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VMs stopping or displaying as stopped when they are not

Description

Apologies for the long winded description, but I don't know what the problem is, just some symptoms! I'm running 4 Ubuntu Server 18.4 VMs on my FreeNAS box 24x7

1CPUx1GB for OnlyOffice Document Server
1CPUx512MB for Pi-Hole
1CPUx5GB for CrashPlan (also running a light graphical desktop)
2CPUx8GB for Docker/Portainer running ~25 containers

I have a few others that I spin up from time to time just for testing things, but very infrequently and I don't think I've even tested they still work since upgrading to 11.3

This worked to a point on my old machine (X10 E3-1231v3 with 32GB) although some of the VMs were combined, but I built a new machine (X11 E3-1230v6 with 64GB) in December 2019 and created everything in it's own VM.

It was working well for a couple of months running 11.2-U7 but has been a little problematic since upgrading to 11.3-U1.

I woke this morning and the Crashplan VM was down (I have a VNC session to this open on my desktop so I notice if this is down). I went to the FreeNAS WUI to restart, but the list of VMs show them all as down. I checked Pi-hole, OnlyOffice and Portainer, and all the services are still running so the VMs must be. I tried to restart the Crashplan VM from the switch on the VM page, but got an error message. I opened the details and tried to Restart button, which worked and started the VM. So now I have all 4 running, but the WUI is only showing Crashplan running which I restarted. I've attached some screenshots to hopefully show this.

Let me know if you need anything else.

Thanks

Problem/Justification

None

Impact

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SmartDraw Connector

Katalon Manual Tests (BETA)

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Adrian Williamson
May 31, 2020 at 10:14 AM

So far, so good and I haven't had a repeat of the problem under U3.1 after updating about a week ago.  Thanks!

Waqar
April 26, 2020 at 6:06 PM

Thank you , it's the same issue. It should be fixed in U3, please let us know if that's not the case. Thanks again

Adrian Williamson
April 26, 2020 at 3:24 PM

Had to compress over 2 files as couldn't get it under 50MB.  Thanks

Waqar
April 26, 2020 at 3:03 PM

can you please share a file you must have at /var/db/system/cores/python3.7core

Adrian Williamson
April 26, 2020 at 2:50 PM

Not sure I understand the updates, but this happened again about 15-20 minutes ago so I have another debug log if thats of any use?

This is the message in the console:
Apr 26 15:32:47 freenas0 devd: notify_clients: send() failed; dropping unresponsive client
Apr 26 15:32:47 freenas0 kernel: pid 79 (python3.7), jid 0, uid 0: exited on signal 11 (core dumped)
 

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Katalon Platform

Created April 3, 2020 at 6:55 AM
Updated July 1, 2022 at 4:49 PM
Resolved April 21, 2020 at 5:15 PM