Eclipse alt+/Smart Tip error Issue

Environment

Operating system: WIN10
Eclipse:neon 4.6.1, 4.6.3

Error message

The approximate meaning is:

problems durin content assistorg.eclipse.recommenders.completion.rcp.javaCompletionProposalComputer.intelligentproposal computer from the org.eclipse.recommenders.completion.rcp plug-in did not complete normallythe extension took too long to return from the computeCompletionProposals() operation

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Look at the picture:

Comments in the solution:

1、点击报错的那个连接`（Window -> preferences -> java -> Editor -> Content Assist -> Advanced）`。2、再打开的配置了面将`Default Proposal Kinds`栏中`Java Proposals (Code Recommenders)`前面的对勾去掉就可以了。3、生效后，我的就没有提示，然后又将剩余的两个`Java Proposals`、`Java Proposals（Task-Focused）`打上对勾才正常。

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Eclipse alt+/Smart Tip error Issue