1.导入graphchi-java maven项目时报错：
Plugin execution not covered by lifecycle configuration: org.scala-tools:maven-scala-plugin:2.15.2:testCompile (execution: scala-test-compile, phase: test-compile)
解决办法：Eclipse -> Help -> Install New Software... ->见下面（http://alchim31.free.fr/m2e-scala/update-site） -> restart Eclipse -> rebuild the maven project。
原文：http://www.cnblogs.com/CherishFX/p/5228848.html