catalog
1、 Idea version
2、 Error information
3、 Solutions
1、 Idea version
2、 Error information
Error running ‘XXXXXX’: java.lang.NullPointerException
3、 Solutions
Modify the port number of Tomcat and restart Tomcat
I don’t know why it’s OK to change the port. Port is not occupied, online check again, no result, is worried about how to solve the time, changed the next port on the line.
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