@Test
  public void testFalsePositiveOnExceptionallyLongGCPause() {
    long[] interval = new long[] {sec, sec, sec};
    long gcPause = 15 * sec;
    List<AbstractHeartbeatSample> history = fromInterval(interval, gcPause + 2 * sec);
    Assert.assertTrue(fixedDetector.isAvailable(id, history));
    Assert.assertFalse(phiAccrualDetector.isAvailable(id, history));
  }
When the system load is high, we may observe exceptionally long GC pause The first
exceptionally long GC pause will be a false positive to Phi the GC pause is 15 (longer than the
expected 10s) Phi will report false positive
iotdb-core/confignode/src/test/java/org/apache/iotdb/confignode/manager/load/cache/detector/DetectorTest.java