Java连接Zookeeper服务器出现KeeperErrorCode = ConnectionLoss for /liwei

在上一周做Zookeeper服务器搭建出现了一个问题，如下：

org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /liwei

  at org.apache.zookeeper.KeeperException.create(KeeperException.java:102)
  at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
  at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:2021)
  at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:2049)
  at com.liwei.zkDemo.zkAPI.zkApiTest.zkApiTest(zkApiTest.java:47)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
  at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
  at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
  at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
  at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
  at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
  at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
  at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
  at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
  at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
  at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
  at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
  at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
  at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
  at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
  at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
  at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
  at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
  at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

自己研究了下也查询了网上的各种资料，无非就大致以下情况：

1.加了端口（要我们去掉端口）

2.jar包版本不一致造成的

3.关闭防火墙

4.加内存

以上方法一一试了一遍还是一样，依然报错。最后无意修改了sessionTimeout这个参数的连接时间就可以了。

//1.创建zookeeper连接
        ZooKeeper zooKeeper = new ZooKeeper("192.168.168.131", 20000, new Watcher() {
            public void process(WatchedEvent watchedEvent) {
                System.out.println("触发了" + watchedEvent.getType() + "事件");
            }
        });

总结：网上答案大同小异，还是实践出真理！