Heroku rake db:migrate results in Error R13 (Attach error) -> Failed to attach to process

Question

I have a rails app on heroku that i am unable to run my latest database changes with. Running heroku run rake db:migrate gives me

Running `rake db:migrate` attached to terminal... up, run.3167
!    Heroku client internal error.
!    Search for help at: https://help.heroku.com
!    Or report a bug at: https://github.com/heroku/heroku/issues/new

Error:       Operation timed out - connect(2) (Errno::ETIMEDOUT)
Backtrace:   /Users/gregg/.heroku/client/lib/heroku/client/rendezvous.rb:40:in `initialize'
             /Users/gregg/.heroku/client/lib/heroku/client/rendezvous.rb:40:in `open'
             /Users/gregg/.heroku/client/lib/heroku/client/rendezvous.rb:40:in `block in start'
             /usr/local/heroku/ruby/lib/ruby/1.9.1/timeout.rb:68:in `timeout'
             /Users/gregg/.heroku/client/lib/heroku/client/rendezvous.rb:31:in `start'
             /Users/gregg/.heroku/client/lib/heroku/command/run.rb:132:in `rendezvous_session'
             /Users/gregg/.heroku/client/lib/heroku/command/run.rb:119:in `run_attached'
             /Users/gregg/.heroku/client/lib/heroku/command/run.rb:24:in `index'
             /Users/gregg/.heroku/client/lib/heroku/command.rb:218:in `run'
             /Users/gregg/.heroku/client/lib/heroku/cli.rb:28:in `start'
             /usr/bin/heroku:24:in `<main>'

Command:     heroku run rake db:migrate
Version:     heroku-toolbelt/3.2.1 (x86_64-darwin10.8.0) ruby/1.9.3

And when i tail the logs i see the following:

2014-01-04T20:27:56.438268+00:00 heroku[run.3167]: Awaiting client
2014-01-04T20:27:56.531495+00:00 heroku[run.3167]: State changed from starting to up
2014-01-04T20:26:58.751010+00:00 heroku[router]: at=info method=GETpath=/assets/SanukWebPro-Light.woff host=stormy-savannah-1911.herokuapp.com fwd="98.210.221.215" dyno=web.1 connect=6ms service=134ms status=200 bytes=38568
2014-01-04T20:27:11.027485+00:00 heroku[router]: at=info method=GET path=/articles/new host=stormy-savannah-1911.herokuapp.com fwd="98.210.221.215" dyno=web.1 connect=3ms service=54ms status=200 bytes=7577
2014-01-04T20:28:26.446139+00:00 heroku[run.3167]: Error R13 (Attach error) -> Failed to attach to process
2014-01-04T20:28:27.994826+00:00 heroku[run.3167]: Process exited with status 128
2014-01-04T20:28:28.005837+00:00 heroku[run.3167]: State changed from up to complete

Answer 1

Try to run it in background:

heroku run:detached rake db:migrate

https://devcenter.heroku.com/articles/one-off-dynos#running-tasks-in-background

Answer 2

After running

    heroku run:detached rake db:migrate

I was able to run successfully

    heroku run rake db:migrate