Hi Chris, Thanks for the reply. Comments inline:
On Tue, Mar 27, 2018 at 4:31 AM, Christopher Schultz < ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Behrooz, > > On 3/26/18 12:26 AM, Behrooz Nobakht wrote: > > Hi, > > > > I am migrating a code base from Tomcat 8.0.38 to 9.0.6. There are a > > few things I'd like to confirm based on observations so far and ask > > for advice: > > > > 1. Default Class Loader > > > > In 9, it seems that the default is ParallelWebAppClassLoader > > compared with WebAppClassLoader in 8.0. What behavior changes does > > the new class loader bring esp. now that it seems to use > > "concurrent" approach? > > > > One specific observation so far is that the code > > > > Thread.currentThread().getContextClassLoader() > > > > used to give out "a" class loader in 8.0 but it returns null in > > 9.0. Any advice on this? > > What code is fetching the TCCL? Something like a ServletContextListener? > This is a business object trying to resolve a resource using ClassLoader#gerResource and class loader is retrieved via above way. The call stack comes from a REST request and it's not part of container/context life cycle. > > > 2. ClassNotFoundException: > > org.apache.naming.java.javaURLContextFactory > > > > Having the code: > > > > InitialContext ic = new InitialContext() > > What data type is InitialContext in your code, here? Can you post the > complete stack trace? > InitialContext is javax.naming.InitialContext. As I traced this, by default this is enabled by Tomcat itself at Catalina.java <https://github.com/apache/tomcat/blob/trunk/java/org/apache/catalina/startup/Catalina.java#L823> . We might be having implicit class loader conflicts which I am tracing now. I event tried to install a custom Loader <http://tomcat.apache.org/tomcat-9.0-doc/config/loader.html> inside the Context with WebappClassLoader to see anything changes in comparison with ParallelWebappClassLoader. Tomcat 8 works but Tomcat 9 fails with ClassNotFoundException: javax.naming.NoInitialContextException: Cannot instantiate class: org.apache.naming.java.javaURLContextFactory [Root exception is java.lang.ClassNotFoundException: org.apache.naming.java.javaURLContextFactory] at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:674) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:313) at javax.naming.InitialContext.init(InitialContext.java:244) at javax.naming.InitialContext.<init>(InitialContext.java:192) And, we're not explicitly bundling tomcat-catalina.jar with the webapp. Thanks, Behrooz > > > used to work on Tomcat 8.0 but now yields the above exception in > > Tomcat 9. It seems that catalina.jar is not exposed by default to a > > webapp class loader. > > Nor should it. It should not have been available to applications in > Tomcat 8, either. Are you bundling catalina.jar with your application? > > - -chris > -----BEGIN PGP SIGNATURE----- > Comment: GPGTools - http://gpgtools.org > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iQJRBAEBCAA7FiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAlq5LncdHGNocmlzQGNo > cmlzdG9waGVyc2NodWx0ei5uZXQACgkQHPApP6U8pFhSiBAArOCcZ0okwbEp1ag+ > gCJw3jXcndN3JfmcEoIjNddR8/P2BvGSpZrvNX3b/hECrmlMV7hUl0SpORl7afL5 > zrP1liEdRlZ50EmpQJULG+yjktc298Ip6eXWQLa6oX9OOLbkZyknlGeI249j6syo > FXomtb6ZQ4F0WP9wC14N/keAHL2nqTOk7+1p1khfIYPVUM1MfT9EtVnW3weL9kHd > sn1FZIV3TNkOiukQm9znIeed00YlH0kaS2V9l/GNOvkhwH66xROxiJukm3dUzTQe > djsigv/mHrEWZDG9rhteJbt9RB6XMsaQogfXh8JlZsfxt2i7Yy12O2LOOHFIMaTl > 4fjKxiuQl0iOi52rfvrp+CTO/0y0TklPh3gYcNa2dpZm/UGkLrRty199Qs9+KIgy > d0L5zT9pwFusTwKt/wiVyGcm+Jg2Lq13fD8WNMmElk1h78ceVbM3NFDxZqqaSHK2 > p3S3xrMsTeFfyFI2BRdUXlV/+HGwwLYnmHWPVSEUhV448WXdOd0kehYSJGLmfXBM > UrYiZksVTYjsJc5zCADtp4xNm/At9T/Ktcfp67Rm97bR8ityQBuf9xKpJ7eo5Gzj > Ecl4kFz2W4sRxli0H5zX8lcoO7A9AAk7P0bR1ooMZ/8d6nx1WrIx19zNXz1ou8me > qI6/uYGGZX23quqgKXKP9g2basE= > =DOWh > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- -- Behrooz Nobakht
