[erlang-questions] Mnesia cluster across releases

Daniel Dormont dan@REDACTED
Tue Mar 18 22:38:45 CET 2014

Hi all,

Can a Mnesia cluster exist across two OTP releases, specifically R15B
and R16B? I'm testing some upgrades here and seeing this error about
two minutes after trying to join a node running R16B to an existing
cluster running R15B:

=ERROR REPORT==== 2014-03-18 17:13:29 ===
Mnesia('ejabberd@REDACTED'): ** ERROR ** (core
dumped to file:
 ** FATAL ** Schema update error {{badmatch,

[{file,"mnesia_tm.erl"},{line,1699}]}]} [{op,



... etc.

If not, are there strategies for dealing with such an upgrade? Or is
this caused by something else entirely?


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