Here is the log when I try to do that:
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Fri Feb 10 13:23:19 2017: ERROR: Cannot lock down 82274202 byte memory area (Cannot allocate memory)
Fri Feb 10 13:23:19 2017: Acquired audio card Audio2
Fri Feb 10 13:23:19 2017: creating alsa driver ... hw:USB,0|hw:USB,0|1024|3|44100|2|2|nomon|swmeter|-|32bit
Fri Feb 10 13:23:19 2017: configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 3 periods
Fri Feb 10 13:23:19 2017: ALSA: final selected sample format for capture: 24bit little-endian in 3bytes format
Fri Feb 10 13:23:19 2017: ALSA: use 3 periods for capture
Fri Feb 10 13:23:19 2017: ALSA: final selected sample format for playback: 24bit little-endian in 3bytes format
Fri Feb 10 13:23:19 2017: ALSA: use 3 periods for playback
Fri Feb 10 13:23:19 2017: ERROR: Cannot use real-time scheduling (RR/85)(1: Operation not permitted)
Fri Feb 10 13:23:19 2017: ERROR: AcquireSelfRealTime error
Fri Feb 10 13:23:19 2017: graph reorder: new port 'system:capture_1'
Fri Feb 10 13:23:19 2017: New client 'system' with PID 0
Fri Feb 10 13:23:19 2017: graph reorder: new port 'system:capture_2'
Fri Feb 10 13:23:19 2017: graph reorder: new port 'system

layback_1'
Fri Feb 10 13:23:19 2017: graph reorder: new port 'system

layback_2'
Fri Feb 10 13:23:19 2017: New client 'cadence-aloop-daemon' with PID 2814
Fri Feb 10 13:23:19 2017: New client 'jack2alsa' with PID 2820
Fri Feb 10 13:23:19 2017: New client 'alsa2jack' with PID 2819
Fri Feb 10 13:23:19 2017: ERROR: Cannot write socket fd = 14 err = Broken pipe
Fri Feb 10 13:23:19 2017: ERROR: CheckRes error
Fri Feb 10 13:23:19 2017: ERROR: Could not write notification
Fri Feb 10 13:23:19 2017: ERROR: ClientNotify fails name = alsa2jack notification = 0 val1 = 0 val2 = 0
Fri Feb 10 13:23:19 2017: ERROR: NotifyAddClient old_client fails name = jack2alsa
Fri Feb 10 13:23:19 2017: Client 'jack2alsa' with PID 2820 is out
Fri Feb 10 13:23:19 2017: ERROR: Cannot write socket fd = 16 err = Broken pipe
Fri Feb 10 13:23:19 2017: ERROR: CheckRes error
Fri Feb 10 13:23:19 2017: ERROR: Could not write notification
Fri Feb 10 13:23:19 2017: ERROR: ClientNotify fails name = jack2alsa notification = 1 val1 = 0 val2 = 0
Fri Feb 10 13:23:19 2017: Client 'alsa2jack' with PID 2819 is out
Fri Feb 10 13:23:20 2017: ERROR: Unknown source port in attempted (dis)connection src_name [alsa2jack:capture_1] dst_name [system

layback_1]
Fri Feb 10 13:23:20 2017: ERROR: Unknown source port in attempted (dis)connection src_name [alsa2jack:capture_2] dst_name [system

layback_2]
Fri Feb 10 13:23:21 2017: ERROR: Unknown destination port in attempted (dis)connection src_name [system:capture_1] dst_name [jack2alsa

layback_1]
Fri Feb 10 13:23:21 2017: ERROR: Unknown destination port in attempted (dis)connection src_name [system:capture_2] dst_name [jack2alsa

layback_2]