Since I discovered the automount feature I started to add it to fstab,
as shown below, on several systems with various versions of systemd.
Most of the time it works fine. But sometimes units fail to start.
Google does not give much hints about that, nor a pointer what limits
must be raised to avoid it, nor what (low) limits could be the cause.

Current event, which triggered this message:

...
root@anonymi:~ # systemctl status LEAP42.2.mount
● LEAP42.2.mount - /LEAP42.2
   Loaded: loaded (/etc/fstab; generated; vendor preset: disabled)
   Active: inactive (dead)
    Where: /LEAP42.2
     What: /dev/disk/by-label/LEAP42.2
     Docs: man:fstab(5)
           man:systemd-fstab-generator(8)
root@anonymi:~ # systemctl status LEAP42.2.automount
● LEAP42.2.automount
   Loaded: loaded (/etc/fstab; generated; vendor preset: disabled)
   Active: failed (Result: resources)
    Where: /LEAP42.2
     Docs: man:fstab(5)
           man:systemd-fstab-generator(8)
root@anonymi:~ # lsblk -f
NAME    FSTYPE LABEL     UUID                                 MOUNTPOINT
sda
├─sda1  btrfs  BOOT      d398bdb5-1622-43e4-887c-c7584567078d /chainloader
├─sda2  swap   SWAP      815eef7d-9586-4c5a-87a1-f1f81ed6c67a [SWAP]
├─sda3
├─sda5  ext3   SLES11SP2 d393f3fc-5959-4688-af3d-3fd8d7c869b4
├─sda6  ext3   SLES11SP3 f9b6a27b-2fb3-449f-b4d8-a1a7a866da3c
├─sda7  ext3   SLES11SP4 965a3749-06db-4895-8eee-660cedeca9ab
├─sda8  ext4   SLES15SP0 4bf640b6-5d9f-4a5c-98bf-ef63b0543fab /
├─sda9  ext3   SLES12GA  11071484-04e2-46a0-b4ce-d478c702ed28
├─sda10 ext3   SLES12SP1 154174be-edf9-44cc-8bf5-a176c8e66495
├─sda11 ext3   SLES12SP2 26a65e63-bcd4-4482-9750-acd4bc092afc
├─sda12 ext3   SLES12SP3 78d6ab38-79b9-458c-97d0-3bfbbf12ff94
├─sda13 ext3   LEAP42.1  015ce2d3-21ff-4bd6-8057-81acda9515d3
├─sda14 ext3   LEAP42.2  d2530d52-04e2-4574-91ea-65e45f0d7bf0
├─sda15 ext3   LEAP42.3  d436294f-8e8e-4d28-ad2d-5891637732cb
├─sda16 ext3   TW        5062f2e1-2c31-4291-8092-07fe74295061
└─sda17 ext3   VM_IMAGES 49f90684-3df3-4157-bb38-b92e3935e1d6
root@anonymi:~ # grep LEA /etc/fstab
LABEL=LEAP42.1 /LEAP42.1 ext3 
ro,noatime,,x-systemd.automount,x-systemd.idle-timeout=11 1 2
LABEL=LEAP42.2 /LEAP42.2 ext3 
ro,noatime,,x-systemd.automount,x-systemd.idle-timeout=11 1 2
LABEL=LEAP42.3 /LEAP42.3 ext3 
ro,noatime,,x-systemd.automount,x-systemd.idle-timeout=11 1 2
...

'journalctl -b' does not indicate any related failure.

Does anyone happen to know what limits a mount point or an automount
point might have? These systems have plenty of cpus, have plenty of
memory, likely enough to handle these few fstab entries during bootup.

Is there a way to boot with debug enabled, but not spam the serial
console with lots of noise while the issue does not happen?

Olaf

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