[action] [PR:271] Improve LC reboot cause for supervisor heartbeat loss#291
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mssonicbld merged 1 commit intosonic-net:202505from Jul 16, 2025
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When the supervisor reboots ungracefully (e.g., kernel panic), LCs lose connection and are subsequently rebooted. This change adds 'heartbeat loss' as a software reboot cause for LCs. It also modifies the reboot cause logic to prioritize this software heartbeat loss cause over any hardware triggers that occur during the supervisor-initiated LC reboot. This ensures accurate reporting of the LC's reboot reason. With new changes, output is: 1. When there's a graceful restart on Supervisor ``` admin@nfc405-3:~$ show reboot-cause User issued 'Reboot from Supervisor' command [User: Supervisor, Time: Tue Jul 15 07:03:09 PM UTC 2025] admin@nfc405-3:~$ admin@nfc405-3:~$ show reboot-cause history Name Cause Time User Comment ------------------- -------------------------------------------------------------------------------------------------------- ------------------------------- ---------- ----------------------------------------------------------------------------------------------------------------------------------- 2025_07_15_19_07_16 Reboot from Supervisor Tue Jul 15 07:03:09 PM UTC 2025 Supervisor N/A ``` 2. When there's ungraceful restart on Supervisor ``` admin@nfc405-3:~$ show reboot-cause Heartbeat with the Supervisor card lost admin@nfc405-3:~$ admin@nfc405-3:~$ show reboot-cause history Name Cause Time User Comment ------------------- -------------------------------------------------------------------------------------------------------- ------------------------------- ---------- ----------------------------------------------------------------------------------------------------------------------------------- 2025_07_15_19_30_31 Heartbeat with the Supervisor card lost N/A N/A N/A ```
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Original PR: #271 |
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gpunathilell
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Sep 24, 2025
```<br>* 5f79c8f - (HEAD -> 202506, origin/202505) Improve LC reboot cause for supervisor heartbeat loss (sonic-net#291) (2025-07-16) [mssonicbld] * d86b612 - Fix ProcessStatsST column name issue and add test case to cover check (sonic-net#286) (2025-07-10) [mssonicbld]<br>```
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When the supervisor reboots ungracefully (e.g., kernel panic), LCs lose connection and are subsequently rebooted. This change adds 'heartbeat loss' as a software reboot cause for LCs.
It also modifies the reboot cause logic to prioritize this software heartbeat loss cause over any hardware triggers that occur during the supervisor-initiated LC reboot. This ensures accurate reporting of the LC's reboot reason.
With new changes, output is: