无法连接到AWS EC2上的Apache Ignite群集-Ignite服务器拒绝客户端

Question

I have problems with connecting to my Ignite cluster. I have 2 nodes on AWS EC2 and I use AWS S3 based discovery. Ignites nodes start without errors and I see how new objects appear at S3 bucket after launching Ignite. In AWS Securuty groups I opened all TCP ports so that it is expected that anyone can connect to the cluster.

But I get org.apache.ignite.client.ClientConnectionException: Ignite cluster is unavailable exception when I try to connect from my computer (I try to run simple JUnit tests from IDE).

I used the following configuration:

    <property name="addressResolver">
        <bean class="org.apache.ignite.configuration.BasicAddressResolver">
            <constructor-arg>
                <map>
                    <entry key="EC2 internal IP" value="EC2 public ip"/>
                </map>
            </constructor-arg>
        </bean>
    </property>

    <property name="discoverySpi">
        <bean class="org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi">
            <property name="ipFinder">
                <bean class="org.apache.ignite.spi.discovery.tcp.ipfinder.s3.TcpDiscoveryS3IpFinder">
                    <property name="awsCredentials" ref="reference to another bean with aws creds"/>
                    <property name="bucketName" value="MY_BUCKET_NAME"/>
                </bean>
            </property>
        </bean>
    </property>

The problem here is that server rejects any attempts to connect, because when I start Ignite client (not Thin client) I see at logs the following picture:

As you can see, the number of clients become equal to 0 then 1, 0 and 1 and etc. So I suppose, clients can reach the cluster, but why are they being rejected?

Answer 1

I solved this problem. It seems there is a rule: If you use AWS S3 based discovery in your Ignite cluster, your Ignite client nodes should use the same approach as well. It wasn't obvious for me.

According to the official documentation :

TcpDiscoverySpi spi = new TcpDiscoverySpi();

BasicAWSCredentials creds = new BasicAWSCredentials("yourAccessKey", "yourSecreteKey");

TcpDiscoveryS3IpFinder ipFinder = new TcpDiscoveryS3IpFinder();
ipFinder.setAwsCredentials(creds);
ipFinder.setBucketName("yourBucketName");