It was actually one of mine. I put a jar file under lib/ that I forgot had the offending class packaged into it.
On Tue, May 12, 2020 at 5:13 PM Christopher Schultz < ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Jonathan, > > On 5/8/20 15:03, Jonathan Yom-Tov wrote: > > Got it! Using http://jhades.github.io/ it was quick and easy to > > find out that the offending class was indeed loaded from two > > different jar files. After I removed one of them casting worked > > with no issues. I didn't know jar hell could result in > > ClassCastException, but you learn something new every day. > > So what were the two libraries that were conflicting? Logging > libraries should be REALLY obvious since they have a very good chance > of colliding. Did some other library "helpfully" package log4j inside > its own JAR file? > > - -chris > > > On Fri, May 8, 2020 at 9:29 PM Olaf Kock <tom...@olafkock.de> > > wrote: > > > >> > >> On 08.05.20 19:50, Christopher Schultz wrote: > >>> Olaf, > >>> > >>> On 5/8/20 13:19, Olaf Kock wrote: > >>> > >>>> You might want to hunt down duplicate classes in the JAR > >>>> files on your classpath. Worst case: unpack them all in > >>>> temporary directories and check for occurrences of the > >>>> filename. Make sure that one doesn't overwrite the other when > >>>> unzipping. > >>> > >>> Or unpack them all and let the unzipper tell you if there are > >>> any filename collisions. > >>> > >>> Someone has probably written a "classpath scanner" that will > >>> just unzip everything and look for conflicts. > >> > >> > >> I've gotten follow up questions on how to use those tools in the > >> past. Key is to identify all the jars, less the options of the > >> tool, but since then I've just reverted to mention the low-tech > >> version, and am not even ashamed ;) > >> > >> That's not to say that I don't trust Jonathan to use a classpath > >> scanner - it's just a low-tech-preference out of habit. > >> > >> Plus, due to this habit, I currently can't come up with a tool's > >> name to look for :D > >> > >> Olaf > >> > >> > >> > >> --------------------------------------------------------------------- > >> > >> > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > >> For additional commands, e-mail: users-h...@tomcat.apache.org > >> > >> > > > -----BEGIN PGP SIGNATURE----- > Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ > > iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl66rREACgkQHPApP6U8 > pFhqOBAApsaappSGDrveTxgVU4X2x0VKtZxCzMX8yZ4rSPaFvRi0rMp1bLlaV/sw > ZaRAQLZbAF5dBgahU4AqKmEkPNw2SlncuykX1JZs//lCDqzaFrJ4Dbsw4YJ7cq+3 > 3jwV6LTS7XzFXOoCHShvvbbwsK2qTWE870TQwOSN+yCN0mTbZz3ah2qnKXoLWZvn > qUOfYmtTRJTN8vBsR0BpRq2QXZ+uL565A4WLeX9j5jTWiZ5zDNsjN4h9/GHcKChM > lKIwR8VVfGI+le4JHiW9kz0gukbe/gcvFNPnf5UpvpVZf4VYOQyuTV0gNYAO1QZ8 > CoZ9qNuAjO6aE4BW6PGeFCnDZ55/i6lVe8ZM69Z6WFum8jYOCi2wbuPyUmZqzTbX > aXAe7OWHXrDgdGUIUFaOvvpMjbEbG/6TBH+VMAbLN3i4uFEQwmjP+9JFn3PSeyok > ca/5ev99ExfqEOqpQgRddxjo8TBczZdchsUazvR0pcoEWzbQUPvZKN/lRnaCTkxn > Gvx7co1mw9sGVHkYhktJNLvZE6KP48xaRZISWhCVsVX0LgpUwOyD37N1+wUYgqJT > Zao62Za5GVVZrbD6+9HYBD3WhKwJwxvxICQ42diEitSxgdvRSTbuUbrREVfkiYgu > 7OmlWx6y7aXEDgDS7DSBOiMW3/N93uGzOPL0gECQnBmKHLDKfU4= > =ANY3 > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
