ceilometer alarm-history should throw error when alarm id is invalid

when I execute 'ceilometer alarm-histoy' command with invalid alarm-id '123' error is not thrown whereas when I use the same
alarm id with 'ceilometer alarm-show ' command an error is thrown.

$ ceilometer alarm-list
+--------------------------------------+--------+-------------------+----------+---------+------------+---------------------------------+------------------+
| Alarm ID | Name | State | Severity | Enabled | Continuous | Alarm condition | Time constraints |
+--------------------------------------+--------+-------------------+----------+---------+------------+---------------------------------+------------------+
| 20369539-e6df-428d-b5c1-f5a4da40a4e6 | cpu-hi | insufficient data | low | True | False | cpu_util > 50.0 during 2 x 120s | None |
+--------------------------------------+--------+-------------------+----------+---------+------------+---------------------------------+------------------+

$ ceilometer alarm-history 123
+------+-----------+--------+
| Type | Timestamp | Detail |
+------+-----------+--------+
+------+-----------+--------+

but if we execute alarm-show command with id "123"

dev@vyom:~$ ceilometer alarm-show 123
Alarm 123 not found (HTTP 404) (Request-ID: req-a72c4a50-90f6-4714-87c4-95555ab4f1e9)

I think appropriate error should be thrown when invalid alarm ID is provided as an argument to 'ceilometer alarm-history ' command .