ntp: client_stratum_selection: Fails to select lowest stratum sometimes #1361
Description
Current Behavior
TOPOLOGY=/etc/infamy-styx.dot TEST_MODE=host make test-sh
export PYTHONHASHSEED=3124318344
while [ $? -eq 0 ]; do ./9pm/9pm.py -a ./case/ntp/client_stratum_selection/test.py ; done
2026-01-21 08:26:04 7..7
o Execution
`-- o 0001 test.py
9PM - Simplicity is the ultimate sophistication (0cea38dc1e)
Testing Infix (3191306a5af6)
Starting test 0001 test.py (../case/ntp/client_stratum_selection/test.py)
2026-01-21 08:26:04 # Starting (2026-01-21 08:26:04)
2026-01-21 08:26:04 # host: monza
2026-01-21 08:26:04 # mgmt1: sw1p4
2026-01-21 08:26:04 # srv1: sw1p8
2026-01-21 08:26:04 # mgmt2: sw1p2
2026-01-21 08:26:04 # srv2: styx4
2026-01-21 08:26:04 # mgmt: e28
2026-01-21 08:26:04 # swp1: e27
2026-01-21 08:26:04 # swp2: e17
2026-01-21 08:26:04 # client: styx2
2026-01-21 08:26:04 # eth0: e17
2026-01-21 08:26:04 # mgmt: e28
2026-01-21 08:26:04 #
2026-01-21 08:26:04 # Waiting for DUTs to become reachable...
2026-01-21 08:26:04 # Probing styx4 on port sw1p4 for IPv6LL mgmt address ...
2026-01-21 08:26:04 # Testing using RESTCONF
2026-01-21 08:26:05 # YANG models downloaded.
2026-01-21 08:26:07 # Waiting for DUTs to become reachable...
2026-01-21 08:26:08 # Probing styx2 on port sw1p2 for IPv6LL mgmt address ...
2026-01-21 08:26:08 # Testing using RESTCONF
2026-01-21 08:26:08 # YANG models downloaded.
2026-01-21 08:26:10 ok 1 - Set up topology and attach to devices
2026-01-21 08:26:12 ok 2 - Configure srv2 to sync from srv1 and serve with higher stratum
2026-01-21 08:26:17 ok 3 - Wait for srv2 to sync from srv1
2026-01-21 08:26:19 ok 4 - Configure client to sync from both servers
2026-01-21 08:26:19 ok 5 - Wait for client to see both servers
2026-01-21 08:26:25 # srv1 and srv2 stratums verified as different
2026-01-21 08:26:25 ok 6 - Wait for srv2 stratum to stabilize
2026-01-21 08:29:06 # DEBUG: Failed to select srv1. Source details:
2026-01-21 08:29:06 # 192.168.1.1: stratum=1, state=candidate, poll=6, offset=None
2026-01-21 08:29:06 # 192.168.1.2: stratum=2, state=selected, poll=6, offset=None
2026-01-21 08:29:06 not ok 7 - Verify client selects srv1 (lower stratum)
2026-01-21 08:29:06 # Exiting (2026-01-21 08:29:06)
2026-01-21 08:29:06 # Traceback (most recent call last):
2026-01-21 08:29:06 # File "/home/lazzer/infix/test/./case/ntp/client_stratum_selection/test.py", line 161, in <module>
2026-01-21 08:29:06 # selected = until(srv1_selected, attempts=120)
2026-01-21 08:29:06 # ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-01-21 08:29:06 # File "/home/lazzer/infix/test/infamy/util.py", line 48, in until
2026-01-21 08:29:06 # raise Exception("Expected condition did not materialize")
2026-01-21 08:29:06 # Exception: Expected condition did not materialize
2026-01-21 08:29:06 #
test error, no plan
Aborting execution
x Execution
When failing:
admin@client:/> show ntp source
MS Name/IP address Stratum Poll Reach LastRx Last sample
^+ 192.168.1.1 1 6 077 122 +27us +/- 2.930ms
^* 192.168.1.2 2 6 177 57 -13us +/- 3.147ms
admin@client:/>
When succeeding:
admin@client:/> show ntp source
MS Name/IP address Stratum Poll Reach LastRx Last sample
^* 192.168.1.1 1 6 007 3 +18us +/- 2.930ms
^+ 192.168.1.2 2 6 017 1 -9us +/- 3.123ms
So it is really selecting the higher stratum, even if i wait for a while and check again, it still not changed.
Expected Behavior
Lowest stratum selected
Steps To Reproduce
No response
Additional information
No response