Cannot connect to MongoDB errno:61

问题:

I installed MongoDB using macports and tried running the mongo command in order to start the mongo shell. I received the following errors:

warning: Failed to connect to 127.0.0.1:27017, reason: errno:61 Connection refused  Error: couldn't connect to server 127.0.0.1:27017 (127.0.0.1), connection attempt failed  at src/mongo/shell/mongo.js:146 

I then ran mongod and received the following error:

$ [initandlisten] MongoDB starting : pid=11984 port=27017 dbpath=/data/db 64-bit host=Nikitas-MacBook-Air.local $ [initandlisten]  $ [initandlisten] ** WARNING: soft rlimits too low. Number of files is 256, should be at least 1000 $ [initandlisten] db version v2.6.0 $ [initandlisten] git version: nogitversion $ [initandlisten] build info: Darwin tennine-slave.macports.org 13.1.0 Darwin Kernel Version  13.1.0: Thu Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20~2/RELEASE_X86_64 x86_64 BOOST_LIB_VERSION=1_55 $ [initandlisten] allocator: tcmalloc $ [initandlisten] options: {} $ [initandlisten] exception in initAndListen: 10296  *********************************************************************  ERROR: dbpath (/data/db) does not exist.  Create this directory or give existing directory in --dbpath.  See http://dochub.mongodb.org/core/startingandstoppingmongo ********************************************************************* , terminating $ [initandlisten] dbexit:  $ [initandlisten] shutdown: going to close listening sockets... $ [initandlisten] shutdown: going to flush diaglog... $ [initandlisten] shutdown: going to close sockets... $ [initandlisten] shutdown: waiting for fs preallocator... $ [initandlisten] shutdown: lock for final commit... $ [initandlisten] shutdown: final commit... $ [initandlisten] shutdown: closing all files... $ [initandlisten] closeAllFiles() finished $ [initandlisten] dbexit: really exiting now 

Where do I create the /data/db directory, at root? Would the second error be the reason for the errno:61 when I run mongo?

回答1:

Yes, you would create /data/db at root. The MongoDB Documentation suggests the following command for creation on OS X mkdir -p /data/db.

Regarding your second question, also yes. Since the Mongo Daemon failed to start and isn't listening you get the connection error.

MongoDB defaults to /data/db for the data directory. You can override the default using the --dbpath option on the mongod command (also on the doc link above).

回答2:

I encountered similar problem. I have detailed the error trace and solution on this blog This is step by step process I did to solve this issue:

Step 1 - Installation ( Don't follow this step if you have already installed MongoDB ):

brew update brew install mongodb 

Step 2 - Run Mongo Daemon:

mkdir -p /data/db sudo mongod 

Step 3 - Run Mongo Shell Interface:

mongo 

In this sequence, I was able to run the mongo command without any error.

回答3:

** WARNING: soft rlimits too low. Number of files is 256, should be at least 1000 

you can add one line into your /etc/bashrc, the warning will disappear.

ulimit -S -n 1024 

use chown -R {user} /data/db to change the owner of /data/db from root to yourself. Then you can start mongo shell just by mongo, no need to use sudo mongo.

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