hi, for a while i started to see this error in one of our projects during incremental compilation of the tests:

2025-07-24T19:17:24.388-0700 [INFO] [org.gradle.api.internal.tasks.compile.incremental.SelectiveCompiler] Full recompilation is required because JdkClassWriter.class could not be analyzed for incremental compilation. See the debug log for more details. Analysis took 1.717 secs.

the problem is that this is our biggest project, and the full compilation can take up to more than a minute - which slows down iterating on problems A LOT. • enabling the debug log does not seem to give me any more detailed information. •

JdkClassWriter.class

is only present in dependencies that are also present in other projects that do not have this problem..

It looks like the info log should include a small reason for the analysis failure (too recent bytecode version, invalid bytecode, ...) so the message becomes actionable. I think it is worth filing an enhancement request for the log message

the problem is i am not even sure how to reproduce the issue - it only seems to be causing issues in a single build - which is unfortunately our biggest... pinning byte-buddy to

1.14.8

seems to solve the issue - but it does not feel like an ideal solution... 😕

You most probably need to update Gradle to latest version for the incremental compile to work with that newer BB version. If you look inside the JAR, you see that in 1.14.8 the maximum class file version is Java 9. In 1.17.5 you see that there are also a couple of files with class file version Java 24. Those classes are most probably which cannot be analyzed and thus full recompilation is used. As Gradle 8.14 adds support to use Java 24 to run and for toolchains, it should work with that.

ah, we are using

8.11

and we have a

java 17

toolchain. so upgrading to at least

8.14

AND using

java 24

toolchain would be required to fix the problem with the incremental compilation?

No, just upgrading Gradle should be fine

gotcha, thank you, will give it a try!