mikemccand opened a new issue, #13695:
URL: https://github.com/apache/lucene/issues/13695
### Description
On `main` today, with Java 21 on a recent Arch Linux, if I run `./gradlew
clean` then `./gradlew check`, all is good. It passes.
But if I run `./gradlew check` again, I sometimes (not always -- might take
another `./gradlew check`) get these false warnings about unreferenced license
files:
```
WARNING: there were unreferenced files under license folder:
- /s1/l/9x/lucene/licenses/antlr4-runtime-LICENSE-BSD.txt
- /s1/l/9x/lucene/licenses/antlr4-runtime-NOTICE.txt
- /s1/l/9x/lucene/licenses/asm-LICENSE-BSD_LIKE.txt
- /s1/l/9x/lucene/licenses/asm-NOTICE.txt
- /s1/l/9x/lucene/licenses/asm-commons-LICENSE-BSD_LIKE.txt
- /s1/l/9x/lucene/licenses/asm-commons-NOTICE.txt
- /s1/l/9x/lucene/licenses/assertj-core-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/assertj-core-NOTICE.txt
- /s1/l/9x/lucene/licenses/commons-codec-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/commons-codec-NOTICE.txt
- /s1/l/9x/lucene/licenses/commons-compress-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/commons-compress-NOTICE.txt
- /s1/l/9x/lucene/licenses/commons-logging-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/commons-logging-NOTICE.txt
- /s1/l/9x/lucene/licenses/hamcrest-LICENSE-BSD.txt
- /s1/l/9x/lucene/licenses/hamcrest-NOTICE.txt
- /s1/l/9x/lucene/licenses/httpclient-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/httpclient-NOTICE.txt
- /s1/l/9x/lucene/licenses/httpcore-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/httpcore-NOTICE.txt
- /s1/l/9x/lucene/licenses/icu4j-LICENSE-BSD_LIKE.txt
- /s1/l/9x/lucene/licenses/icu4j-NOTICE.txt
- /s1/l/9x/lucene/licenses/javax.servlet-LICENSE-CDDL.txt
- /s1/l/9x/lucene/licenses/javax.servlet-NOTICE.txt
- /s1/l/9x/lucene/licenses/jetty-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/jetty-NOTICE.txt
- /s1/l/9x/lucene/licenses/jts-core-LICENSE-BSD_LIKE.txt
- /s1/l/9x/lucene/licenses/jts-core-NOTICE.txt
- /s1/l/9x/lucene/licenses/junit-LICENSE-CPL.txt
- /s1/l/9x/lucene/licenses/junit-NOTICE.txt
- /s1/l/9x/lucene/licenses/morfologik-fsa-LICENSE-BSD.txt
- /s1/l/9x/lucene/licenses/morfologik-fsa-NOTICE.txt
- /s1/l/9x/lucene/licenses/morfologik-polish-LICENSE-BSD.txt
- /s1/l/9x/lucene/licenses/morfologik-polish-NOTICE.txt
- /s1/l/9x/lucene/licenses/morfologik-stemming-LICENSE-BSD.txt
- /s1/l/9x/lucene/licenses/morfologik-stemming-NOTICE.txt
- /s1/l/9x/lucene/licenses/morfologik-ukrainian-search-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/morfologik-ukrainian-search-NOTICE.txt
- /s1/l/9x/lucene/licenses/nekohtml-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/nekohtml-NOTICE.txt
- /s1/l/9x/lucene/licenses/opennlp-tools-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/opennlp-tools-NOTICE.txt
- /s1/l/9x/lucene/licenses/procfork-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/procfork-NOTICE.txt
- /s1/l/9x/lucene/licenses/randomizedtesting-runner-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/randomizedtesting-runner-NOTICE.txt
- /s1/l/9x/lucene/licenses/s2-geometry-library-java-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/s2-geometry-library-java-NOTICE.txt
- /s1/l/9x/lucene/licenses/spatial4j-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/spatial4j-NOTICE.txt
- /s1/l/9x/lucene/licenses/xercesImpl-LICENSE-ASL.txt
- /s1/l/9x/lucene/licenses/xercesImpl-NOTICE.txt
```
It's sometimes a smaller set of (still false positive) warnings, which is
also odd.
For the longest time I've been assuming I'm doing something wrong :) But
then I noticed @msokolov also sees this sometimes, so it's not just me. Does
anyone else see these?
[I also raised [this dev list
discussion](https://lists.apache.org/thread/xgqb00w597z087fsf9sj2s7jq27y2llc)
about it].
### Version and environment details
_No response_
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