mahout0.9 hadoop2.4.1 编译错误 math-scala wrappers

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于 2016-08-13 00:02:41 发布

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分类专栏： mahout

本文链接：https://blog.youkuaiyun.com/lixgjob/article/details/52196515

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本文介绍了一个使用Scala 2.9.3在JDK8环境下编译mahout-distribution-0.9数学模块时遇到的问题。由于Java类文件损坏导致编译失败，并给出了解决方案：将Scala版本升级到2.10.3或更高。

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mvn clean install -Dhadoop2 -Dhadoop2.version=2.4.1 -DskipTests

[JDK8] errors when compile the module math-scala with JDK8 and maven dependency org.scala-lang:scala

[INFO] Compiling 12 source files to /root/bigtop/dl/mahout-distribution-0.9/math-scala/target/classes at 1425956054808
[ERROR] error: error while loading ConcurrentMap, class file '/usr/java/jdk1.8.0_40/jre/lib/rt.jar(java/util/concurrent/ConcurrentMap.class)' is broken
[INFO] (bad constant pool tag 15 at byte 2448)
[ERROR] error: error while loading CharSequence, class file '/usr/java/jdk1.8.0_40/jre/lib/rt.jar(java/lang/CharSequence.class)' is broken
[INFO] (bad constant pool tag 15 at byte 1501)
[ERROR] error: error while loading Comparator, class file '/usr/java/jdk1.8.0_40/jre/lib/rt.jar(java/util/Comparator.class)' is broken
[INFO] (bad constant pool tag 15 at byte 5003)
[ERROR] three errors found

The default version of org.scala-lang:scala-library in module math-scala is 2.9.3, and in order to compile with JDK8, it needs to upgrade the scala version to 2.10.3+