virtualbox.org

Hi,

A virtual machine crashed and I tried to look into its log file VBox.log. I went to the section titled: "Guest state at power off" but I could not understand the dump.
Can you please advise on how I can understand a virtual machine dumps?

Best regards,

You can look at the source code and/or look at many VM log files and get a feel for what is normal and what isn't.

Another thing you can do is zip it and attach the zip to a message here, so that others can review it for you, after you give a better description of the problem.

And bear in mind that the log file is mostly only useful for diagnosing VirtualBox issues, not issues with the guest OS.

Thank you mpack for your reply.
I left my virtual machine running last night, but it was off this morning. I'm trying to find out what was the cause of the shutdown.
I attached the log file.

Right on the first line I see you are using VirtualBox v5.0.0, which is by definition the buggiest member of the v5 family. If I was you I would install the latest maintenance release and then we can look at this again. See the Downloads area.

Next, I see that you don't have the extension pack installed. Let's hope you aren't using any USB devices, because they'd be working at USB1 speeds.

Next, I see that you assigned 3 cores (out of 4 available) to the VM. I would have assigned no more than 2. Let's hope the host doesn't need to do anything substantial.

I also see this in the log :-

VBox.log wrote: 34:44:52.150846 AsyncCompletion: Task 0x0000000f77c1c0 completed after 14 seconds
34:44:52.679132 AsyncCompletion: Task 0x0000000f9c5dc0 completed after 14 seconds
34:45:08.003483 OHCI#0: Lagging too far behind, not trying to catch up anymore. Expect glitches with USB devices
34:45:40.933207 OHCI#0: Lagging too far behind, not trying to catch up anymore. Expect glitches with USB devices
34:58:45.029889 AsyncCompletion: Task 0x0000018f649f80 completed after 11 seconds
34:58:47.350895 AsyncCompletion: Task 0x0000018f573dc0 completed after 11 seconds
34:58:47.365881 AsyncCompletion: Task 0x0000000f9c58c0 completed after 13 seconds
34:58:47.367463 AsyncCompletion: Task 0x0000018f581e00 completed after 13 seconds

Do you have some heavy backup process that kicks in after X hours? If so then perhaps what I said about cores comes into play here.

Let's see what happens if you take care of the first three items.