Why is my MySQL Dump File Empty in a NodeJS Cron Script?

NodeJS MySQL Dump

In this discussion, a user encountered an issue while attempting to create a MySQL database dump using a cron script. Despite the script indicating successful file storage, the generated file remained empty. The root cause of this issue was identified and several suggestions were proposed to rectify the problem.

To address the empty file issue, it was noted that the provided code was failing to establish a database connection. The solution involved wrapping the code within the connection.connect() callback to ensure a successful connection before executing the SQL queries.

Additionally, it was highlighted that the save_backup() method was being called before the data was fully populated. The code was refactored to call save_backup() only after all required data was collected.

Variations of the provided code were offered, including a refactored version that employed the Q library to handle promises. This version was considered more robust and manageable.

In summary, the troubleshooting process revealed several areas of improvement:

• Ensuring a proper database connection before executing queries
• Correctly ordering code execution to ensure data availability before saving
• Exploring alternative approaches, such as using the Q library for promise handling

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