[IDEA single point debugging error]: Connected to the target VM

main environment: IDEA 2017.3.4 jdk8

use the main frame: Spring Boot

problem: Connected to the target VM, address: "127.0.0.1 transport:" socket"

pops up after a single point of operation.

phenomenon: the program can be run alone, but it cannot be debugged by debug. debugging reports an error

Mar.31,2021
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