#Openstack + NetApp NFS disconnects

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waxen sierra
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We have NFS disconnects with the error message kernel: NFS: nfs4_reclaim_open_state: Lock reclaim failed! VM goes into hung state and the only way to recover is reset the VM or detach and attach the volume again.
Openstack Versions:
Cinder: 12.0.10-11
Nova: 17.0.13-7
Qemu: 2.12.0-44
Libvirt: 4.5.0-36
Ontap Version: 9.10.1P12