docs: @SuppressFBWarnings(value = "VO_VOLATILE_INCREMENT",
        justification = "False Positive")
    private void advanceEpoch() {
      awaitBgPropagationTermination();
      startEagerPropagation();
      ConcurrentPropagationService.resetExecutorService(Thread.currentThread().getId());
      //noinspection NonAtomicOperationOnVolatileField
      // this increment of a volatile field is done within the scope of the propagation
      // synchronization and hence is done by a single thread
      // Ignore a FindBugs warning
      epoch_++;
      endPropagation(null, true);
      initBgPropagationService();
    }