Automounter Fails to Mount ISO File – Error dev_ioctl_send_fail and Empty Mount Point Observed

Issue

• After configuring the automounter to mount a local ISO file using /etc/auto.master and /etc/auto.nas, the mount point /mnt/cen5 appears, but the directory remains empty. Logs from autofs service show mounting failure with dev_ioctl_send_fail and failed to mount /mnt/cen5.

Error logs:

Aug 07 15:37:06 server1 automount[999023]: lookup_mount: lookup(file): looking up /mnt/cen5
Aug 07 15:37:06 server1 automount[999023]: lookup_mount: lookup(file): /mnt/cen5 -> -fstype=iso9660,loop,ro /var/opt/data/containers/ISO/CentOS-5.11-x86_64-bin-DVD-1of2.iso
Aug 07 15:37:06 server1 automount[999023]: parse_mount: parse(sun): expanded entry: -fstype=iso9660,loop,ro /var/opt/data/containers/ISO/CentOS-5.11-x86_64-bin-DVD-1of2.iso
Aug 07 15:37:06 server1 automount[999023]: parse_mount: parse(sun): gathered options: fstype=iso9660,loop,ro
Aug 07 15:37:06 server1 automount[999023]: parse_mount: parse(sun): dequote("/var/opt/data/containers/ISO/CentOS-5.11-x86_64-bin-DVD-1of2.iso") -> /var/opt/data/containers/ISO/CentOS-5.11-x86_64-bin-DVD-1of2.iso
Aug 07 15:37:06 server1 automount[999023]: parse_mapent: parse(sun): gathered options: fstype=iso9660,loop,ro
Aug 07 15:37:06 server1 automount[999023]: parse_mapent: parse(sun): dequote("") ->
Aug 07 15:37:06 server1 automount[999023]: lookup_mount: lookup(file): looking up /mnt/cen5
Aug 07 15:37:06 server1 automount[999023]: dev_ioctl_send_fail: token = 106
Aug 07 15:37:06 server1 automount[999023]: failed to mount /mnt/cen5
Aug 07 15:37:21 server1 automount[999023]: handle_packet: type = 5
Aug 07 15:37:21 server1 automount[999023]: handle_packet_missing_direct: token 107, name /mnt/cen5, request pid 1494
Aug 07 15:37:21 server1 automount[999023]: dev_ioctl_send_fail: token = 107