Posts tagged with 'upgrade'

Causes for 'postgis.backend' is already set

The error ‘postgis.backend’ is already set comes up every so often in PostGIS mailing list. The issue arises often during or after an upgrade. I’ll go over causes for this I am aware of and how to fix.

The question goes something like this

After upgrading to Postgis 2.3 from 2.1, my server log is filled with these messages :

“WARNING ‘postgis.backend’ is already set and cannot be changed until you reconnect”

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