FIX: Clear connections before disabling readonly mode.

lib/active_record/connection_adapters/postgresql_fallback_adapter.rb

@@ -84,9 +84,9 @@ class PostgreSQLFallbackHandler
             if is_connection_active
               logger.warn "#{log_prefix}: Master server is active. Reconnecting..."
               self.master_up(key)
+              clear_connections
               disable_readonly_mode
               Sidekiq.unpause!
-              clear_connections
             end
           rescue => e
             logger.warn "#{log_prefix}: Connection to master PostgreSQL server failed with '#{e.message}'"