Comment 4 for bug 1635954

The error occurs when the pure QEMU Hypervisor is used. Guest OS is slowed down dramatically w/o the hardware acceleration. This may cause the timeout error on any remote operation performed by Sahara.

Please use KVM Hypervisor in Fuel.

The recommendation to avoid QEMU is also present in out docs here https://docs.mirantis.com/openstack/fuel/fuel-9.0/mos-planning-guide.html#hadoop-node-reqs