Guice + Tomcat potential memory leak

Question

I have just started using Google Guice with my Tomcat webapp, and have noticed the following in the catalina.out file whenever the WAR file is undeployed:

May

Answer 1

This helped me to get rid of "SEVERE" log entry for com.google.inject.internal.InjectorImpl:

injector = null;
System.gc(); 

Where injector was the result of Guice.createInjector(...modules...)

I admit, it looks like I didn't read about bad habit of calling System.gc(), but it totally makes sense, since Guice uses weak references internally.

P.S. Tomcat 8, Java 8, Guice 3.0