Github user revans2 commented on the issue:
https://github.com/apache/bookkeeper/pull/110
@eolivelli I am OK with having MD5 in there, but it is horribly insecure
and should not be used in production. If we do put it in we should deprecate
it very quickly afterwards and ask people to move to kerberos.
https://en.wikipedia.org/wiki/MD5
The fact that ZK still uses it is on my TODO list as it should be replaced
with something better.
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