问题：

To avoid this message,disable the 'org.eclipse.recommenders.completion.rcp'plug-in or disable the 'Java Proposals(Code Recommenders)'category on the content assist preference page.

解决方案：

1.点击链接 content assist

2.将Default Proposal Kinds 中 项目【Java Proposals(Code Recommenders)】前的√去掉

同时将【Java Proposals】和【Java Proposals(Task-Focused)】两个项目勾选上