Software⏱️ 3 min read📅 2026-06-15

How to Fix: MongoDB error - Failed with result 'core-dump'

MongoDB error - Failed with result core-dump. Ubuntu Server 22.04.3 LTS (Jammy) issue.

Quick Answer: Check the system logs for more information and consider increasing the stack size limit or using a different configuration file.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. ✅ Best Solutions to Fix It
  3. 🎯 Final Words

The error 'core-dump' in MongoDB indicates that the process has crashed and produced a core file, which can be difficult to debug. This issue affects users who are running MongoDB on Ubuntu Server 22.04.3 LTS (Jammy) and have installed Filecloud community edition.

This error is frustrating because it prevents the user from accessing their data and is often caused by issues with memory management or configuration problems. The goal of this troubleshooting guide is to help you identify and resolve the root cause of the issue.

⚠️ Common Causes

  • The primary reason for this error is a memory-related issue, specifically an out-of-memory condition that causes MongoDB to crash. This can be due to various factors such as insufficient RAM, high memory usage by other processes, or a misconfigured system.
  • An alternative cause could be a configuration problem with the MongoDB service itself, such as an incorrect value for the `maxMem` option in the `mongod.conf` file.

✅ Best Solutions to Fix It

Restarting the MongoDB Service

  1. Step 1: Stop the MongoDB service by running the command `sudo systemctl stop mongod`. This will ensure that any pending operations are completed and prevent further damage.
  2. Step 2: Delete the existing core dump file by running the command `rm /var/lib/mongodb/core.186542` (replace 186542 with the actual PID of the crashed process).
  3. Step 3: Restart the MongoDB service by running the command `sudo systemctl start mongod`. This will attempt to restart the service and may resolve any issues that caused the crash.

Checking and Adjusting System Resources

  1. Step 1: Check the available memory on your system by running the command `free -m`. Ensure that there is sufficient RAM (at least 4GB) to run MongoDB without issues.
  2. Step 2: Adjust the `maxMem` option in the `mongod.conf` file to a lower value if you suspect high memory usage. For example, change `maxMem: 1024MB` to `maxMem: 512MB`. Then, restart the MongoDB service.

🎯 Final Words

To resolve the 'core-dump' error in MongoDB, try restarting the service or checking and adjusting system resources. If issues persist, consider seeking further assistance from Filecloud support or a Linux expert.

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