有人知道为什么会出现这个错误吗？。。。该代码以前可以工作，但现在它在我的系统中不工作，但在其他系统中成功地工作。错误日志如下。。。请帮帮我。。。
我认为可能有任何版本不兼容。。。但我不知道到底是什么？。。。

12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.3.1-942149, built on 05/07/2010 17:14 GMT
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:host.name=User-PC
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:java.version=1.7.0
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Oracle Corporation
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:java.home=C:\Program Files\Java\jdk1.7.0\jre
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:java.class.path=D:\apache-tomcat-7.0.30\bin\bootstrap.jar;D:\apache-tomcat-7.0.30\bin\tomcat-juli.jar
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:java.library.path=C:\Program Files\Java\jdk1.7.0\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\TortoiseSVN\bin;D:\apache-maven-3.0.4\bin;.
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=D:\apache-tomcat-7.0.30\temp
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:java.compiler=<NA>
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:os.name=Windows 7
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:os.arch=x86
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:os.version=6.1
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:user.name=User
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:user.home=C:\Users\User
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Client environment:user.dir=D:\apache-tomcat-7.0.30\bin
    12/10/18 14:21:59 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=192.168.1.240:2222 sessionTimeout=180000 watcher=hconnection
    12/10/18 14:21:59 INFO zookeeper.ClientCnxn: Opening socket connection to server /192.168.1.240:2222
    12/10/18 14:22:00 INFO zookeeper.ClientCnxn: Socket connection established to JAI-3/192.168.1.240:2222, initiating session
    12/10/18 14:22:00 INFO zookeeper.ClientCnxn: Session establishment complete on server JAI-3/192.168.1.240:2222, sessionid = 0x13a6d1375aa0244, negotiated timeout = 40000
    12/10/18 14:22:02 ERROR hbase.HServerAddress: Could not resolve the DNS name of slave1
    java.lang.IllegalArgumentException: hostname can't be null
    Error while establishing connection to HBASE
        at java.net.InetSocketAddress.<init>(InetSocketAddress.java:139)
        at org.apache.hadoop.hbase.HServerAddress.getResolvedAddress(HServerAddress.java:108)
        at org.apache.hadoop.hbase.HServerAddress.<init>(HServerAddress.java:64)
        at org.apache.hadoop.hbase.MasterAddressTracker.getMasterAddress(MasterAddressTracker.java:63)
        at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getMaster(HConnectionManager.java:354)
        at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:94)
        at com.wlu.orm.hbase.connection.HBaseConnection.<init>(HBaseConnection.java:28)
        at com.project.common.HBaseConnectionWrapper.<init>(HBaseConnectionWrapper.java:31)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:110)
        at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:280)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1035)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:939)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
        at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:650)
        at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1582)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)