diff --git a/Operation-timed-out,是版本的问题吗？.md b/Operation-timed-out,是版本的问题吗？.md
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+hi，
+
+
+我使用了server－V1.0.22最新版、client－V1.0.21 仓库取的依赖jar出现了莫名的超时问题，我的zookeeper其他应用支持的很好`zkServer=cdh3:2181,cdh1:2181,cdh5:2181` 。
+
+**使用zookeeper调度出现超时现象，clinet一直联不通**, 用Simple方式就没有问题，超时抛的错误如下。
+
+`[2016-03-24 19:58:27] ERROR [ZkClient-EventThread-13-cdh3:2181,cdh1:2181,cdh5:2181] ZkEventThread - Error handling event ZkEvent[Data of /otter/canal/destinations/user/1001/running changed sent to com.alibaba.otter.canal.client.impl.running.ClientRunningMonitor$1@45681b65]
+com.alibaba.otter.canal.protocol.exception.CanalClientException: java.net.ConnectException: Operation timed out
+	at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.doConnect(SimpleCanalConnector.java:167)
+	at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.access$000(SimpleCanalConnector.java:48)
+	at com.alibaba.otter.canal.client.impl.SimpleCanalConnector$1.processActiveEnter(SimpleCanalConnector.java:392)
+	at com.alibaba.otter.canal.client.impl.running.ClientRunningMonitor.processActiveEnter(ClientRunningMonitor.java:188)
+	at com.alibaba.otter.canal.client.impl.running.ClientRunningMonitor.initRunning(ClientRunningMonitor.java:110)
+	at com.alibaba.otter.canal.client.impl.running.ClientRunningMonitor$1.handleDataDeleted(ClientRunningMonitor.java:67)
+	at org.I0Itec.zkclient.ZkClient$6.run(ZkClient.java:549)
+	at org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:71)
+Caused by: java.net.ConnectException: Operation timed out
+	at sun.nio.ch.Net.connect0(Native Method)
+	at sun.nio.ch.Net.connect(Net.java:458)
+	at sun.nio.ch.Net.connect(Net.java:450)
+	at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
+	at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.doConnect(SimpleCanalConnector.java:128)
+	... 7 more` 
+
+
+debug到BooleanMutex这个类,没发同步导致超时的，具体原因没有找到：
+
+
+`
+public void get() throws InterruptedException {
+        this.sync.innerGet();
+    }
+`
+
+后来把server换成V1.0.21还是不行。 是不是在zk里保留了版本不兼容的信息。 是21client不能配合22的server吗？ 谢谢。
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