Upgrade Jackson from 2.x to 3.0.0-rc8

[kurtostfeld]

Upgrade Jackson from 2.x to 3.0.0-rc5

[ppkarwasz]

Hi @kurtostfeld,

Thank you for your patience. Now that we've released version 2.25.0, I’ll have time to return to the 3.x branch and plan to review your PR soon.

Appreciate your contribution!

[kurtostfeld]

@ppkarwasz thank you! I see the windows build is failing. I only have MacBooks, but I'll try to figure out what could be causing that.

[ppkarwasz]

Hi @kurtostfeld,

No need to worry about the Windows build — we have a number of known flaky tests that tend to fail more frequently on Windows. This is largely due to how GitHub runners are provisioned: unlike Linux runners, which use containers, Windows runners are full virtual machines. They tend to be slower and more prone to timing-related issues, which makes race conditions more likely to surface.

We track these flaky tests in Develocity though we rarely find the time to fix them properly. If you're interested in digging into one of these and exploring what kind of synchronization might be missing, contributions are always welcome!

Thanks again for your work on this PR.

[kurtostfeld]

@ppkarwasz awesome. I suspected it was a flaky test. thank you. If there are issues with the Jackson 3.0 upgrade, I'd like to help investigate and resolve them. I use log4j on a lot of work projects, and we'd like to see Jackson 3.0 in the log4j 3.0 release. Thank you :)

[ppkarwasz]

Hi @kurtostfeld,

This looks great, thanks! 💯

Can you add a changelog entry to src/changelog/.3.x.x? Our custom changelog format is documented on our website, but it should be easy grasp from the entries already present.

[ppkarwasz]

Hi @kurtostfeld,

This looks good to me and since Jackson released 3.0.0 it is the best time to merge it. Thank you again for your work! 💯

[kurtostfeld]

@ppkarwasz Wow, merged! Amazing! Thank you!