KVM virtual machine fail to start with error "Cannot allocate memory"

Solution Verified - Updated -

Issue

We have developed scripts to deploy the virtual machine settings, but on a server we are having a problem never seen before. A VM already created successfully in the past can not be started. When tying to start the virtual machine using virsh the following message is shown:

virsh # start RHEL6.3
error: Failed to start domain RHEL6.3
error: Unable to read from monitor: Connection reset by peer

Environment

  • Red Hat Enterprise Linux 6
  • KVM

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