Database errors can badly affect any website functioning.

Thus MongoDB error 1067: The process terminated unexpectedly literally stops the website.

Usually, this error happens because of unclean shutdown or sometimes due to insufficient disk space.

At Bobcares, we get many requests to fix MongoDB errors, as a part of our Server Management Services.

Today, let’s have a look into the causes of 1067 error and see how our Support Engineers fix it.

Explaining the MongoDB error 1067

MongoDB is a cross-platform, document-oriented database. Today, let’s have a look into a MongoDB error in the Windows platform.

Recently one of our customers got a MongoDB error 1067. The typical error message appeared as,

There are a few possible reasons for this error. This can be due to an unclean shutdown or insufficient disk space.

Causes and Fixes for the 1067 error

Our Dedicated Engineers with expertise over a decade are familiar to fix MongoDB errors. Let’s see how we fix the 1067 error in MongoDB.

1. Remove the MongoDB lock file

The most common cause for the 1067 error is an unclean shutdown. The complete error message clearly indicates this.

The Mongo DB service is starting.

The Mongo DB service could not be started.

A system error has occurred.

System error 1067 has occurred.

The process terminated unexpectedly.

Usually, MongoDB creates a mongodb.lock file in the dbpath when the server starts and drops it when it’s stopped. However, an unclean shutdown doesn’t remove this file. A residual lock file means that MongoDB didn’t stop correctly.

So, when the user tries to start the mongod service again, it shows the error 1067. In such cases, our Support Team manually removes the lock file,

\data\db\mongod.lock

Later, we repair the mongodb.exe, the build-in MongoDB daemon for the Windows platform. For this, we use the command,

mongod.exe --repair

Finally, we start the mongod service using,

net start MongoDB

Overall removing the lock file together with repairing the database fixes the error.

2. Insufficient space in hard disk

Similarly, if the server hard disk doesn’t have enough space then also it is not possible to run the MongoDB process. In most cases, this results in the termination of the process. As a result, it shows up MongoDB error 1067.

Usually, MongoDB needs at least 3.5GB as storage space. So, our Support Engineers recommend removing unwanted data. This is to create free space in the system. In addition, if we can’t free up enough space, we recommend users to add more disk space. In most situations, this resolves the error.

[Still having difficulty in fixing MongoDB error? – We’ll fix it for you.]

Conclusion

In short, MongoDB error 1067 occur due to unclean shutdown which results in the formation of mongod.lock file. Likewise, this error also occurs due to insufficient disk space. Today, we saw how our Support Engineers fix it.