suztomo opened a new pull request #14006: URL: https://github.com/apache/beam/pull/14006
https://issues.apache.org/jira/browse/BEAM-11827 # Problem The `sdks/java/build-tools/beam-linkage-check.sh` is not working. It fails with "Failed to generate the baseline file. Check the build error above." ([full log](https://gist.github.com/suztomo/b5a33361ad83c5e5c9054b393ac496c1)). It's because `./gradlew ... -PjavaLinkageWriteBaseline=build/linkagecheck/baseline-beam-sdks-java-io-google-cloud-platform.xml :checkJavaLinkage` task does not generate a file. # Diagnosis Beam repository has migrated to the Gradle Kotlin DSL recently. The Kotlin Gradle DSL needs to add a spread operator when passing an array to "args" method. Otherwise the DSL passes a String argument from toString of the array (see the screenshot of the problem below): <img width="1311" alt="Screen Shot 2021-02-17 at 13 55 35" src="https://user-images.githubusercontent.com/28604/108257351-a83cf900-712c-11eb-806b-c3f45267808b.png";> The fix is to add a spread operator "*" when passing the array to the method. # Confirmation I confirmed the fix works: ``` suztomo@suztomo:~/beam$ mkdir build/linkagecheck suztomo@suztomo:~/beam$ ./gradlew -Ppublishing -PskipCheckerFramework -PjavaLinkageArtifactIds=beam-sdks-java-io-google-cloud-platform -PjavaLinkageWriteBaseline=build/linkagecheck/baseline-beam-sdks-java-io-google-cloud-platform.xml :checkJavaLinkage Configuration on demand is an incubating feature. > Task :checkJavaLinkage SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. Wrote the linkage errors as exclusion file: build/linkagecheck/baseline-beam-sdks-java-io-google-cloud-platform.xml NOTE: This task published artifacts into your local Maven repository. You may want to remove them manually. Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0. Use '--warning-mode all' to show the individual deprecation warnings. See https://docs.gradle.org/6.8/userguide/command_line_interface.html#sec:command_line_warnings BUILD SUCCESSFUL in 1m 49s 1121 actionable tasks: 203 executed, 918 up-to-date suztomo@suztomo:~/beam$ ls build/linkagecheck/baseline-beam-sdks-java-io-google-cloud-platform.xml build/linkagecheck/baseline-beam-sdks-java-io-google-cloud-platform.xml suztomo@suztomo:~/beam$ head build/linkagecheck/baseline-beam-sdks-java-io-google-cloud-platform.xml <?xml version="1.0" encoding="UTF-8"?> <LinkageCheckerFilter> <LinkageError> <Target> <Class name="org.tukaani.xz.LZMAOutputStream"/> </Target> <Source> <Class name="org.apache.beam.repackaged.core.org.apache.commons.compress.compressors.lzma.LZMACompressorOutputStream"/> </Source> </LinkageError> suztomo@suztomo:~/beam$ ``` ------------------------ Thank you for your contribution! 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