Upgrade to 2.7.4 broke mongoDB uuid lookup with spring data

[pcornelissen]

I have noticed that after the upgrade from spring boot 2.7.3 to 2.7.4 my application stopped "working" and almost all tests were broken.

Upon investigation I noticed that the ID lookup seems to be broken and returns no result.
I have created a minimal repo that showcases the problem:

https://github.com/pcornelissen/springboot-mongo-bug

The current version is broken, when you just change the version to 2.7.3 and do a clean package run, it will succeed.

The test does just:

        MyEntity org = MyEntity.builder().id(UUID.randomUUID()).data("foo").build();
        MyEntity saved = repo.save(org);
        assertThat(org.getId()).isEqualTo(saved.getId());
        assertThat(repo.findById(org.getId()))
                .isNotEmpty();

I have noticed that the UUID format has changed as well:

{"_id":{"$binary":{"base64":"debN0/uRTmargUJaqJSJ6Q==","subType":"04"}},"version":1,"data":"foo 2022-10-15T13:45:49.082724","_class":"com.mongo.bug.broken.MyEntity"}
{"_id":{"$oid":"634a9da17e1c5c7747488592"},"version":1,"data":"foo 2022-10-15T13:46:41.718246","_class":"com.mongo.bug.broken.MyEntity"}

The first line is produced by 2.7.3, the second with 2.7.4

I am using the standard UUID representation in the config. (I just tried the java legacy setting, but the results were identical in terms of success and format to the standard setting)

[wilkinsona]

Please take a moment to search exists issues before opening a new one. Duplicates #32741, #32635, and spring-projects/spring-data-mongodb#4184.