Datasource initialisation with JPA schema configured in deferred mode happens asynchronously

[wikisamuel]

When upgrading from Spring Boot 2.2.9 to 2.3.0, unit tests cannot handle large datasets anymore.

When logging with a debug level, we see extShutdownHook drops tables before the end of the insertions, hence the test fails.

Here is a minimal reproducible example : it works with 2.2.9, but when upgrading to 2.3.0 we can see 10k rows seems too much.

The problem still exist in the last version (2.3.2).

[snicoll]

Thanks for the report and the sample. Ignoring that the project does not compile because it uses JUnit4 and the vintage engine has been excluded, I can run the test and it passes when I removed the exclusion.

Given that your example works for me, you'll have to share more details about your environment (OS, JDK). Attaching the logs of the execution (either as a file or on gist.github.com) would be helpful as well.

[wikisamuel]

Thanks for the reply. Maybe your computer is just faster than mine and you should try with a larger dataset. I've uploaded a new version with 20k rows so you can test.

Here are the logs I've just had.

I'm using Windows 10 Enterprise 1909 18363.900 and JDK 11.0.7+10.

[snicoll]

That is interesting, thanks. Spring Boot 2.3 has switched the JPA bootstrap mode to deferred and it might be causing an issue for you. To confirm this and provide you a temporary workaround if it does, can you please add spring.data.jpa.repositories.bootstrap-mode=default to your configuration to see if that problem goes away?

[rohitrajt]

I have the same problem. In my case, the unit tests works fine in 2.3.0. We have been running with 2.3.0 for quite some time now without any issues. Today, when i upgrade to 2.3.2 i see the same error as mentioned in this issue. Also I tried the solution provided by @snicoll and it still has the same issue.

I also confirmed that my unit test context starts with DEFAULT bootstrap mode, [ Test worker] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.