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https://issues.apache.org/jira/browse/IGNITE-28073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashish Mishra updated IGNITE-28073:
-----------------------------------
Summary: Examples fail with IllegalStateException when run directly -
deploymentUnitJar not built + examples not self-contained (was: Examples fail
with IllegalStateException when run directly — deploymentUnitJar not built)
> Examples fail with IllegalStateException when run directly -
> deploymentUnitJar not built + examples not self-contained
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: IGNITE-28073
> URL: https://issues.apache.org/jira/browse/IGNITE-28073
> Project: Ignite
> Issue Type: Bug
> Components: examples ai3
> Reporter: Ashish Mishra
> Assignee: Ashish Mishra
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> *Issue 1: deploymentUnitJar not wired into direct Gradle JavaExec execution*
> Running any example that requires a deployment unit directly via Gradle fails
> with:
> {color:#FF0000} *java.lang.IllegalStateException: Deployment unit JAR not
> found at:
> .../examples/java/build/libs/deploymentunit-example-1.0.0.jar*{color}
> Please build the project first: ./gradlew :ignite-examples:build
> *Affected examples :*
> - code/deployment/CodeDeploymentExample
> - compute/ComputeAsyncExample
> - compute/ComputeBroadcastExample
> - compute/ComputeCancellationExample
> - compute/ComputeColocatedExample
> - compute/ComputeExample
> - compute/ComputeJobPriorityExample
> - compute/ComputeJobStateExample
> - compute/ComputeMapReduceExample
> - compute/ComputeWithCustomResultMarshallerExample
> - compute/ComputeWithResultExample
> - serialization/SerializationExample
> - streaming/DistributedComputeWithReceiverExample
> - streaming/MultiTableDataStreamerExample
> *Root cause:* deploymentUnitJar was only wired into the build lifecycle.
> Direct class execution via Gradle uses a JavaExec task that only depends on
> classes, bypassing deploymentUnitJar.
> *Issue 2: Missing or broken setup/teardown in several examples*
> For an example to be self-contained, it must create all resources it needs
> (tables, deployment units, caches, etc.) during setup, and destroy them once
> execution completes. Several examples are not doing this — teardown is either
> missing or not executing correctly, leaving behind residual state.
> This causes:
> Failures when examples are re-run on the same cluster without a reset
> State leakage between examples when run sequentially in ai3tests
> Unreliable cyclic stability testing
> *Background / Motivation:*
> The ai3tests framework imports the ignite-examples JAR and drives each
> example class as an automated test, invoking them via a shared
> runExample(...) utility:
> java@Test
> @DisplayName("Run ComputeRustJobExample")
> public void testCompute*Example() {
> runExample(Compute*Example.class);
> }
> This pattern allows individual examples to be validated in a repeatable,
> CI-friendly way and forms the foundation for cyclic stability testing as
> well. For this to work reliably, examples must be executable directly via
> Gradle without requiring a manual build step beforehand — making this fix a
> prerequisite for stable automated test execution.
> *Steps to reproduce:*
> *1.* Clone the repo without any prior build artifacts
> *2.* Start a local 3-node Ignite cluster (just setup_cluster)
> *3.* Run any affected example directly, e.g.:
> _./gradlew :ignite-examples:ComputeJobPriorityExample.main()_
> *4.* Observe IllegalStateException: Deployment unit JAR not found
> +_Note:_+ The issue does not reproduce if ./gradlew :ignite-examples:build
> is run first, as that triggers deploymentUnitJar explicitly.
> *Fix:* Added to examples/java/build.gradle:
> tasks.withType(JavaExec).configureEach {
> dependsOn deploymentUnitJar
> }
> This ensures the deployment unit JAR is always built before any example
> class is executed via Gradle, regardless of whether build was run first.
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