Client closed local connection about cloud-sql-proxy

[firegnome]

@charlesa101 I had the same error messages but my problem was, that I wasn't using a connection pool for my java spring application. I was using this class as data source:

https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/jdbc/datasource/DriverManagerDataSource.html

And here it says:

NOTE: This class is not an actual connection pool; it does not actually pool Connections. It just serves as simple replacement for a full-blown connection pool, implementing the same standard interface, but creating new Connections on every call.

Since i moved to Hikari (a true connection pool) i don't have these log messages anymore and the open connections remain on 10 (the default pool size):

https://brettwooldridge.github.io/HikariCP/

Btw: If you are using django you have a similar problem. Django opens by default a new database connection for every request.

Source: https://docs.djangoproject.com/en/2.1/ref/databases/

Persistent connections avoid the overhead of re-establishing a connection to the database in each request. They’re controlled by the CONN_MAX_AGE parameter which defines the maximum lifetime of a connection. It can be set independently for each database.
The default value is 0, preserving the historical behavior of closing the database connection at the end of each request. To enable persistent connections, set CONN_MAX_AGE to a positive number of seconds. For unlimited persistent connections, set it to None.

[pavel-kurnosov]

After long debugging I found that it was issue with pod on cluster, for some reason now initialization for postgresql slower then before, and k8t restarted my pod as not ready for long time. I changed time to check and all looks fine. Maybe can help someone who willl have same issues.

[Carrotman42]

That startup time for 1.07 and 1.08 is slightly longer, but I didn't expect​ it to cause a problem. Please let me know if the startup time is too long; I expect it to be at most half a second per database instance passed as flags.

[charlesa101]

Is this issue closed? having the same problem with mysql cloudsql connection?