qemu processes are hung in D state after to underlying storage problem

Solution Verified - Updated -

Issue

  • qemu processes are hung in D state after to underlying storage problem
  • It is impossible to restart the libvirt vm from Openstack or virsh.

Environment

  • Red Hat OpenStack Platform
  • instance using cinder block storage from FC/iSCSI
  • All path of a LUN failed belonging to the instance

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