sidorares / sidorares/node-mysql2
Receiving "Connection lost: The server closed the connection." with createPool
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Description
When calling execute or query from a Pool returned from createPool, I'm occasionally getting the error "Connection lost: The server closed the connection.". This error looks like it is coming from a stream close event in connection.js.
My understanding is that Pool should automatically capture this condition and recreate a connection, but that does not appear to be happening (i.e. I don't understand why I would be seeing this error when using Pool.execute or Pool.query. I'm not seeing anything in Pool.getConnection/query/execute that appear to be set up to handle a closed connection. Do I need to write my own error handling around this?
As context, I'm using this from Lambda to connect to RDSProxy, so that makes it even more fun to diagnose :)
Thanks
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Research direction
Start in connection.js at the stream close event, then trace Pool.getConnection, Pool.query, and Pool.execute to see how closed connections are handled. Reproduce the failure if possible in the Lambda/RDSProxy context and define done as Pool operations recovering from a closed connection without exposing the connection-lost error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- aws, mysql, nodejs
- Domain
- database
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100