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Description

Error 94, 'Not Yet Initialized', indicates that a MongoDB instance or a replica set member is not fully ready to process requests. This commonly occurs when a `mongod` process has started but has not completed its initialization sequence, or if a new replica set member is still synchronizing or awaiting configuration.

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Error Message

Not Yet Initialized

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Known Causes

3 known causes

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Incomplete Instance Startup

The `mongod` process has started but has not finished its internal initialization routines, such as data file loading or initial replica set setup.

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Replica Set Member Pending

A new or existing replica set member is in the process of joining the set, synchronizing data, or awaiting initial configuration from the primary.

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Data Directory Problems

Issues with the data directory, such as corruption, incorrect permissions, or insufficient disk space, can prevent the instance from fully initializing.

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Solutions

4 solutions available

1. Ensure mongod is Running and Accessible easy

Verify the MongoDB server process is active and listening on the correct port.

1

Check the status of the MongoDB service.

sudo systemctl status mongod

2

If the service is not running, start it.

sudo systemctl start mongod

3

If the service is already running, try restarting it to refresh its state.

sudo systemctl restart mongod

4

Verify that mongod is listening on the expected network interface and port (default is 27017). You can use netstat or ss for this.

sudo netstat -tulnp | grep mongod

5

If you are connecting from a different machine, ensure that your firewall rules allow access to the MongoDB port.

sudo ufw allow 27017/tcp

2. Check MongoDB Data Directory Permissions medium

Ensure the MongoDB user has read/write access to its data directory.

1

Identify the data directory for your MongoDB installation. This is typically specified in your `mongod.conf` file (e.g., `/var/lib/mongodb`).

grep dbpath /etc/mongod.conf

2

Check the ownership and permissions of the data directory.

ls -ld /var/lib/mongodb

3

Ensure the directory is owned by the MongoDB user (usually `mongodb`). If not, change the ownership.

sudo chown -R mongodb:mongodb /var/lib/mongodb

4

Ensure the directory has appropriate read, write, and execute permissions for the owner.

sudo chmod -R u+rwx /var/lib/mongodb

5

After correcting permissions, restart the MongoDB service.

sudo systemctl restart mongod

3. Verify mongod Configuration File medium

Inspect the MongoDB configuration file for any syntax errors or incorrect settings.

1

Locate your `mongod.conf` file. Common locations are `/etc/mongod.conf` or `/usr/local/etc/mongod.conf`.

ls /etc/mongod.conf

2

Open the configuration file for editing.

sudo nano /etc/mongod.conf

3

Carefully review the `storage` section, particularly the `dbPath` and `journal` settings. Ensure `dbPath` points to a valid and accessible directory.

storage:
  dbPath: /var/lib/mongodb
  journal:
    enabled: true

4

Check for any typos or syntax errors in the configuration file. YAML is sensitive to indentation.

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5

If you made changes, save the file and restart the MongoDB service.

sudo systemctl restart mongod

4. Check for Disk Space Issues easy

Ensure the disk where MongoDB data is stored has sufficient free space.

1

Determine the partition where your MongoDB data directory resides. You can use `df -h` and look for the `dbPath` identified in Solution 2.

df -h

2

Check the 'Avail' column for the relevant partition. If it's very low or zero, you need to free up disk space.

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3

If disk space is low, consider deleting unnecessary files, archiving old data, or expanding your storage.

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4

After freeing up space, restart MongoDB.

sudo systemctl restart mongod

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Related Errors

5 related errors

MongoDB Error 94: Database Not Initialized