@Test
  public void testCqExecuteDoesNotGetAffectedByTimeout() throws Exception {
    // uninstall the test hook installed in @Before
    VMProvider.invokeInEveryMember(() -> {
      DefaultQuery.testHook = null;
    }, server1, server2);

    gfsh.executeAndAssertThat("create region --name=exampleRegion --type=REPLICATE")
        .statusIsSuccess();
    locator.waitUntilRegionIsReadyOnExactlyThisManyServers(SEPARATOR + "exampleRegion", 2);
    server1.invoke(() -> populateRegion(0, 100));

    int server1Port = server1.getPort();
    client3 = cluster.startClientVM(3, new Properties(), ccf -> {
      configureClientCacheFactory(ccf, server1Port);
    });

    client3.invoke(() -> {
      String cqName = "testCQForQueryMonitorDUnitTest";
      String query = "select * from " + SEPARATOR + "exampleRegion";
      // Get CQ Service.
      QueryService cqService = ClusterStartupRule.getClientCache().getQueryService();

      // Create CQ Attributes.
      CqAttributesFactory cqf = new CqAttributesFactory();
      CqListener[] cqListeners = {new CqQueryTestListener(LogWriterUtils.getLogWriter())};
      cqf.initCqListeners(cqListeners);
      CqAttributes cqa = cqf.create();

      CqQuery cq1 = cqService.newCq(cqName, query, cqa);
      cq1.execute();
    });

    server1.invoke(() -> {
      populateRegion(0, 150);
    });
  }
These tests add a test hook to make sure query execution sleeps for at least 20 ms, so the
queryMonitor thread will get a chance to cancel the query before it completes.

The MAX_QUERY_EXECUTION_TIME is set as 1 ms, i.e, theoretically all queries will be cancelled
after 1ms, but due to thread scheduling, this may not be true. we can only decrease the flakyness
of the test by making MAX_QUERY_EXECUTION_TIME the smallest possible (1) and making the query
execution time longer (but not too long to make the test run too slow).
geode-cq/src/distributedTest/java/org/apache/geode/cache/query/dunit/QueryMonitorDUnitTest.java