LeonxLJX commented on PR #19784:
URL: https://github.com/apache/hudi/pull/19784#issuecomment-5535793945

   CI is now green on the Scala 2.12 / Java 8 build. Root cause was
   `InputStream.transferTo(OutputStream)` in the new JAR-based test:
   that overload was added in Java 9, but the Scala 2.12 toolchain
   still compiles against `-source/-target 1.8`, so the symbol was
   missing at `TestReflectionUtils.java:116`. I just pushed a
   replacement commit (`simplify-getTopLevelClasses`) that swaps the
   single transferTo call for an 8 KiB buffered copy loop with an
   inline comment explaining the JDK constraint. Behaviour is
   identical, only the JDK-version prerequisite changes.
   
   Would a maintainer mind re-running the affected module so we can
   confirm the fix end-to-end? Happy to iterate if anything else
   shows up.


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