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Near cache compatibility with 3.7 client is broken for TTL expirations #9674

ihsandemir opened this issue Jan 17, 2017 · 2 comments


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commented Jan 17, 2017

The following client test fails if the client if 3.7.4 and when it is run against 3.8-SNAPSHOT server. It passes when both client and server are 3.8-SNAPSHOT or 3.7.4.


import com.hazelcast.client.HazelcastClient;
import com.hazelcast.client.config.ClientConfig;
import com.hazelcast.config.NearCacheConfig;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IMap;
import com.hazelcast.test.AssertTask;
import com.hazelcast.test.HazelcastTestSupport;

import java.util.concurrent.TimeUnit;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

 * Created by ihsan on 17/01/17.
public class TTLTest {
    public static void main(String[] args) {
        int ttlTime = 2000; //msecs
        String mapName = "SomeMap";
        ClientConfig config = new ClientConfig();
        config.addNearCacheConfig(new NearCacheConfig(mapName));
        HazelcastInstance client = HazelcastClient.newHazelcastClient(config);
        final IMap<Object, Object> map = client.getMap(mapName);
        map.put(1, "value1", ttlTime, TimeUnit.MILLISECONDS);

        Object firstValue = map.get(1);
        System.out.println("First value:" + firstValue);
        assertEquals("value1", firstValue);

        try {
        } catch (InterruptedException e) {

        // trigger eviction
        Object secondValue = map.get(1);
        System.out.println("Second value:" + secondValue);

        HazelcastTestSupport.assertTrueAllTheTime(new AssertTask() {
            public void run()
                    throws Exception {
                Object value = map.get(1);
                System.out.println("Value is " + value);
                assertEquals("value1", value);
        }, 20);

        System.out.println("Test finished");


@ihsandemir ihsandemir added this to the 3.8 milestone Jan 17, 2017


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commented Jan 17, 2017

More info #9669


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commented Jan 19, 2017

hi @ihsandemir, do you know the root cause? Are you working on this?

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