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From "Aleksey Plekhanov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-11670) Java thin client: Queries are inconsistent in case of failover
Date Tue, 02 Apr 2019 12:42:02 GMT
Aleksey Plekhanov created IGNITE-11670:
------------------------------------------

             Summary: Java thin client: Queries are inconsistent in case of failover
                 Key: IGNITE-11670
                 URL: https://issues.apache.org/jira/browse/IGNITE-11670
             Project: Ignite
          Issue Type: Bug
          Components: thin client
            Reporter: Aleksey Plekhanov


When a thin client does failover and switches to a new server, open cursors become inconsistent
and silently returns the wrong result.

Reproducer:

{code:java}
    public void testQueryFailover() throws Exception {
        try (LocalIgniteCluster cluster = LocalIgniteCluster.start(1);
             IgniteClient client = Ignition.startClient(new ClientConfiguration()
                 .setAddresses(cluster.clientAddresses().iterator().next()))
        ) {
            ObjectName mbeanName = U.makeMBeanName(Ignition.allGrids().get(0).name(), "Clients",
                ClientListenerProcessor.class.getSimpleName());

            ClientProcessorMXBean mxBean = MBeanServerInvocationHandler.newProxyInstance(
                ManagementFactory.getPlatformMBeanServer(), mbeanName, ClientProcessorMXBean.class,
true);

            ClientCache<Integer, Integer> cache = client.createCache("cache");

            cache.put(0, 0);
            cache.put(1, 1);

            Query<Cache.Entry<Integer, String>> qry = new ScanQuery<Integer,
String>().setPageSize(1);

            try (QueryCursor<Cache.Entry<Integer, String>> cur = cache.query(qry))
{
                int cnt = 0;

                for (Iterator<Cache.Entry<Integer, String>> it = cur.iterator();
it.hasNext(); it.next()) {
                    cnt++;

                    if (cnt == 1)
                        mxBean.dropAllConnections();
                }

                assertEquals(2, cnt);
            }
        }
    }
{code}




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