SIGTERM no reach to rbd-nbd process when csi-rbdplugin pod restart

[YiteGu]

Describe the bug

rbd-nbd process running in csi-rbdplugin pod if use rbd-nbd mounter. SIGTERM no reach to rbd-nbd process when csi-rbdplugin pod restart, this issues cause to rbd watcher no graceful release. This leads to healerStageTransaction can't no fast completed, further leads to I/O interrupt 30s.

Environment details

• Image/version of Ceph CSI driver : v3.9.0
• Helm chart version :
• Kernel version :
• Mounter used for mounting PVC (for cephFS its fuse or kernel. for rbd its
  krbd or rbd-nbd) : rbd-nbd
• Kubernetes cluster version :
• Ceph cluster version :

Steps to reproduce

Steps to reproduce the behavior:

1. create a test pod with a pvc, and SC use rbd-nbd mounter
2. use fio test filesystem of pvc mount
3. restart csi-rbdplugin pod

Actual results

Expected behavior

IO interrupt quick recovery

Logs

If the issue is in PVC creation, deletion, cloning please attach complete logs
of below containers.

• csi-provisioner and csi-rbdplugin/csi-cephfsplugin container logs from the
  provisioner pod.

If the issue is in PVC resize please attach complete logs of below containers.

• csi-resizer and csi-rbdplugin/csi-cephfsplugin container logs from the
  provisioner pod.

If the issue is in snapshot creation and deletion please attach complete logs
of below containers.

• csi-snapshotter and csi-rbdplugin/csi-cephfsplugin container logs from the
  provisioner pod.

If the issue is in PVC mounting please attach complete logs of below containers.

• csi-rbdplugin/csi-cephfsplugin and driver-registrar container logs from
  plugin pod from the node where the mount is failing.

• if required attach dmesg logs.

Note:- If its a rbd issue please provide only rbd related logs, if its a
cephFS issue please provide cephFS logs.

Additional context

Add any other context about the problem here.

For example:

Any existing bug report which describe about the similar issue/behavior