Unable to stop container operation timed out

The container may not stop some particular time and if you search in the logs, you may not get the exact reason for not stopping the node.

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$ vzctl stop VEID –fast
Stopping container …
Unable to stop container: operation timed out

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The following work around will fix the issue.

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+ Delete the /vz/lock/VEID.lck file (where VEID is the number of your VPS).

+ vzctl chkpnt VEID –kill

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Now, your VPS will be able to restart successfully.