Spring Batch 6.0: cannot run a test which chains several jobs

[wikisamuel]

Bug description
I cannot run an integration test which launches several jobs anymore. I was trying to do it without using any deprecated class and failed to find a way.

This appears to be a regression / breaking behavior introduced in Spring Batch 6.0.

Environment
Java 25. Spring Boot Starter Parent 4.0.0.

Steps to reproduce
From the minimal complete verifiable example bellow, run mvn install.

org.springframework.batch.core.launch.JobInstanceAlreadyExistsException: Cannot start a job instance that already exists with name=job1 and parameters={{run.id=1765550710102, uuid=0d95d967-a1dd-4ebf-8534-1f81e1f8141c}}

Expected behavior
The test from the minimal complete verifiable example should pass.

Minimal Complete Reproducible example
minimal complete verifiable example that reproduces the issue.

[benelog]

@wikisamuel
It is resolved by 7eaaa02 .

If you look at the issues below together, it will help you understand the cause.

• Enhance ResourcelessJobRepository implementation for testing #5139
• JobOperatorTestUtils only allows one Job per Spring context #5118