MongoDB had an unspecified uncaught exception

Question

I am attempting to run a meteor app, but I am getting a mongo error, not sure how to debug this

[~/sites/tuts]$ meteor --port 5555
[[[[[ ~/Sites/tuts ]]]]]

Unexpected mongo exit code 100. Restarting.
Unexpected mongo exit code 100. Restarting.
Unexpected mongo exit code 100. Restarting.
Can't start mongod

MongoDB had an unspecified uncaught exception.
Check to make sure that MongoDB is able to write to its database directory.

Answer 1

Mongo was killed without cleaning itself up. Try removing .meteor/local/db/mongod.lock. If that fails you can do an meteor reset, but that will wipe your database.