code: @Override
      public void clearAllSchedulingData() throws JobPersistenceException {
          doWithLock(new LockCallbackWithoutResult() {
              @Override
              public Void doWithLock(JedisCommands jedis) throws JobPersistenceException {
                  try {
                      storage.clearAllSchedulingData(jedis);
                  } catch (ClassNotFoundException e) {
                      throw new JobPersistenceException("Could not clear scheduling data.");
                  }
                  return null;
              }
          }, "Could not clear scheduling data.");
      }
docs: Clear (delete!) all scheduling data - all {@link org.quartz.Job}s, {@link org.quartz.Trigger}s
  {@link org.quartz.Calendar}s.
  
  @throws org.quartz.JobPersistenceException