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Alexandre Takacs
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PCPU Panic error - what are they ?

I guess will have to follow up with VMware support but we are seeing a bunch of ESX crashing with PCPU panic errors:

Panic from another CPU (cpu 14, world 2097305): ip=0x4200083936a9 randomOff=0x8000000: PCPU 8: no heartbeat (3/3 IPIs received)

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Bit of a new one to us - ESX have been rock solid if anything over the past years.

Any idea what a CPU panic is and to what king of issue it might be ?


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Alexandre Takacs

8/22/2022 - Mon
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

A Pink or Purple Screen of Death (PSOD) is similar to a BSOD in Windows.

It's a crash! This issue maybe by memory issues, e.g.a BUG in the code or memory module.

Caused usually by Hardware failure or failing, incompatible hardware server not on the HCL, or hardware component on the HCL, or BUG !

Course of Action..

1. Is it repeatable or just a one off ?
2. Update ESXi to latest build available - what build are you currently on ?
3. Server on the HCL ?
4. Server full updates with it's firmware ?
5. BAD driver ? Are you using the ESXi OEM version fotr your server.
6. Any recent changes ? to server (ESXi)

VMware Support can obtain support logs and dumps, and check what the cause is, but will probably run through the above list also.
Alexandre Takacs

Running 7.0U3 - seems to have strated with that specific release. Server is on HCL, have to double check the firmware.
Pretty random but seems to be related to the Acronis ESX backup appliance. No crash since stopping using it...
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

Maybe need to check with VMware and Acronis ref. Compatibility with 7.0U3.

If running the appliance triggers a crash and repeatedly that's the culprit.
Your help has saved me hundreds of hours of internet surfing.
Alexandre Takacs

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