在CentOS7.2的服务器上，运行着运行着就发现抛出了ConnectException，提示连接异

在CentOS7.2的服务器上，运行着运行着就发现抛出了ConnectException，提示连接异常。请问这个是哪部分出了问题？

[2017-06-02 17:01:03.295] [ERROR] [ZkClient-EventThread-20-10.10.10.81:2181,10.10.10.82:2181,10.10.10.33:2181] [c.a.o.c.client.impl.running.ClientRunningMonitor] >>> There is an error when execute initRunning method, with destination [db10101067002]. com.alibaba.otter.canal.protocol.exception.CanalClientException: java.net.ConnectException: Connection timed out at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.doConnect(SimpleCanalConnector.java:171) ~[canal.client-1.0.23.jar:na] at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.access$000(SimpleCanalConnector.java:48) ~[canal.client-1.0.23.jar:na] at com.alibaba.otter.canal.client.impl.SimpleCanalConnector$1.processActiveEnter(SimpleCanalConnector.java:396) ~[canal.client-1.0.23.jar:na] at com.alibaba.otter.canal.client.impl.running.ClientRunningMonitor.processActiveEnter(ClientRunningMonitor.java:207) ~[canal.client-1.0.23.jar:na] at com.alibaba.otter.canal.client.impl.running.ClientRunningMonitor.initRunning(ClientRunningMonitor.java:118) ~[canal.client-1.0.23.jar:na]

原提问者GitHub用户