[SkyWalking Java Agent] custom plugin

[ChuckChen123]

Hello, I encountered a little problem when creating a new custom plugin, can you please take a look at it.
I wrote the skywalking-plugin.def file and also implemented the instrumentation and interceptor, but the skywalking java agent did not inject code or throw errors when it was running; so I debugged in the custom plugin project and found it At this line of code it gets stuck, no error is thrown, and no execution to the next line of code:

Can you help me, I really don't have a clue, thanks！