我最近开始了解Apache Ignite，我有一个新手问题。我正在尝试创建2个点燃节点（1个服务器节点和1个客户端）。我成功启动了服务器节点，但当我尝试启动客户端节点时，我收到一个错误：

[04:23:19,478][SEVERE][grid-nio-worker-0-#29%testGrid-client2%][TcpCommunicationSpi] Closing NIO session because of unhandled exception.
class org.apache.ignite.internal.util.nio.GridNioException: null
        at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.processSelectedKeysOptimized(GridNioServer.java:1595)
        at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.bodyInternal(GridNioServer.java:1516)
        at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.body(GridNioServer.java:1289)
        at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
        at org.apache.ignite.internal.util.nio.GridNioRecoveryDescriptor.ackReceived(GridNioRecoveryDescriptor.java:195)
        at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi$2.onMessage(TcpCommunicationSpi.java:559)
        at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi$2.onMessage(TcpCommunicationSpi.java:330)
        at org.apache.ignite.internal.util.nio.GridNioFilterChain$TailFilter.onMessageReceived(GridNioFilterChain.java:270)
        at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedMessageReceived(GridNioFilterAdapter.java:107)
        at org.apache.ignite.internal.util.nio.GridNioCodecFilter.onMessageReceived(GridNioCodecFilter.java:107)
        at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedMessageReceived(GridNioFilterAdapter.java:107)
        at org.apache.ignite.internal.util.nio.GridConnectionBytesVerifyFilter.onMessageReceived(GridConnectionBytesVerifyFilter.java:123)
        at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedMessageReceived(GridNioFilterAdapter.java:107)
        at org.apache.ignite.internal.util.nio.GridNioServer$HeadFilter.onMessageReceived(GridNioServer.java:2332)
        at org.apache.ignite.internal.util.nio.GridNioFilterChain.onMessageReceived(GridNioFilterChain.java:173)
        at org.apache.ignite.internal.util.nio.GridNioServer$DirectNioClientWorker.processRead(GridNioServer.java:918)
        at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.processSelectedKeysOptimized(GridNioServer.java:1583)
        ... 4 more
[04:23:19,495][SEVERE][grid-nio-worker-1-#30%testGrid-client2%][TcpCommunicationSpi] Closing NIO session because of unhandled exception.
class org.apache.ignite.internal.util.nio.GridNioException: null
        at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.processSelectedKeysOptimized(GridNioServer.java:1595)
        at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.bodyInternal(GridNioServer.java:1516)
        at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.body(GridNioServer.java:1289)
        at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
        at org.apache.ignite.internal.util.nio.GridNioRecoveryDescriptor.ackReceived(GridNioRecoveryDescriptor.java:195)
        at org.apache.ignite.internal.util.nio.GridNioRecoveryDescriptor.onHandshake(GridNioRecoveryDescriptor.java:278)
        at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi$2.connected(TcpCommunicationSpi.java:617)
        at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi$2.onFirstMessage(TcpCommunicationSpi.java:492)
        at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi$2.onMessage(TcpCommunicationSpi.java:540)
        at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi$2.onMessage(TcpCommunicationSpi.java:330)
        at org.apache.ignite.internal.util.nio.GridNioFilterChain$TailFilter.onMessageReceived(GridNioFilterChain.java:270)
        at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedMessageReceived(GridNioFilterAdapter.java:107)
        at org.apache.ignite.internal.util.nio.GridNioCodecFilter.onMessageReceived(GridNioCodecFilter.java:107)
        at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedMessageReceived(GridNioFilterAdapter.java:107)
        at org.apache.ignite.internal.util.nio.GridConnectionBytesVerifyFilter.onMessageReceived(GridConnectionBytesVerifyFilter.java:113)
        at org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedMessageReceived(GridNioFilterAdapter.java:107)
        at org.apache.ignite.internal.util.nio.GridNioServer$HeadFilter.onMessageReceived(GridNioServer.java:2332)
        at org.apache.ignite.internal.util.nio.GridNioFilterChain.onMessageReceived(GridNioFilterChain.java:173)
        at org.apache.ignite.internal.util.nio.GridNioServer$DirectNioClientWorker.processRead(GridNioServer.java:918)
        at org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.processSelectedKeysOptimized(GridNioServer.java:1583)

我使用Ignite 1.7.0发行版的默认配置在AIX上运行服务器节点。我使用以下配置在Win7上运行客户端节点：

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
        <bean id="ignite.cfg" class="org.apache.ignite.configuration.IgniteConfiguration">
                    <property name="gridName" value="testGrid-client2"/>
                    <property name="clientMode" value="true"/>
                    <!--<property name="peerClassLoadingEnabled" value="true"/>-->
                    <property name="discoverySpi">
                               <bean class="org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi">
                                           <property name="ipFinder">
                                                       <bean class="org.apache.ignite.spi.discovery.tcp.ipfinder.multicast.TcpDiscoveryMulticastIpFinder">
                                                                   <property name="addresses">
                                                                               <list>
                                                                                          <value>10.xxx.xxx.xxx:47500..47509</value>
                                                                              </list>
                                                                   </property>
                                                       </bean>
                                           </property>


        </bean>

其中10.xxxx.xxx。xxx是AIX计算机的IP地址。