What is the reason for level 42 in Docker?

Question

In different places, I found information that the docker image can consist of only 42 layers. This is apparently a limitation of the AUFS file system used.

Can someone tell me why this limit exists or does anyone have documentation explaining this?

Answer 1

This seems to be mainly related to AUFS ( sfjro/aufs4-linux).
See PR 50 "Prohibit more than 42 layers in the core"

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PR 66

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Answer 2

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