Is My Server Restarting/Going To Sleep/Saving/Hibernating/Something Else???

[Fazza]

Our Network/Server monitoring system has reported that last week (Tuesday-Friday) that it lost contact (PING) with one of our servers at approx 19:42 each evening. This did not happen over the weekend however.

 

The server is a Virtual Server running on Hyper-V.

 

If I log on to the Server itself it has an uptime of 23 days and there are no entries in the Event Viewer to indicate that a restart or shutdown has occurred. If I log on to the Hyper-V Host Server and look in Hyper-V Manager it says it has an uptime of just 2 days - i.e. it was last turned on, on Friday at around 19:46!

 

I cant see anything untoward in the Event Viewer - certainly no reboots/restarts/shutdowns.

 

So which is right 23 days or 2 days, why the discrepancy and why is this happening?!

[Sagima]

If it was more than the one server I'd suspect the hyper-v host was rebooting and saving the state of the machine so it looks like it has stayed on for x days while the host has rebooted.

 

As to why, being it is at the same time each evening I'd look to a scheduled task like the backup process.

[strawberry]

Backup maybe?

[Fazza]

There are 5 VM's on the Hyper-V host and there is only one that this is happening to. We use SCDPM2012R2 for our backups and have been backing them all up fine - it's only last week that this issue has occurred.

 

The Express Full Backup starts at 19:30 on the Hyper-V host so it could be related to backups, just not sure why it is only happening to one server as they are all backed up the same way??

[Sagima]

My first though is that the virtual server has a snapshot/checkpoint stored somewhere and dpm is having to save the vm state to back it up

 

You could reschedule the backup on that one server to see if the error moves with it. Look at a windows update or some other piece of software that was installed on that server or the host or, less likely, the dpm server in the last week. It is probably worth checking you have the latest cumulative update/hotfix for dpm though.

[Fazza]

Oddly enough it didnt do it last night - I shall wait and see what happens tonight as last week it did it every night from Tuesday-Friday.