HP 40Gb Switch using 3rd party transceiver

If you are using 3rd party transceiver on HP switches, there will be an error like this:

%Jun 13 08:36:03:036 2017 lonsw-40g OPTMOD/5/TX_ALM_ON: Ten-GigabitEthernet1/0/5:2: TX_fault detected!
%Jun 13 08:36:04:174 2017 lonsw-40g OPTMOD/5/TX_ALM_OFF: Ten-GigabitEthernet1/0/5:2: TX_fault removed.

If the transceiver works, you can turn off the error so that it won't show on console:
undo info-center source OPTMOD logbuffer