Hi
I have regular Spring Boot java app that connects to mysql
Cloud Run has min instances set to 0 and 10 as max
Periodically I get massive number of errors that occurs during especially during weekends
Maybe it is correlated to my maintenance / backup windows - but it this state it is not acceptable 
Redeploying the cloud run solves the problem
Iām connecting to DB using private ip, using serverless vpc - maybe that is the issue ?
Are you deploying the Cloud Run service using the spring-cloud-gcp package? This thread in Stackoverflow reports similar behavior (with the same error message you included). The Cloud Run service also seems to stop showing the errors for a while after a re-deploy.
This thread has been answered, and a solution is to verify that your application.properties file is set up correctly (a sample working snippet is included). Have you tried that solution and still receive the same issue?
Otherwise, can you provide your application.properties file?
Hi
I have in person posted https://stackoverflow.com/questions/72354448/cloud-run-cloud-sql-mysql
question
The fix was to upade the mysql-socket-factory from 1.3.0 into 1.5.0
The problem is solved (for now) by updating mysql-socket-factory from 1.3.0 into 1.5.0
