java.lang.ClassNotFoundException is raised when referring to the flyway.callbacks property #2829

mahaker · 2020-05-24T12:35:47Z

Which version and edition of Flyway are you using?

6.4.2 CE

Which client are you using? (Command-line, Java API, Maven plugin, Gradle plugin)

Gradle plugin

Which database are you using (type & version)?

Postgres 12

Which operating system are you using?

mac OS Catalina 10.15.2

What did you do?

(Please include the content causing the issue, any relevant configuration settings, the SQL statement that failed (if relevant) and the command you ran.)

clone repository
run docker-compose up -d
run ./gradlew flywayMigrate

I'm using Intellij IDEA 2019.3.3 for development.
I wanted to create tables in SQL and populate them with test data in Java.
This is because we wanted to change the test data by environment variables.

What did you expect to see?

The ability to perform Java callbacks and submit test data.

What did you see instead?

It's a stacktrace(./gradlew flywayMigrate --stacktrace).

[mahaker@mahaker-mbp] flyway-callback-java[master]$: ./gradlew flywayMigrate --stacktrace
> Task :flywayMigrate FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':flywayMigrate'.
> Error occurred while executing flywayMigrate
  Unable to instantiate class db.migration.FillTestData : db.migration.FillTestData
  db.migration.FillTestData

* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':flywayMigrate'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.accept(ExecuteActionsTaskExecuter.java:121)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.accept(ExecuteActionsTaskExecuter.java:117)
        at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:184)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:110)
        at org.gradle.api.internal.tasks.execution.ResolveIncrementalChangesTaskExecuter.execute(ResolveIncrementalChangesTaskExecuter.java:84)
        at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:91)
        at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionStateTaskExecuter.execute(ResolveBeforeExecutionStateTaskExecuter.java:74)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:109)
        at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute(ResolveBeforeExecutionOutputsTaskExecuter.java:67)
        at org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute(ResolveAfterPreviousExecutionStateTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:93)
        at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:45)
        at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:94)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:63)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:46)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
        at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:46)
        at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: org.flywaydb.core.api.FlywayException: Error occurred while executing flywayMigrate
Unable to instantiate class db.migration.FillTestData : db.migration.FillTestData
db.migration.FillTestData
        at org.flywaydb.gradle.task.AbstractFlywayTask.runTask(AbstractFlywayTask.java:550)
        at jdk.internal.reflect.GeneratedMethodAccessor373.invoke(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:103)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.doExecute(StandardTaskAction.java:48)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:41)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:28)
        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:705)
        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:672)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$4.run(ExecuteActionsTaskExecuter.java:338)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:402)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:394)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:92)
        at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:327)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:312)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$200(ExecuteActionsTaskExecuter.java:75)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:158)
        at org.gradle.internal.execution.impl.steps.ExecuteStep.execute(ExecuteStep.java:46)
        at org.gradle.internal.execution.impl.steps.CancelExecutionStep.execute(CancelExecutionStep.java:34)
        at org.gradle.internal.execution.impl.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:69)
        at org.gradle.internal.execution.impl.steps.TimeoutStep.execute(TimeoutStep.java:49)
        at org.gradle.internal.execution.impl.steps.CatchExceptionStep.execute(CatchExceptionStep.java:34)
        at org.gradle.internal.execution.impl.steps.CreateOutputsStep.execute(CreateOutputsStep.java:49)
        at org.gradle.internal.execution.impl.steps.SnapshotOutputStep.execute(SnapshotOutputStep.java:42)
        at org.gradle.internal.execution.impl.steps.SnapshotOutputStep.execute(SnapshotOutputStep.java:28)
        at org.gradle.internal.execution.impl.steps.CacheStep.executeWithoutCache(CacheStep.java:133)
        at org.gradle.internal.execution.impl.steps.CacheStep.lambda$execute$5(CacheStep.java:83)
        at org.gradle.internal.execution.impl.steps.CacheStep.execute(CacheStep.java:82)
        at org.gradle.internal.execution.impl.steps.CacheStep.execute(CacheStep.java:37)
        at org.gradle.internal.execution.impl.steps.PrepareCachingStep.execute(PrepareCachingStep.java:33)
        at org.gradle.internal.execution.impl.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:38)
        at org.gradle.internal.execution.impl.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:23)
        at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:95)
        at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:88)
        at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:52)
        at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:36)
        at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:34)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:109)
        ... 37 more
Caused by: org.flywaydb.core.api.FlywayException: Unable to instantiate class db.migration.FillTestData : db.migration.FillTestData
        at org.flywaydb.core.internal.util.ClassUtils.instantiate(ClassUtils.java:59)
        at org.flywaydb.core.api.configuration.ClassicConfiguration.setCallbacksAsClassNames(ClassicConfiguration.java:1457)
        at org.flywaydb.core.api.configuration.ClassicConfiguration.configure(ClassicConfiguration.java:1842)
        at org.flywaydb.core.api.configuration.FluentConfiguration.configuration(FluentConfiguration.java:1054)
        at org.flywaydb.gradle.task.AbstractFlywayTask.runTask(AbstractFlywayTask.java:545)
        ... 78 more
Caused by: java.lang.ClassNotFoundException: db.migration.FillTestData
        at org.flywaydb.core.internal.util.ClassUtils.instantiate(ClassUtils.java:57)
        ... 82 more


