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Asked: 2026-05-27T01:10:48+00:00

I have an app setup with Rails 3.1, Mongo 1.4.0, Mongoid 2.2.4. What I

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I have an app setup with Rails 3.1, Mongo 1.4.0, Mongoid 2.2.4.

What I am experiencing is this:

Mongo::ConnectionFailure: Failed to connect to a master node at localhost:27017

I’ve had this problem before, but it went away on a computer restart… this time it does not.
I don’t understand, I didn’t do anything. I just put my computer in sleep mode, went home and woke it up, then there it was.

Here is the output of sudo mongod

Fri Nov 25 21:47:14 [initandlisten] MongoDB starting : pid=1963 port=27017          dbpath=/data/db/ 64-bit host=xxx.local
Fri Nov 25 21:47:14 [initandlisten] db version v2.0.0, pdfile version 4.5
Fri Nov 25 21:47:14 [initandlisten] git version: 695c67dff0ffc361b8568a13366f027caa406222
Fri Nov 25 21:47:14 [initandlisten] build info: Darwin erh2.10gen.cc 9.6.0 Darwin Kernel Version 9.6.0: Mon Nov 24 17:37:00 PST 2008; root:xnu-1228.9.59~1/RELEASE_I386 i386 BOOST_LIB_VERSION=1_40
Fri Nov 25 21:47:14 [initandlisten] options: {}
Fri Nov 25 21:47:14 [initandlisten] journal dir=/data/db/journal
Fri Nov 25 21:47:14 [initandlisten] recover : no journal files present, no recovery needed
Fri Nov 25 21:47:15 [websvr] admin web console waiting for connections on port 28017
Fri Nov 25 21:47:15 [initandlisten] waiting for connections on port 27017

And I am able to connect with mongoin terminal.
After 2 hours of Googling I hope the competence of SOs community are able to figure this out.
Please, if you need more information about my app-setup just ask.
Thanks!

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1 Answer

  1. Editorial Team

    What you see is that the connection times out… that happens either after a long period of inactivity, or if you put your computer to sleep.

    You can change / increase the timeout value, but this way you can’t get rid of the connection timing out eventually.

    Some MongoDB drivers allow to set :timeout => false , but Mongoid seems to still have problems with that
    (see last 3 links in the list)

    Hope this helps.

    See also:

    Mongodb server goes down, how to prevent Rails app from timing out?

    MongoDB: What is connection pooling and timeout?

    https://github.com/mongodb/mongo-ruby-driver

    How can I query mongodb using mongoid/rails without timing out?

    http://groups.google.com/group/mongoid/browse_thread/thread/b5c94e7047b42f8a

    https://github.com/mongoid/mongoid/issues/455

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