Deletion of files in /usr/bin

[pankajjoshi]

I am experiencing a strange behaviour in my Linux yocto image. Suddenly and no periodicity or frequency defined, after many months of operation, on a boot, binaries from /usr/bin folder has been deleted in one of my custom board. I can think of only 2 reasons, if someone accidentally deleted it, which is not the case. Or is there any issue in the filesystem itself. I used Linux 4.14.98_2.0.0 released for i.MX. Any debugging pointers will be very helpful. This issue has been seen after months of operation in 1/15 samples. I am using i.MX.6ULL soc on my custom board.

[pankajjoshi]

out of 35 frequent power cycles, the above logs came in 2 occasions

[pankajjoshi]

This is happening on frequent power cycles. We are getting these logs of mounting which looks issuable.

May 17 10:52:13 mackinac-6ull user.info kernel: EXT4-fs (mmcblk1p1): INFO: recovery required on readonly filesystem
May 17 10:52:13 mackinac-6ull user.info kernel: EXT4-fs (mmcblk1p1): write access will be enabled during recovery
May 17 10:52:13 mackinac-6ull user.info kernel: EXT4-fs (mmcblk1p1): recovery complete
May 17 10:52:13 mackinac-6ull user.info kernel: EXT4-fs (mmcblk1p1): mounted filesystem with ordered data mode. Opts: (null)
May 17 10:52:13 mackinac-6ull user.info kernel: VFS: Mounted root (ext4 filesystem) readonly on device 179:1.