> From: Christopher Schultz [mailto:ch...@christopherschultz.net] > Subject: Re: Follow-up: Possible false-postive with > JreMemoryLeakPreventionListener > and Tomcat's JDBC Pool and OracleTimeoutPollingThread
> Thanks for the pedantry: I was in fact ignoring the difference between > the system and boot ClassLoaders. However, the primordial ClassLoader > does in fact exist, and does in fact load classes, and is not called > the "boot" ClassLoader. What you're calling the primordial class loader _is_ the boot class loader, identified by a null reference. (The use of "primordial" in the page you referred to is unusual; it's known as the boot or bootstrap class loader in almost all other documentation.) It's responsible for more than just the java.* packages, since it also loads all the com.sun.*, sun.*, and other JVM-vendor supplied classes. I ignored the extensions class loader, since it's rarely used and was not pertinent to the topic. > the system class loader is represented by an "ExtClassLoader". On top > of that is an AppClassLoader. What you're looking at is JVM-internal classes (hence the $ in the names), that just happen to be the ones chosen in current versions of the JVM. The name is an implementation detail; the internal class mechanism is used to handle privilege issues. The internal names should not be construed as descriptive of the class loader hierarchy. > On top of that is an AppClassLoader. Only for programs that supply their own, such as Tomcat. My comments concerned the JVM itself, not Tomcat. > DriverManager's ClassLoader is in fact null, the primordial class loader. Unless one configures a replacement DriverManager (I think there's a system property for that, but I'm not sure). - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
