Apache Ignite connection between two nodes

Question

I've recently started to learn about Apache Ignite and I have a newbie question. I'm trying to create 2 ignite node (1 server node and 1 client). I successfully started server node, but when I try to start client node I'm getting an error:

[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)

I run server node on AIX with default configuration from Ignite 1.7.0 distr. And I run client node on Win7 with following configuration:

<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>

where 10.xxx.xxx.xxx is IP address of my AIX machine.

What's processor and it's Endianness on AIX machine? Ignite currently doesn't support communication between nodes that run on processor architectures with different Endianness. — Mitya XMitya
@Mitya thanks for the hint, processor on that AIX machine has big endian byte order — SKJS
@Mitya thanks for your help. I just can't understand why that's an issue, I thought Ignite runs inside platform-independece JVM and therefore should not rely on specific processor endianness — SKJS
This is because for speed purposes Ignite communication protocol uses native byte order, and for now it's not configurable. I don't know about plans to change this, but you may ask about it on user list: [email protected]. — Mitya XMitya

dmagda dmagda · Accepted Answer · 2017-09-12T21:42:40

Big Endian architecture was supported pretty decent time ago. Presently, Ignite automatically detects an underlying platform endianness and switches to specific modes of operation. As far as I remember, Apache Ignite community members confirmed that Ignite works on Solaris and Power PC.

Apache Ignite connection between two nodes

1 Answers