@After
  public void reset() {
    VMProvider.invokeInEveryMember(() -> {
      DefaultQuery.testHook = null;
      GemFireCacheImpl.MAX_QUERY_EXECUTION_TIME = -1;
    }, server1, server2);
  }
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