Set the connection duration when using HikariCP

Set the maximum number of seconds a connection can persist when connecting to Cloud SQL for MySQL by using the HikariCP JDBC connection pool library.

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For detailed documentation that includes this code sample, see the following:

Code sample

Java

To authenticate to Cloud SQL for MySQL, set up Application Default Credentials. For more information, see Set up authentication for a local development environment. 

// maxLifetime is the maximum possible lifetime of a connection in the pool. Connections that
// live longer than this many milliseconds will be closed and reestablished between uses. This
// value should be several minutes shorter than the database's timeout value to avoid unexpected
// terminations.
config.setMaxLifetime(1800000); // 30 minutes

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