"exec format error" appears when docker runs homemade Ubuntu1604?

problem description

made a rootfs image of Ubuntu1604, and an error occurred during docker run: standard_init_linux.go:190: exec user process caused "exec format error" have you encountered such a problem? How to solve the problem

the environmental background of the problems and what methods you have tried

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

Docker ubuntu
Apr.09,2021

there is a problem with the startup script.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e54bf5-452c4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e54bf5-452c4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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