* Get more help at https://help.gradle.org

BUILD FAILED in 0s
1 actionable task: 1 executed

The text was updated successfully, but these errors were encountered:

mahaker · 2020-05-24T12:38:36Z

Could it be a setup error on my part?
I would like to learn more about it.

juliahayward · 2020-05-26T08:51:26Z

So Gradle knows there is a Java migration called db.migration.FillTestData (so it's unlikely to be a configuration issue), but is unable to actually create the migration object. Does the class have a public zero-argument constructor - even an implicit one? Are you able to share the source code for the migration? If you would rather not post publically then you can email support@flywaydb.org and mention issue #2829.

mahaker · 2020-05-26T11:27:51Z

@juliahayward
Thanks for the reply!

I created a constructor, and the result was the same.
Here's migrations.
https://github.com/mahaker/flyway-callback-java/tree/master/src/main/resources/db/migration

Lyeeedar · 2020-06-03T09:02:16Z

We've managed to reproduce the issue, and are looking at developing a fix. Hopefully for the next patch.

Lyeeedar · 2020-06-03T13:13:45Z

Okay so on further investigation, this is actually simpler than we thought. The issue is occurring because the callback class has not yet been built. You can fix this in one of 2 ways.

Solution 1: Make the migrate task depend on the classes task. You can do this by adding flywayMigrate.dependsOn classes to the end of the build.gradle file. Note: If you do this, and you want to run clean or repair or any of the other tasks, you need to add flyway{TaskName}.dependsOn classes for each task.

Solution 2: Call gradle like so: ./gradlew classes flywayMigrate

mahaker · 2020-06-03T13:58:22Z

@Lyeeedar
Thank you for very good solutions!
I've confirmed that it works as expected, for each solutions.

ref flyway/flyway#2829

mahaker changed the title ~~ClassNotFoundExeception is raised when referring to the flyway.callbacks property~~ java.lang.ClassNotFoundExeception is raised when referring to the flyway.callbacks property May 24, 2020

mahaker changed the title ~~java.lang.ClassNotFoundExeception is raised when referring to the flyway.callbacks property~~ java.lang.ClassNotFoundException is raised when referring to the flyway.callbacks property May 24, 2020

juliahayward added the s: waiting for feedback label May 26, 2020

Lyeeedar self-assigned this Jun 2, 2020

Lyeeedar added t: bug and removed s: waiting for feedback labels Jun 2, 2020

Lyeeedar added s: waiting for feedback r: will document and removed t: bug r: will document labels Jun 3, 2020

Lyeeedar closed this as completed Jun 3, 2020

mahaker pushed a commit to mahaker/flyway-callback-java that referenced this issue Jun 3, 2020

javaでflywayのコールバックが動くようにした。

12589ce

ref flyway/flyway#2829

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java.lang.ClassNotFoundException is raised when referring to the flyway.callbacks property #2829

java.lang.ClassNotFoundException is raised when referring to the flyway.callbacks property #2829

mahaker commented May 24, 2020

mahaker commented May 24, 2020

juliahayward commented May 26, 2020

mahaker commented May 26, 2020

Lyeeedar commented Jun 3, 2020

Lyeeedar commented Jun 3, 2020

mahaker commented Jun 3, 2020

java.lang.ClassNotFoundException is raised when referring to the flyway.callbacks property #2829

java.lang.ClassNotFoundException is raised when referring to the flyway.callbacks property #2829

Comments

mahaker commented May 24, 2020

Which version and edition of Flyway are you using?

Which client are you using? (Command-line, Java API, Maven plugin, Gradle plugin)

Which database are you using (type & version)?

Which operating system are you using?

What did you do?

What did you expect to see?

What did you see instead?

mahaker commented May 24, 2020

juliahayward commented May 26, 2020

mahaker commented May 26, 2020

Lyeeedar commented Jun 3, 2020

Lyeeedar commented Jun 3, 2020

mahaker commented Jun 3, 2020