Github user karuturi commented on the issue:
https://github.com/apache/cloudstack/pull/1832
@marcaurele The thread which is running the job gets killed due to
OperationCancelledException. But, if any command is already sent and is being
executed on hypervisor, that wont be cancelled. check for the changes in
AgentAttache where this new exception is thrown.
For example, if a deployvm is cancelled and the command is already sent to
hypervisor, the vm will continue to launch on hypervisor. but, on cloudstack
side, the threads and the jobs will be cleanedup and cancelled. Eventually, vm
sync will sync the states. There can be instances when the job cancellation was
successful but, the vm is in running state after sometime.
The cancellation should be used with caution only by admin keeping in mind
that some resource cleanup on hypervisor might be required.
This will only unblock the jobs in cloudstack which are waiting for a long
time for a certain job to complete.
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