Recurrent Input/Output error [BUG]

[ed1808]

Describe the bug

When a table is selected or a query is executed or a table is modified.

This screenshot is when you modify a table and the error:

And this one is when you execute a query:

This is happening since the last update.

Platform and Database

macOS 12.7.4, MariaDB 5.5.68

[wyhaya]

Hi @ed1808, thank you for your feedback.

This is happening since the last update.

Before this, we were using a database connection pool (establishing multiple connections at the same time), we realized it had some issues, and we modified the database driver in the recent update.

Now only one TCP connection will be established to the server, when it disconnects, you may see the error 'connection closed', but it will silently reconnect in the background.

• If the reconnection is successful, you just need to rerun the query.
• If the reconnection fails, you will see a different error message.

For security reasons, SQL will not be actively executed after the connection is successful, you must rerun it.

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This can indeed occur when the TCP connection is already closed, but I am not sure if this is a BUG, could you help me investigate?

1. Does this happen frequently? Or does it occur after being idle for a while?
   If you run SQL after leaving Dataflare idle for a while, you will get a 'connection closed'. This is the expected result.
2. Have you configured "wait_timeout", "interactive_timeout" or other settings on MariaDB that can actively disconnect?The server may have actively disconnected.