Erlang code path prefers older versions of CouchDB
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Key: COUCHDB-505
URL: https://issues.apache.org/jira/browse/COUCHDB-505
Project: CouchDB
Issue Type: Bug
Affects Versions: 0.11
Environment: any system where different minor versions of CouchDB have
been installed to the same --prefix
Reporter: Adam Kocoloski
Priority: Blocker
Fix For: 0.11
We're using ERL_LIBS to add PREFIX/lib/couchdb/erlang/lib to the code path on
CouchDB startup. If multiple versions of CouchDB have been installed, that
directory might look something like
mochiweb-r97
ibrowse-1.5.2
couch-0.9.0
couch-0.10.0a
...
In this case, we want the system to use beams from couch-0.10.0a, but
apparently Erlang's code loader sorts couch-0.9.0 higher.
One solution would be to fall back to explicitly adding specific app
directories to the code path using -pa.
An elegant solution would be to make sure that our app directories are named in
such a way that they automatically sort correctly in the code loader. I'm not
sure this is really possible, though, particularly when a user is installing
development versions built from source next to released versions.
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