Spring Tools Suite 4 stops working autocomplete after a while

Question

When I'm using STS (Spring Tools Suite) 4, the autocomplete stops working for no apparent reason, and the only solution I find is to stop all my work, close the STS and reopen again. But this interruption is extremely annoying.

I couldn't find the cause of the problem. It happens randomly sometime after I start working. The autocomplete screen stuck like the image above showing that "1 pending" and it never finishes.

Version: 4.8.1.RELEASE
Build Id: 202010230733

question from:https://stackoverflow.com/questions/65849101/spring-tools-suite-4-stops-working-autocomplete-after-a-while

Answer 1

This sounds related to https://github.com/spring-projects/sts4/issues/579, so please follow up on the GitHub issue with more details. Especially a thread dump of the IDE process as well as the language server process would be extremely helpful in debugging the fixing the issue.

As a workaround, you could go to the Preferences -> Java -> Editor -> Content-Assist -> Advanced and disable the Language Server Proposals. That will most likely help to avoid the problem (but also disables some of the Spring Boot related additional content-assist features for the moment) until we fixed the underlying issue.