安装sbt时输入./sbt sbtVersion后出现如下报错怎么解决？
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256M; support was removed in 8.0
[error] [launcher] error during sbt launcher: sbt/sbt#4955!
[error] [launcher] sbt launcher is unable to detect the Scala version for org.scala-sbt:sbt;
[error] [launcher] this likely indicates an incomplete artifact resolution and/or corrupt boot cache (~/.sbt/boot/).
[error] [launcher] the following is the full classpath that was retrieved for org.scala-sbt:sbt:
[error] [launcher] * /home/hadoop/.sbt/boot/other/org.scala-sbt/sbt/1.3.8/sbt-1.3.8.jar
