How can I clear the mongoDB oplog?

Why mongodb is locked?

• Hey folks, my development pc is 32 bit. and I work with mongodb. When I run the code I wrote, sometimes I get locked in MongoDB. I deleted from the file the problem solved. /var/lib/mongodb/mongod.lock So I always have to do it? Why MongoDB crashes?

• Answer:

  If mongodb is running and improper shutodown happens, then this problem appears. You can repair it by trying one of the following commands: 1. mongod --repair 2. mongod --dbpath /data/db --repair --repairpath /data/db 3. mongod --dbpath /data/db or from console(if service is running but db is corrupted ) > db.repairDatabase();