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Azure VM restarts randomly and crashes

Hello, I noticed random restarts of my bigger azure VMs (4 and 8 cores) on Windows Server 2016. It wasn't happening before. VM is created from image, software is installed (always the same) and after a few days, one or two weeks VM restarts. It has running status after manual starting it from the portal but properties like computer name or host are unavailable. RDP stopped working.
From the logs I can only see messages from Health Event Updated:
"channels": "Admin, Operation",
"properties": {
"title": "Unknown",
"details": "Unknown",
"currentHealthStatus": "Unavailable",
"previousHealthStatus": "Available",
"type": "Downtime",
"cause": "Unknown"
},

and

"properties": {
"title": "Reboot initiated from inside the machine",
"details": "A reboot was triggered from inside the virtual machine. This could be due to a virtual machine operating system failure or as requested by an authorized user or process. The virtual machine will be back online after the reboot completes.",
"currentHealthStatus": "Unavailable",
"previousHealthStatus": "Unavailable",
"type": "Downtime",
"cause": "UserInitiated"
},

Since then VM is not working. The same VMs created a few months ago do work fine actually.

How these kind of issues could happen?
I don't know how to fix that. Removing VM with its disk from the portal and creating again results in the same issue after some time. This is really frustrating.

Thanks!

azure-virtual-machines
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@mike23onazure-4678

Firstly, apologies for the inconvenience this issue may have caused. I do understand your frustration seeing a repeated VM deployments resulting into same error state.

Based on the issue details you shared, issue might be because of something struck at backend ARM level. This can be better handled via a support case.

I would recommend you to contact azure support. If you have a support plan, requesting you to file a support ticket, else please do let us know, we will try and help you get a one-time free technical support.


In this case, could you send an email to AzCommunity[at]Microsoft[dot]com referencing this thread as well as your subscription ID. Please mention "ATTN: Vikas" in the subject line. Thank you for your cooperation on this matter and look forward to your reply.


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Hello @vipullag-MSFT,

Thank you for your answer. I already contacted azure support, but unfortunately it takes a lot of time to diagnose it. I wish I could share some more details, but I am not allowed to.
Basically I asked that question to find out some more checks / reasons why that issue occurred. Maybe there's a similar temporary problem already known to the community or anyone met that too.

0 Votes 0 ·

@mike23onazure-4678

Thanks for opening the support case.

I checked internally on this and there is no outage or know issue at this point.
So, support have to troubleshoot the issue and share the findings on the case.

Also, once the issue is resolved do add the information for the benefit of the community.

However, please share the Support case number via the email in my previous response so that we will track internally.

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1 Answer

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mike23onazure-4678 answered

Hi there,

I am sorry for not being active lately...

It turned out that the problem was with one cumulative update. An update caused that VM was not able to boot up.
I reproduced that issue on the new VM with image from the marketplace in October. One month later VM was not able to boot up after installing November cumulative update. It happened on an E series VM with intel CPUs. Others series seem to be fine for me.

Cheers

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