madrob commented on issue #1390: LUCENE-9266 remove gradle wrapper jar from source URL: https://github.com/apache/lucene-solr/pull/1390#issuecomment-607435284 From @gerlowskija on Slack: >Initially it failed for me with: `./gradlew --info tasks Error: Could not find or load main class buildSrc.src.main.java.org.apache.lucene.gradle.WrapperDownloader.java` But that turned out to be because I was using Java8. Might be worth doing some sort of java -version check somewhere, but maybe not worth the trouble. >Sure. But while people are developing on a mix of master/8x, there’s gonna be Java version mixups pretty frequently, so people are gonna start seeing that opaque error message unless we give them a better one. A better error message would be nice here, but I also don't want to figure out how to parse the output. Maybe the easiest solution is to add another class with an empty main method and if that fails we assume the java launcher is too old?
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