Mongorestore don't know what to do with file "db/collection.bson", skipping

mongodb

I want to migrate my mongodb from 2.0 to 3.0. So I followed the official doc to use mongodump to backup my dbs and use mongorestore to restore the dbs to mongodb 3.0.

But when I use mongorestore, it tells me "don't know what to do with file "db/collection.bson", skipping...".

Nothing to do. How could I migrate my dbs?

Thanks.

EDIT: Here is my steps.

Use mongodump in mongodb 2.0

mongodump
tree dump
    db
    ├── collection-1.bson
    ├── collection-2.bson
    ├── collection-3.bson
    ├── ...

Copy db directory to mongodb 3.0 server.

On the mongodb 3.0 server calls mongorestore db

But I get this error:

mongorestore db
2015-03-10T09:36:26.237+0800    building a list of dbs and collections   to restore from db dir
2015-03-10T09:36:26.237+0800    don't know what to do with file "db/collection-1.bson", skipping...
2015-03-10T09:36:26.237+0800    don't know what to do with file "db/collection-2.bson", skipping...
2015-03-10T09:36:26.237+0800    don't know what to do with file "db/collection-3.bson", skipping...
...
2015-03-10T09:36:26.237+0800    done

Solution 1:

It seems one must also specify -d in 3.0 like this:

mongorestore -d db db

Solution 2:

This answer isn't directly related to your issue case, but the same error output you will receive trying to restore mongo data, dumped with --archive option, available since MongoDB 3.2 version. To resolve this you need to specify --gzip parameter in your mongorestore command. Example:

mongorestore -d destination_db --gzip /path/to/source/db

Solution 3:

If you have lost your mongoDb just try running this command:

mongorestore -d destination-db --gzip source-db

Where:

destination-db is the name of the destination database
source-db is the name of the source database.

Solution 4:

Try this one.

mongorestore -db dataBaseName dataBasePath

Solution 5:

In order to import data to your mongodb ,You need to specify --db configuration in mongorestore function with name and path, this works for me for bson and json files as well:

mongorestore --db <dbName> <dbPath>

check the data was imported properly using mongo cli

mongo
show databases
use <dbName>
show collections