I posted this a week ago, and I solved this issue - I just had to add a
`Class.forName("com.mysql.cj.jdbc.Driver")` call, which was not needed in
App Engine 8 with Java 8 when running in the cloud, but apparently it is
now required. Without this, the database connection pool just
cannot initialize, and all you get is a stack trace which ultimately ends
with "No suitable driver".
Thanks,
Tom Harris
On Mon, Oct 11, 2021 at 6:45 AM Tom Harris <t...@terratrue.com> wrote:
> Hi all, running into a very thorny issue that I have spent considerable
> time on now, without a working solution.
>
> We have a set of Java 8 AppEngine-based microservices that I am upgrading
> to Java 11 and Spring Boot. The services are using MySQL via Cloud SQL with
> Google's socket factory. Locally, we use the MySQL driver directly and the
> services run as expected.
>
> However when I try to deploy out to a cloud environment, when the code
> tries to instantiate the Hikari connection pool using Cloud SQL, I receive
> the dreaded "No suitable driver" error from the JDBC DriverManager.
>
> Our project includes these two dependencies:
> <dependency>
> <groupId>com.google.cloud.sql</groupId>
> <artifactId>mysql-socket-factory-connector-j-8</artifactId>
> <version>1.3.3</version>
> </dependency>
> <dependency>
> <groupId>mysql</groupId>
> <artifactId>mysql-connector-java</artifactId>
> <version>8.0.26</version>
> </dependency>
>
> Here is the code that is failing:
> HikariConfig config = new HikariConfig();
> config.addDataSourceProperty("useSSL", "false");
> config.addDataSourceProperty("useUnicode", "true");
> config.addDataSourceProperty("characterEncoding", "UTF-8");
> config.setRegisterMbeans(true);
>
> config.setJdbcUrl("jdbc:mysql:///dbname");
> config.setUsername(dbUser);
> config.setPassword(dbPassword);
> config.addDataSourceProperty("socketFactory",
> "com.google.cloud.sql.mysql.SocketFactory");
> config.addDataSourceProperty("cloudSqlInstance", instanceConnectionName);
>
> return new HikariDataSource(config);
>
> And every time I try to fire up the service after deploying it to the
> cloud, I am seeing the error:
>
> Caused by: java.lang.RuntimeException: Failed to get driver instance for
> jdbcUrl=jdbc:mysql:///dbname at
> com.zaxxer.hikari.util.DriverDataSource.<init>(DriverDataSource.java:114)
> at com.zaxxer.hikari.pool.PoolBase.initializeDataSource(PoolBase.java:331)
> at com.zaxxer.hikari.pool.PoolBase.<init>(PoolBase.java:114) at
> com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:108) at
> com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:81) at
> com.terratrue.db.DataSources.initDataSourceForCloudEnvironmentForUser(DataSources.java:276)
> Caused by: java.sql.SQLException: No suitable driver at
> java.sql/java.sql.DriverManager.getDriver(DriverManager.java:298) at
> com.zaxxer.hikari.util.DriverDataSource.<init>(DriverDataSource.java:106)
> ... 53 common frames omitted"
>
> I have searched the internet for anything that would help resolve this
> issue, but I can't seem to find a relevant solution. The jar files for both
> libs are found in the app-staging folder, so I know they are getting
> deployed with the service.
>
> Does anyone have suggestions as to what to do next?
>
> Thanks,
> Tom Harris
>
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