Guest crash - probably host related

[mksmr]

Good morning everybody,

I'm having issue with a guest crashing on my systems - the first time fore almost a year, until then everybody went well. Here's my setup:

HP DL380 G6, 24G RAM, 8 physical cores, hyperthreading enables (should be off, I know, but it's a private system)
OS: Devuan Ascii
Virtualbox 5.2.12 r122591

Guests:
1. Debian, 4 cores, , 12G RAM (the workhorse)
2. Windows 7, 4 cores, 4G RAM
3. OpenBSD, 1 core, 1G RAM
4. Devuan, 1core, 1G RAM
5. Devuan, 2 cores, 4G RAM used as DMS
6. OpenBSD, 1 core, 1G RAM, TOR exit node

The actual work is being done on no. 1 and 3 4 (not more that 4 users at a time). As far as my monitoring shows, neither the host nor one of the guest machines is under uncommon load.

When I added machine no. 6 (a TOR exit node) yesterday, no. 1 crashed during install. When I later rebooted the host, all machines came up smoothly but no. 1 apparently failed to start or crashed after it. In both cases, I could start it manually without trouble.

The logfiles are available, but to be honest I wouldn't know what to look for. I see no obvious error in the log. Could someone point me to where to begin?

TIA
Matthias

[scottgus1]

I see no obvious error in the log. Could someone point me to where to begin?

Yes, let us take a look.

Get all your guests ready to start from cold boot, none of them should have a saved-sate. Run your whole startup sequence until you see the problem happen, then shut down the guests from within the guest OS if possible. If not possible, close the Virtualbox window for the guest with the Power Off option set.

Please zip and post the one failing guest's vbox.log, using the forum's Upload Attachment tab.

Also, please explain this a little more:

The actual work is being done on no. 1 and 3 (not more that 4 users at a time)....When I added machine no. 6 (a TOR exit node) yesterday, no. 1 crashed during install.

The first sentence sounds like guest #1 exists already, but the second sentence sounds like guest #1 is being built fresh?

[fth0]

As far as my monitoring shows, neither the host nor one of the guest machines is under uncommon load.

What does your monitoring show regarding host memory usage? You assigned 23 GB RAM to your VMs in total, and VirtualBox and the host OS will also need some host memory ...

[mksmr]

Will zip and upload the logs asap.

No. 1 crashed while I was installing no. 6. So no. 1 has been there all the time.

Memory usage on the host system is high (unsurprisingly) and free RAM drops as low as 1GB, but the system never attempts to swap. I'd rather expect that it would at least attempt that.

[mksmr]

Reducing RAM on guest no. 1 from 12 to 8G now, just to make sure.

[mksmr]

gzipped logfiles below

[mksmr]

...and the fourth (could only upload 3 per post)

[scottgus1]

Run your whole startup sequence until you see the problem happen....Please zip and post the one failing guest's vbox.log, using the forum's Upload Attachment tab.

Please confirm that you ran the whole startup sequence again and that guest #1 died again while you were working on guest #6. If this is true, please identify which of the four log zips you posted is the one log of the failing guest #1.

[fth0]

The logfiles are available, but to be honest I wouldn't know what to look for.

Start with the following lines in all of your VBox.log files:

00:00:00.211168 Host RAM: 24101MB (23.5GB) total, 13140MB (12.8 GB) available
00:00:00.886535   RamSize           <integer> = 0x0000000321000000 (13 438 550 016, 12 816 MB, 12.5 GB)
00:00:00.887322   VRamSize         <integer> = 0x0000000010000000 (268 435 456, 256 MB)

[mksmr]

Back after a while... and I have another crash (this time it's a Windows 7 guest, but it shouldn't matter).

Here's my setup:

HP DL 380G6
8 cores, multithreading enabled (I know... but it's an entirely private system)
64G RAM
Host OS: Devuan Ascii 2
Virtualbox 6.1.4 r136177 (Qt5.7.1)
Virtualbox Extension Pack as above present

Running 7 virtual machines, configured with 7 cores and 18GB RAM total

The crashed machine is Windows 7 (64bit)
8GB RAM
1 CPU, VT-x/AMD-V, Nested Paging, PAE/NX, Hyper-V virtualization
This used to run for about a year on a weaker host (DL380G6, too) with Virtualbox 5.x without any trouble.

Logfile is attached.

Any help with this would be greatly appreciated.

Matthias

Edit: Probably this one applies:
https://www.virtualbox.org/manual/ch03. ... alsettings

You should not configure virtual machines to use more CPU cores than are available physically. This includes real cores, with no hyperthreads.

The machine has eight physical cores, though, and the guests are using seven altogether. Does this line mean I cannot configure more than <number of physical cores> cores altogether, or <number of physical cores> per guest?

[scottgus1]

We never resolved the original situation and forum rules are "One issue per thread". If you want to let the old issue go without resolution, please start a new topic.

[mksmr]

OK, let's drop this because the host will become obsolete soon and the problem never reappeared. The problem seems to be related, though.

[scottgus1]

That sounds fine! Thanks for the update.

[mksmr]

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