@Test(timeout = 300_000)
  public void testMultiThreaded() throws Exception {

    // similar to TestDateColumnVector#testMultiThreaded

    List<Thread> threads = new ArrayList<>();

    threads.add(startVectorManipulationThread(50000, -141428));
    threads.add(startVectorManipulationThread(50000, -141430));
    threads.add(startVectorManipulationThread(50000, -16768));
    threads.add(startVectorManipulationThread(50000, -499952));
    threads.add(startVectorManipulationThread(50000, -499955));

    for (Thread thread : threads) {
      thread.join();
    }

  }
Test case for TimestampColumnVector's changeCalendar
  16768: hybrid: 2015-11-29 proleptic: 2015-11-29
-141418: hybrid: 1582-10-24 proleptic: 1582-10-24
-141427: hybrid: 1582-10-15 proleptic: 1582-10-15
-141428: hybrid: 1582-10-04 proleptic: 1582-10-14
-141430: hybrid: 1582-10-02 proleptic: 1582-10-12
-141437: hybrid: 1582-09-25 proleptic: 1582-10-05
-141438: hybrid: 1582-09-24 proleptic: 1582-10-04
-499952: hybrid: 0601-03-04 proleptic: 0601-03-07
-499955: hybrid: 0601-03-01 proleptic: 0601-03-04
storage-api/src/test/org/apache/hadoop/hive/ql/exec/vector/TestTimestampColumnVector.java