[google-cloud-sql-discuss] "The driver has not received any packets from the server" problem

So I use keycloak(https://www.keycloak.org/) and a personal application that I developed. I have docker images of them, at some poit they were running in google cloud Kubernetes Engine, everything was fine. I had to stop them for like half of month and now I need to put them back on.

So same docker images, same SQL instance(second generation), but I allways get the error:

Caused by: org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
Caused by: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

I created again the database user, then I created again the sqlproxy service account(with role Cloud SQL Client)

I use the latest gcr.io/cloudsql-docker/gce-proxy.

I use the command:

"command": [

             "/cloud_sql_proxy",

             "--dir=/cloudsql",

             "-instances=abc:europe-west4:instName=tcp:3306",

             "-credential_file=/secrets/cloudsql/credentials.json"

           ]

Again, I did not change anything here, yet I stll get these errors, and now I am out of ideas.

Can somebody give me a hint on what I am doing wrong ?

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