I have a REST webservice written in Java that runs on the Glassfish server, but I started having problems with the JDBC pooling system. It kept crashing, saying that it was unable to allocate any more connection objects. This made no sense to me, as I had set the maximum pool size to 1000, and I surely was not getting that many simultaneous connections. Also, I consulted with some Glassfish experts at a company called OmniFish, and this didn't help.
So I decided to shift to Tomcat, which doesn't require connection pooling. I have implemented my system in both IntelliJ IDEA and VSCode, with suitable changes to make a direct connection to MySQL. Both of these produce a file called HolidaysRESTJSON-1.0-SNAPSHOT.war. This deploys in Tomcat (I'm using tomcat-9.0.107), but when I try to access it with my test URL, http://localhost:8080/HolidaysRESTJSON-1.0-SNAPSHOT/webresources/holidaysandevents/countries I get a 404 error. It is supposed to return a list of countries. This did work with my Glassfish version, however. So it should work with Tomcat. The question is: Why not? Is there something wrong with my URL? How would I know? P.S.: I also tried this with TomEE, with the same results.
