无法使用apache .NET库从C#应用程序连接到ZooKeeper

Question

我正在使用在ubuntu vm上运行的Zookeeper v3.3.3 + dfsg2-1ubuntu1.(VM正在使用NAT网络连接运行)

在我的开发机器(Windows 7)上,如果我运行:zkCli.cmd -server 10.10.135.19:2181它连接正常,我可以执行creates,gets等.

我有一个C#4应用程序,它对Org.Apache.ZooKeeper v1.0.0.0具有NuGet依赖性.

我通过以下方式使用它:

  class watcher : IWatcher
  {
     private readonly ManualResetEventSlim _connected = new ManualResetEventSlim(false);
     private WatchedEvent _event;

     public void WaitUntilConnected()
     {
        _connected.Wait();

        if (_event == null) throw new ApplicationException("bad state");
        if (_event.State != KeeperState.SyncConnected)
           throw new ApplicationException("cannot connect");
     }

     public void Process(WatchedEvent @event)
     {
        _event = @event;
        _connected.Set();
     }
  }

  ...

  public void TestZooKeeper()
  {
     _countdownWatcher = new watcher();
     _zk = new ZooKeeper(
        Settings.Default.ZookeeperConnectionString, // 10.10.135.19:2181
        new TimeSpan(Settings.Default.ZookeeperConnectionTimeout), // 10000
        _countdownWatcher);
     _countdownWatcher.WaitUntilConnected();
  }

问题是,这只是挂起.在zookeeper日志中,我看到以下内容:

2012-04-05 08:12:21,376 - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn$Factory@251] - Accepted socket         connection from /10.0.2.2:51057
2012-04-05 08:12:21,379 - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@777] - Client attempting to establish new session at /10.0.2.2:51057
2012-04-05 08:12:21,383 - INFO  [SyncThread:0:NIOServerCnxn@1580] - Established session 0x1367c91bf580047 with negotiated timeout 4000 for client /10.0.2.2:51057
2012-04-05 08:12:22,500 - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn$Factory@251] - Accepted socket connection from /10.0.2.2:51059
2012-04-05 08:12:22,502 - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@777] - Client attempting to establish new session at /10.0.2.2:51059
2012-04-05 08:12:22,505 - INFO  [SyncThread:0:NIOServerCnxn@1580] - Established session 0x1367c91bf580048 with negotiated timeout 4000 for client /10.0.2.2:51059
2012-04-05 08:12:26,000 - INFO  [SessionTracker:ZooKeeperServer@314] - Expiring session 0x1367c91bf580047, timeout of 4000ms exceeded
2012-04-05 08:12:26,001 - INFO  [ProcessThread:-1:PrepRequestProcessor@387] - Processed session termination for sessionid: 0x1367c91bf580047
2012-04-05 08:12:26,004 - INFO  [SyncThread:0:NIOServerCnxn@1435] - Closed socket connection for client /10.0.2.2:51057 which had sessionid 0x1367c91bf580047
2012-04-05 08:12:28,001 - INFO  [SessionTracker:ZooKeeperServer@314] - Expiring session 0x1367c91bf580048, timeout of 4000ms exceeded
2012-04-05 08:12:28,002 - INFO  [ProcessThread:-1:PrepRequestProcessor@387] - Processed session termination for sessionid: 0x1367c91bf580048
2012-04-05 08:12:28,004 - INFO  [SyncThread:0:NIOServerCnxn@1435] - Closed socket connection for client /10.0.2.2:51059 which had sessionid 0x1367c91bf580048

并且这一直持续到我手动终止该过程,即该WaitUntilConnected()方法永远不会返回.(通过调试验证)

似乎客户端连接到达服务器正常,但Watcher从未意识到这一点,该通道上没有任何进一步发生,服务器终止连接,只有客户端才能重试.我在这里做错了什么想法？

Answer 1

事实证明,ZooKeeper的C#客户端库的规范版本位于https://github.com/ExactTargetDev/zookeeper/tree/et-develop,这与ZooKeeper wiki指向的不同.

• 通过从github获取源来构建源代码.确保获得et-develop分支机构.
• ant在顶级运行(此调用jute,生成在C#项目中使用的RPC类)
• src/dotnet在那里打开文件夹和解决方案
• 建立它

我运行了与我当地的ZooKeeper连接的单元测试,它们运行良好.