DX NetOps Portal installation fails during the MySQL initialization phase.

Products

• Network Observability
• CA Performance Management

Issue/Introduction

DX NetOps Portal installation fails during the MySQL initialization phase. The installation completes with a 'Success with errors' message, but the Portal services fail to start.

- Fatal error in installation logs: `FatalInstallException: MySql DB initialization failed!`
- MySQL initialization results (`mysql_initialize_results.txt`) show: `Operating system error number 28. Check that your OS and file system support files of this size.`
- Errors in InnoDB logs: `Error number 28 means 'No space left on device'` and `Unable to create the shared innodb_temporary`.

Environment

Product:  DX NetOps Portal 24.x, 25.x
Specific Condition: `/opt` partition is at high utilization or sized below recommended minimums

Cause

The MySQL initialization process requires sufficient contiguous disk space to create temporary tables and system files (like `ibtmp1`). OS Error 28 indicates that the partition where `/opt/CA/MySql` resides has run out of space

Resolution

1.  Increase the `/opt` partition size to a minimum of  40GB to accommodate the database and installation files
2. Confirm that the partition has not exhausted its inode limit by running: `df -i /opt
3. Ensure the `umask` for the root user is set to **022**. A restrictive umask (e.g., 027) can prevent MySQL from creating necessary files
4. Remove the failed installation directory: `rm -rf /opt/CA`.
      - Restart the DX NetOps Portal installer.