通过Java API获取ZooKeeper服务器版本
[英]Getting ZooKeeper server version via Java API
问题描述
I'm finding that some Apache Curator recipes don't work with older versions of ZooKeeper. 
我发现某些Apache Curator食谱不适用于较旧版本的ZooKeeper。 This isn't an issue except that I keep having developers in my company try to use some code I wrote and it fails without any errors or log messages due to them running an old version of their local machine. 这不是问题，除了我一直在公司中让开发人员尝试使用我编写的某些代码，并且由于他们运行的是本地计算机的旧版本而失败时，没有任何错误或日志消息。 So I want to retrive the version of the ZooKeeper server to which I'm connected and die with an useful error message if the version is too old. 因此，我想检索我连接到的ZooKeeper服务器的版本，如果版本太旧，则会显示一条有用的错误消息，以使其消失。 However, I can't find any way to get the server's version number with either the Curator or ZooKeeper APIs. 但是，我找不到使用Curator或ZooKeeper API获取服务器版本号的任何方法。 Anyone know how to do it? 有人知道怎么做吗？
1 个解决方案
解决方案1
0 已采纳 2014-05-05 17:31:29
The ZooKeeper "four letter words" can help. ZooKeeper的“四个字母单词”可以提供帮助。 You can connect to the local ZK instance on port 2181 and execute a "srvr" four letter word. 您可以在端口2181上连接到本地ZK实例，并执行“ srvr”四个字母的单词。 You'll get back lines of info one of which is the version. 您将获得信息行，其中之一是版本。
Have a look at Exhibitor's FourLetterWord class for a sample of how to get this programmatically: https://github.com/Netflix/exhibitor/blob/40a02452dc3133fe37bf4ecf076bda99c29ab6ec/exhibitor-core/src/main/java/com/netflix/exhibitor/core/state/FourLetterWord.java 请查看参展商的FourLetterWord类，以获取如何以编程方式获取此示例的示例： https : //github.com/Netflix/exhibitor/blob/40a02452dc3133fe37bf4ecf076bda99c29ab6ec/exhibitor-core/src/main/java/com/netflix/exhibitor/core /state/FourLetterWord.java
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