I have just developed a small micronaut CLI app to explore Micronaut jdbc and sql features. Following are the dependencies,
dependencies {
annotationProcessor("info.picocli:picocli-codegen:4.2.0")
annotationProcessor("io.micronaut.data:micronaut-data-processor")
implementation("io.micronaut:micronaut-validation")
implementation("io.micronaut:micronaut-runtime")
implementation("info.picocli:picocli")
implementation("io.micronaut.picocli:micronaut-picocli")
implementation("javax.annotation:javax.annotation-api")
implementation("io.micronaut.sql:micronaut-jdbc-dbcp")
implementation("io.micronaut.data:micronaut-data-jdbc")
runtimeOnly("ch.qos.logback:logback-classic")
runtimeOnly("com.microsoft.sqlserver:mssql-jdbc")
testImplementation("io.micronaut:micronaut-http-client")
testImplementation(platform("org.testcontainers:testcontainers-bom:1.14.3"))
testRuntimeOnly("org.testcontainers:mssqlserver")
}
The app runs fine but on exiting it fails with following error,
java.lang.ClassCastException: class io.micronaut.transaction.jdbc.TransactionAwareDataSource$DataSourceProxy cannot be cast to class io.micronaut.configuration.jdbc.dbcp.DatasourceConfiguration (io.micronaut.transaction.jdbc.TransactionAwareDataSource$DataSourceProxy and io.micronaut.configuration.jdbc.dbcp.DatasourceConfiguration are in unnamed module of loader 'app')
at io.micronaut.configuration.jdbc.dbcp.$DatasourceConfigurationDefinition.dispose(Unknown Source)
at io.micronaut.context.BeanDefinitionDelegate$ProxyDisposableBeanDefinition.dispose(BeanDefinitionDelegate.java:257)
at io.micronaut.inject.DisposableBeanDefinition.dispose(DisposableBeanDefinition.java:41)
at io.micronaut.context.DefaultBeanContext.stop(DefaultBeanContext.java:290)
at io.micronaut.context.DefaultApplicationContext.stop(DefaultApplicationContext.java:171)
at io.micronaut.context.DefaultApplicationContext.stop(DefaultApplicationContext.java:49)
at io.micronaut.context.LifeCycle.close(LifeCycle.java:61)
at io.micronaut.configuration.picocli.PicocliRunner.run(PicocliRunner.java:115)
at mnsdb.MnsdbCommand.main(MnsdbCommand.java:21)
I tried to go through the annotation based generated code in $DatasourceConfigurationDefinition
and found that in dispose method there is a checkcast instruction (check line no. 1)
public java.lang.Object dispose(io.micronaut.context.BeanResolutionContext arg0, io.micronaut.context.BeanContext arg1, java.lang.Object arg2);
0 aload_3 [arg2]
1 checkcast io.micronaut.configuration.jdbc.dbcp.DatasourceConfiguration [9]
4 astore 4
6 aload_0 [this]
7 aload_1 [arg0]
8 aload_2 [arg1]
9 checkcast io.micronaut.context.DefaultBeanContext [593]
12 aload_3 [arg2]
13 invokespecial io.micronaut.context.AbstractParametrizedBeanDefinition.preDestroy(io.micronaut.context.BeanResolutionContext, io.micronaut.context.BeanContext, java.lang.Object) : java.lang.Object [612]
16 aload 4
18 invokevirtual io.micronaut.configuration.jdbc.dbcp.DatasourceConfiguration.preDestroy() : void [618]
21 aload 4
23 areturn
So apparently micronaut is replacing the instance of io.micronaut.configuration.jdbc.dbcp.DatasourceConfiguration with TransactionAwareDataSource$DataSourceProxy when the context is intialized but while disposing the beans .. it fails because proxy could not be casted the instance which it has wrapped.
This looks like a very simple error (which could have been caught by micronaut's automation test suite) so I feel it must be happening due to some misconfiguration in dependencies.
Any help is really appreciated.
