Has the Linux Virtual Machine since come back up or are you unable to connect to it even now, one hour later? What state is listed next to the Virtual Machine in the portal?
Based upon the symptoms you are calling out, it is possible the hardware hosting the VM went bad, indicating the lower I/O and swapping numbers. Then, we may have detected it and migrated your virtual machine to new hardware. However, I would expect it to
be back up by now...
The VM got back online after a reboot, although the issues are still here.
This Linux VM is very unstable. Tens of times a day the machine is inaccessible for 5 to 20 minutes and comes back again. This behavior has been repeating during the last couple of days.
Sometimes the machine seem to have rebooted (looking at the uptime), but not every time.
I'll drop you an email with the information required for further investigation.
After investigation by Azure operations, the issues are reported to be caused by faulty memory modules in the host server. They took the host out of the production pool, causing this VM to be transfered to another host.
This solved all the issues.
For future reference: if you experience the same issue, you may delete the VM and redeploy the same VHDs again. Most probably this solves the issue since there is only a slight change the new VM instance would land on the same host server.
Marked As Answer byDjon KleineSaturday, July 21, 2012 11:04 AM