Driver not found for mariadb database container

[CarolinaPonceRodriguez]

I'm implementing testcontainers in it's version 1.16.2 with mariadb.

This is the dependency:
<dependency>
<groupId>org.testcontainers</groupId>
<artifactId>mariadb</artifactId>
<version>1.16.2</version>
<scope>test</scope>
</dependency>

This is the portion of code:
mariaDBContainer = new MariaDBContainer<>("mariadb")
.withDatabaseName("testDatabase")
.withUsername("root")
.withPassword("");
mariaDBContainer.start();

And this is the stacktrace, it says that no driver org.mariadb.jdbc.Driver can be found. I tried with other databases, like mysql and there's no problem at all. It's convenient for me to use mariadb, is there a way to fix this?

2021-10-29 18:12:26,342 ERROR [AR3WXVN73] [---] [main] 🐳 [mariadb:latest] - Could not start container
org.testcontainers.containers.JdbcDatabaseContainer$NoDriverFoundException: Could not get Driver
	at org.testcontainers.containers.JdbcDatabaseContainer.getJdbcDriverInstance(JdbcDatabaseContainer.java:187)
	at org.testcontainers.containers.JdbcDatabaseContainer.createConnection(JdbcDatabaseContainer.java:209)
	at org.testcontainers.containers.JdbcDatabaseContainer.waitUntilContainerStarted(JdbcDatabaseContainer.java:147)
	at org.testcontainers.containers.GenericContainer.tryStart(GenericContainer.java:468)
	at org.testcontainers.containers.GenericContainer.lambda$doStart$0(GenericContainer.java:331)
	at org.rnorth.ducttape.unreliables.Unreliables.retryUntilSuccess(Unreliables.java:81)
	at org.testcontainers.containers.GenericContainer.doStart(GenericContainer.java:329)
	at org.testcontainers.containers.GenericContainer.start(GenericContainer.java:317)
	at configuration.DBTest.<clinit>(DBTest.java:45)
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:398)
	at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:467)
	at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:336)
	at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:492)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:93)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91)
	at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)
	at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116)
	at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291)
	at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:480)
	at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:337)
	at org.springframework.context.annotation.ConfigurationClassEnhancer.createClass(ConfigurationClassEnhancer.java:138)
	at org.springframework.context.annotation.ConfigurationClassEnhancer.enhance(ConfigurationClassEnhancer.java:110)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:394)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanFactory(ConfigurationClassPostProcessor.java:249)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:283)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:127)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:687)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:524)
	at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:127)
	at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:60)
	at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.delegateLoading(AbstractDelegatingSmartContextLoader.java:281)
	at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:249)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116)
	at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83)
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:117)
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83)
	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: java.lang.ClassNotFoundException: org.mariadb.jdbc.Driver
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:315)
	at org.testcontainers.containers.JdbcDatabaseContainer.getJdbcDriverInstance(JdbcDatabaseContainer.java:185)
	... 62 common frames omitted

Thanks

[kiview]

Hi @CarolinaPonceRodriguez, this looks as if you don't have the MariaDB JDBC driver on your classpath.
So you should have a dependency like this in your Maven pom.xml:

<!-- https://mvnrepository.com/artifact/org.mariadb.jdbc/mariadb-java-client -->
<dependency>
    <groupId>org.mariadb.jdbc</groupId>
    <artifactId>mariadb-java-client</artifactId>
    <version>2.7.4</version>
    <scrope>runtime</scope>
</dependency>

I also converted this into a GitHub discussion, since this is more like a question and not really an issue.

[horaoen]

I encountered a similar problem, the mysql driver could not be found, in fact I have import the mysql jdbc driver, this error occurs in the grovvy-maven-plugin, I am using it to start a mysqlcontainer instance. Later, I added the mysql driver to the grovvy dependency and the error disappeared. I don’t know if it’s the reason of the grovvy-maven-plugin or the testcontainer. The maven configuration just like this

          <plugin>
               <groupId>org.codehaus.gmaven</groupId>
               <artifactId>groovy-maven-plugin</artifactId>
               <executions>
                   <execution>
                       <id>testcontainer-start</id>
                       <phase>generate-sources</phase>
                       <goals>
                           <goal>execute</goal>
                       </goals>
                       <configuration>
                           <source>import org.testcontainers.containers.MySQLContainer

                           db = new MySQLContainer("mysql:latest")
                                   .withUsername("${db.user}")
                                   .withDatabaseName("library")
                                   .withPassword("${db.password}")
                           db.start()
                           project.properties.setProperty('db.url', db.getJdbcUrl())
                           </source>
                       </configuration>
                   </execution>
               </executions>
               <dependencies>
                   <dependency>
                       <groupId>org.testcontainers</groupId>
                       <artifactId>mysql</artifactId>
                       <version>1.18.3</version>
                   </dependency>
                   <dependency>
                       <groupId>mysql</groupId>
                       <artifactId>mysql-connector-java</artifactId>
                       <version>8.0.33</version>
                   </dependency>
               </dependencies>
           </plugin>

Although I solved this problem, I don't think it(mysql-connector-java) should be claimed here. It should be a bug. Becauses i saw that code run well without this configuration and it's using postgresql jooq-testcontainers-flyway-example