Connect Timeout expired. All pooled connections are in use

[eduschell]

I’m using hangfire with mysql and I get the following error message.
Connect Timeout expired. All pooled connections are in use.

[ArclightDBIT]

We've seen the same happen with the latest version of Hangfire (v1.7.27)

[caveofjulian]

Also happening for me, software is in production. Went well for about a month, and suddenly getting these issues. I have to restart the API every hour or so. Did not update any package, version is 2.0.3.

[caveofjulian]

Update: closing code seems to be a clusterfuck in this library.

E.g. no using statements are being used and the following code could most definitely result in errors (why is the reference check here?). improvement must be done to have using statements
internal void ReleaseConnection(IDbConnection connection) { if (connection != null && !ReferenceEquals(connection, _existingConnection)) { connection.Dispose(); } }