需求，我觉得很奇怪，客户端为什么要监控服务端的健康情况呢，服务端宕机，客户端直接就所有请求都会失败，怎么还需要监控呢？
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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[GitHub] [incubator-dubbo] BellaJiangxia commented on issue #2723: zookeeper客户端watcher
Posted by "BellaJiangxia (GitHub)" <gi...@apache.org>.
不太理解，下线和宕机不是一个意思吗
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2723 ]
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