tamnw process crash on N3K-C3548P-10GX

[gsd000001]

Hi Cisco Community.

I think I have encountered a bug on my Cisco N3K-C3548P-10GX. With no crash logs saved, my device just crashed unexpectedly.
Here is the error I found upon checking my show tech-support logs.

Last reset at 437426 usecs after Sat Jan 27 02:22:06 2024
Reason: Reset triggered due to HA policy of Reset
System version: 7.0(3)I7(8)
Service: tamnw hap reset

exception information --- exception instance 1 ----
Module Slot Number: 0
Device Id : 134
Device Name : System Manager
Device Errorcode : 0x00000a26
Device ID : 00 (0x00)
Device Instance : 00 (0x00)
Dev Type (HW/SW) : 10 (0x0a)
ErrNum (devInfo) : 38 (0x26)
System Errorcode : 0x401e0089 Service in VDC has had a hap-reset
Error Type : FATAL error
PhyPortLayer : 0x0
Port(s) Affected : none
Error Description : tamnw hap reset
DSAP : 0 (0x0)
UUID : 1 (0x1)
Time : Sat Jan 27 02:22:06 2024
(Ticks: 65B468CE jiffies)

%$ VDC-1 %$ %SYSMGR-2-SERVICE_CRASHED: Service "tamnw" (PID 26847) hasn't caught signal 6 (core will be saved).
%$ VDC-1 %$ %SYSMGR-2-CORE_SAVE_FAILED: zip_copy_file_to_logflash: PID 969 with message Failed to copy /var/sysmgr/tmp/0x101_tamnw_core.26847.gz to logflash. Error file error (srcerr 0x0 dsterr 0x807b0002) .

I hope somebody can help me to fix this issue or just even identify the root cause why this happen to my device.
Looking forward to your support and assistance, Cisco Fam! Thank you very much.

[anpetit]

Hello @gsd000001 ,

tamnw process is reponsible for the flash memory. 
In "show logging nvram" we could possibly observe an error with the flash memory prior to tamnw process crash. 
Also "show processes log detail" could give us some help. 
I would also check "show module internal exceptionlog" to check if there is a bootflash error, as well as "show system internal kernel messages". 
I would also monitor if there is a memory leak within this process using: show processes memory | grep tam
Now extra point, core file didn't copy in logflash, maybe this memory is full. You can check it with dir logflash:
Lastly, you might be able to check the health of hardware component with "show diagnostic result module all". 
Hope it helps.
Kind Regards,
Antoine

[anpetit]

Hello @gsd000001 

Hope you are doing well. 
Let me know if my answer replies to your need. 
Otherwise, can we proceed with the closure of this thread ?
Kind Regards,

Antoine