haskell - Yesod -- devel.hs: connect: does not exist (Connection refused) -

haskell - Yesod -- devel.hs: connect: does not exist (Connection refused) -

i'm moving web app new server , upgrading project yesod 1.2 1.4. when ran yesod devel got next error:

starting development server... starting devel application devel application launched: http://localhost:3000 devel.hs: connect: not exist (connection refused) exit code: exitfailure 1

i'm not sure how debug quickly. running on ubuntu 14.04 x64. i'm able run web server on port 3000.

i tracked downwards using database.memcache.server not having memcached running. yesod upgrade wasn't related.

haskell yesod persistent haskell-warp