Flink 编译的默认 Scala 版本是 2.11.x，你可以试着把 Scala 版本切换成 2.11.x 再编译一下。
Best, tison. 苟刚 <[email protected]> 于2019年8月10日周六 下午11:08写道： > > > > Hi,All: > > > 我再尝试编译flink 1.7的源码时，遇到如下错误，本人对scala不是很了解，不知道是不是版本问题引起，另外可以去掉sacla模块编译吗： > 本机scala版本：2.13.0 > JDK 版本： 1.8.0_91 > [ERROR] Failed to execute goal > org.apache.maven.plugins:maven-compiler-plugin:3.1:compile > (default-compile) on project flink-scala_2.11: Compilation failure: > Compilation failure: > [ERROR] > /Users/gang.gou/work/git/github/flink/flink-scala/src/main/java/org/apache/flink/api/scala/typeutils/ScalaEitherSerializerSnapshot.java:[67,44] > 不兼容的类型: > 无法推断org.apache.flink.api.java.typeutils.runtime.EitherSerializer<>的类型参数 > [ERROR] 原因: 不存在类型变量L,R,T,T的实例, > 以使org.apache.flink.api.java.typeutils.runtime.EitherSerializer<L,R>与org.apache.flink.api.common.typeutils.TypeSerializer<scala.util.Either<L,R>>一致 > [ERROR] > /Users/gang.gou/work/git/github/flink/flink-scala/src/main/java/org/apache/flink/api/scala/typeutils/ScalaEitherSerializerSnapshot.java:[78,86] > 不兼容的类型: > org.apache.flink.api.common.typeutils.TypeSerializer<scala.util.Either<L,R>>无法转换为org.apache.flink.api.java.typeutils.runtime.EitherSerializer<L,R> > [ERROR] -> [Help 1] > [ERROR] > [ERROR] To see the full stack trace of the errors, re-run Maven with the > -e switch. > [ERROR] Re-run Maven using the -X switch to enable full debug logging. > [ERROR] > [ERROR] For more information about the errors and possible solutions, > please read the following articles: > [ERROR] [Help 1] > http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException > [ERROR] > [ERROR] After correcting the problems, you can resume the build with the > command > [ERROR] mvn <goals> -rf :flink-scala_2.11 > > > Process finished with exit code 1 > > > > > -- > Best Wishes > Galen.K
