[FIXED] Servlet build failed : module has not been deployed

Issue

I am using glassfish 4.1.1 with derby database. I am using java version 15. Image to the error is shown below :the module has not been deployed. see the server log for more details

Solution

Please use Netbeans 8.2 with Java8 and Glassfish server 4.1.1 to resolve this issue. glassfish 4.1.1 is inbuilt on netbeans 8.2 and Glassfish 4.1.1 is not compatible with JDK15... I had the same error.. this worked for me..

Answered By - itsDV7