Hello, In case if your nodes don't see each other then try to check next:
1)That your IP finder configuration for every node contains the IP addresses of every AWS node from the cluster like next: <property name="discoverySpi"> <bean class="org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi"> <property name="ipFinder"> <bean class="org.apache.ignite.spi.discovery.tcp.ipfinder.vm.TcpDiscoveryVmIpFinder"> <property name="addresses"> <list> <value>178.0.0.1:47500..47501</value> <value>178.0.0.2:47500..47501</value> </list> </property> </bean> </property> </bean> </property> where 178.0.0.1 and 178.0.0.2 are AWS machines addresses. 2)Check you configurated the security group. It required because you should open TCP ports for Ignite communication. https://docs.aws.amazon.com/vpc/latest/userguide/VPC_SecurityGroups.html Example: Inbound: Custom TCP Rule TCP 10800 - 10900 0.0.0.0/0 client Custom TCP Rule TCP 47500 - 47600 0.0.0.0/0 discovery Custom TCP Rule TCP 47100 - 47200 0.0.0.0/0 communication Outbound: All traffic All All 0.0.0.0/0 All traffic All All ::/0 3)Check that ports is open in your operating system. For example, in windows, you should add new rules to the firewall to open ports (or disable the firewall) When all steps above will be done and all IP addresses and ports will be correct then your C# code will work as expected. BR, Andrei -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/