Openstack - Instance creation fails with "cannot fork child process: Resource temporarily unavailable"

Solution In Progress - Updated -

Issue

  • New instances fail to spawn. The following error is present in the nova-compute.log: "cannot fork child process: Resource temporarily unavailable"
  • This issue is likely once more than 150 VM instances are running on a single hypervisor.

Environment

  • Red Hat Openstack Platform 16

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