Issue
I Use STS 4.3.1 RELEASE in Window 10 Home.
When I use auto-complication in java or jsp file, it suddenly work slowly. ( My STS Min/Max memory 3000M)
In progress tab, "Send Classpath Notifications" process has stated and soon be increased a lot.
Then STS soon be conspicuously slow performance, and then has "no response" (with white state)
In fact, In 4.2 or lower than other version of STS, I didn't meet this issue.
Solution
Send ClassPath Notification
can be reolved with any of the following modifications based on the problem.
Better approach is to try doing each step and check whether your issue is still persisting.
Fix:1
In most of the cases, quick restart of the STS or Eclipse will resolve the issue of continues Send ClassPath Notification
Fix:2
Updating the Version 4.2.2 to 4.2.1
Fix:3
Navigate to Windows => Preferences => Language Servers -> Spring Language Servers
and try disabling them
Reference : https://github.com/spring-projects/sts4/issues/218
Answered By - Srikanth Avadhanula