Hi!
Today I have the same problem, but there are another interfaces on another switch in syslog messages:
Jan 16 07:54:38 Rack05-PoeSw3 %%10MSTP/5/MSTP_BPDU_RECEIVE_EXPIRY(l): Instance 0's port GigabitEthernet1/0/25
received no BPDU within the rcvdInfoWhile interval. Information of the port aged out.
Jan 16 07:54:39 Rack05-PoeSw3 %%10MSTP/5/MSTP_BPDU_RECEIVE_EXPIRY(l): Instance 0's port GigabitEthernet1/0/26
received no BPDU within the rcvdInfoWhile interval. Information of the port aged out.
[Rack05-PoeSw3]dis stp hist
--------------- STP slot 1 history trace ---------------
------------------- Instance 0 ---------------------
Port GigabitEthernet1/0/26
Role change : Desi->Root
Time : 2017/01/16 07:55:30
Port priority : 0.7848-596b-92e6 3001 32768.d894-0346-5aaa 0
32768.d894-0346-5c12 128.25
Port GigabitEthernet1/0/25
Role change : Root->Alte
Time : 2017/01/16 07:55:30
Port priority : 0.7848-596b-92e6 4000 32768.d894-0346-5aaa 0
32768.d894-0346-5ac8 128.26
Port GigabitEthernet1/0/25
Role change : Desi->Root
Time : 2017/01/16 07:55:30
Port priority : 0.7848-596b-92e6 4000 32768.d894-0346-5aaa 0
32768.d894-0346-5ac8 128.26
Port GigabitEthernet1/0/26
Role change : Root->Desi (Aged)
Time : 2017/01/16 07:54:39
Port priority : 0.7848-596b-92e6 3001 32768.d894-0346-5aaa 0
32768.d894-0346-5c12 128.25
Port GigabitEthernet1/0/25
Role change : Alte->Desi (Aged)
Time : 2017/01/16 07:54:38
Port priority : 0.7848-596b-92e6 4000 32768.d894-0346-5aaa 0
32768.d894-0346-5ac8 128.26
Because of this, I think, the cause of problem is not in a bad link (cable) or bad SFP transceiver.
Interestingly, the problem occurs usually at night or on weekends, when network traffic is minimal.
As I know, maximum STP disameter = 7 is only recomendation for default STP timers.
I have RSTP configured on all switches with similar STP timers etc.
Some days ago I have changed hello interval (2 sec -> 1 sec) to increase STP stability on network with big diameter.
[Rack05-PoeSw5]dis stp
-------[CIST Global Info][Mode RSTP]-------
CIST Bridge :32768.d894-0346-5762
Bridge Times :Hello 1s MaxAge 20s FwDly 15s MaxHop 20
CIST Root/ERPC :0.7848-596b-92e6 / 2001
CIST RegRoot/IRPC :32768.d894-0346-5762 / 0
CIST RootPortId :128.26
BPDU-Protection :enabled
Bridge Config-
Digest-Snooping :disabled
TC or TCN received :195
Time since last TC :0 days 3h:39m:46s
Is it right: I need to enable "stp root-protection" "stp loop-protection" on all root and alternate ports to prevent loops and increase MaxAge and ForwardDelay timers?
As I know, I don't need to enable vlan1 for RSTP on Comware.
Thanks!