写mapreduce的时候导出jar包出问题,第一次是The POM for org.apache.logging.log4j:log4j-core:jar:1.2.1 is missing, 找到hadoop压缩包中/soft/hadoop/share/hadoop/mapreduce
/soft/hadoop/share/hadoop/mapreduce/lib
/soft/hadoop/share/hadoop/yarn
/soft/hadoop/share/hadoop/yarn/lib
这几个目录下的jar包,导入工程。
然后是Missing artifact jdk.tools:jdk.tools:jar:1.6,找到windows-preferences-java,找到jdk安装路径,在路径下面放jdk.tools.jar