Apache ignite: Disable peer class loading - spring-boot

Question

I am trying to connect to a Apache Ignite Server from a Spring Boot Application.
Example code:
ClientConfiguration cfg = new ClientConfiguration().setAddresses("127.0.0.1:10800");
try (IgniteClient client = Ignition.startClient(cfg)) {
Object cachedName = client.query(
new SqlFieldsQuery("SELECT name from Person WHERE id=?").setArgs("foo").setSchema("PUBLIC")
).getAll().iterator().next().iterator().next();
}
I get this error:
Caused by: class org.apache.ignite.IgniteCheckedException: Remote node
has peer class loading enabled flag different from local
[locId8=459833a1, locPeerClassLoading=true, rmtId8=83ea88ca,
rmtPeerClassLoading=false,
rmtAddrs=[ignite-0.ignite.default.svc.cluster.local/0:0:0:0:0:0:0:1%lo,
/10.4.2.49, /127.0.0.1], rmtNode=ClusterNode
[id=83ea88ca-da77-4887-9357-267ac7397767, order=1,
addr=[0:0:0:0:0:0:0:1%lo, 10.x.x.x, 127.0.0.1], daemon=false]]
So the PeerClassLoading needs to be deactivated in my Java code. How can I do that?

Answer 1

As noted in the comments, the error is from a thick client (or another server) connecting to the cluster but the code is from a thin client.
If you’re just reading/writing data and don’t need to execute code, the thin client is a perfectly good option.
To use a thick client, you need to make sure both the thick client and server have the same peer-class loading configuration. That would be either:
<property name=“peerClassLoadingEnabled” value=“false” />
in your Spring configuration file. Or:
IgniteConfiguration cfg = new IgniteConfiguration()
...
.setPeerClassLoadingEnabled(false);
(I’ve used false here as that’s your current server configuration. Having said that, you probably want it to be switched on.)