参考: Fedora 21 mostly working but NullPointerException at Karaf shell 在使用ODL的时候,安装功能组件时出现: Error executing command: java.lang.NullPointerException 查看本机java配置,是1.8.0版本的: java version "1.8.0_72" Java(TM) SE Runtime Environment (build 1.8.0_72-b15)…
今天打开eclipse出现了这个问题:下面是老外给出的办法,粘给大家: Instead of deleting the whole .metadata folder, just delete the file .metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi" You need to make sure to quit eclipse first, then remove this file and start eclipse a…