[BUG] mount pod umounts itself at the very beginning

[timfeirg]

mount pod seems to umount its own mount point, causing app pod to lost connection

2024/04/25 03:38:48.316696 juicefs[64] <INFO>: mountpoint /jfs/juicefs-pv-utpxzh is broken: stat /jfs/juicefs-pv-utpxzh: transport endpoint is not connected, umount it [mount.go:140]
2024/04/25 03:38:48.690241 juicefs[157] <INFO>: JuiceFS version 5.0.10 (2024-01-31 10fbc97) [mount.go:632]
2024/04/25 03:38:48.697953 juicefs[157] <INFO>: Cache: /juicefs/cache/xx capacity: 1636000 MB [disk_cache.go:1074]
2024/04/25 03:38:48.698587 juicefs[157] <INFO>: Peer listen at 172.31.0.96:36639 [peer.go:1011]
2024/04/25 03:38:48.699661 juicefs[157] <INFO>: Mounting volume xx at /jfs/juicefs-pv-utpxzh ... [mount_unix.go:640]
OK, liblib is ready at /jfs/juicefs-pv-utpxzh.
2024/04/25 03:38:53.422126 juicefs[64] <INFO>: watching /jfs/juicefs-pv-utpxzh, pid 157 [mount_unix.go:112]