Apache-ignite Pojo for key - ignite

Question

I have apache-ignite running in a cluster with 3 nodes and populated it with some random data using a Long as the key.
IgniteCache<Long, String> cache = ignite.getOrCreateCache("myCache");
Map<Long, String> data = new HashMap<>();
data.put(1L,"Data for 1");
data.put(2L,"Data for 2");
cache.putAll(data);
for retrieval
Set<Long> keys = new HashSet<Long>(Arrays.asList(new Long[]{1L,2L}));
Map<Long,String> data = cache.getAll(keys);
data.forEach( (k,v) -> {
System.out.println(k+" "+v);
});
This all works great but when changing the key of the map to a POJO I am unable to retrieve the data...
IgniteCache<IdTimeStamp, String> cache = ignite.getOrCreateCache("myCache");
Map<IdTimeStamp, String> data = new HashMap<>();
data.put(new IdTimeStamp(1L, 1514759400000L),"Data for 1514759400000");
data.put(new IdTimeStamp(1L, 1514757600000L),"Data for 1514757600000L");
cache.putAll(data);
for retrieval
Set<IdTimeStamp> keys = new HashSet<IdTimeStamp>();
keys.add(new IdTimeStamp(1L, 1514757600000L));
keys.add(new IdTimeStamp(1L, 1514759400000L));
Map<IdTimeStamp,String> data = cache.getAll(keys);
System.out.println(data.size());
data.forEach( (k,v) -> {
System.out.println(k+" "+v);
});
and the IdTimeStamp class:
public class IdTimeStamp {
private Long id;
private Long timestamp;
public IdTimeStamp(Long id, Long timestamp) {
this.id = id;
this.timestamp = timestamp;
}
}

Answer 1

Not working:
ClientConfiguration cfg = new ClientConfiguration().setAddresses("127.0.0.1:10800");
IgniteClient client = Ignition.startClient(cfg);
ClientCache<IdTimeStamp, String> cache = client.cache("myCache");
Working:
public static IgniteCache<IdTimeStamp, String> getIgnite() {
IgniteConfiguration cfg = new IgniteConfiguration();
cfg.setClientMode(true);
cfg.setPeerClassLoadingEnabled(false); //true ??
// Setting up an IP Finder to ensure the client can locate the servers.
TcpDiscoveryMulticastIpFinder ipFinder = new TcpDiscoveryMulticastIpFinder();
ipFinder.setAddresses(Collections.singletonList("127.0.0.1:47500..47509"));
TcpDiscoverySpi discoverySpi = new TcpDiscoverySpi();
discoverySpi.setClientReconnectDisabled(true);
discoverySpi.setIpFinder(ipFinder);
cfg.setDiscoverySpi(discoverySpi);
// Starting the node
Ignite ignite = Ignition.start(cfg);
// Create an IgniteCache and put some values in it.
IgniteCache<IdTimeStamp, String> cache = ignite.getOrCreateCache("myCache");
return cache;
}

Answer 2

Looks like a known limitation when you are using different clients for data population and retrieving the records. Take a look at this question if configuring compactFooter=true solves that problem.
clientConfig.setBinaryConfiguration(new BinaryConfiguration().setCompactFooter(true)
Otherwise, your code looks fine and should work as expected.