[postgis-tickets] [PostGIS] #2382: Can't upgrade postgis ERROR: attempt to redefine parameter "postgis.backend"

[PostGIS]

#2382: Can't upgrade postgis ERROR: attempt to redefine parameter
"postgis.backend"
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 Reporter:  robe                   |       Owner:  robe         
     Type:  defect                 |      Status:  new          
 Priority:  medium                 |   Milestone:  PostGIS 2.2.0
Component:  build/upgrade/install  |     Version:  trunk        
 Keywords:                         |  
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Comment(by robe):

 To test out the 2 live so/dll theory, I was able to work around the
 problem by doing

 1) shut down postgres service
 2) rename my postgis-2.1.dll to postgis-2.1.dll.old
 3) Start up postgres service
 4) run my postgis_upgrade 2.2 script on my 2.1 database (one thing I did
 notice is that when I navigate to my postgis 2.1 database before
 upgrading, I do get an error -- can't load postgis-2.1.dll (because of
 course I got rid of it) ) (which suggests maybe the guc is trying to be
 loaded on first access of the database)

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2382#comment:19>
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