Hi Chris, Thanks for the reply. Let me try this out. But do you think its a bug in Tomcat ? Because as an application developer I should be able to invoke arbitrary application logic during the ServletFilter::destroy(...) method without bothering about the class loading related issues (Note that the jar files for these classes are available inside WEB-INF/lib directory and the shutdown process completes successfully most of the times without raising NoClassDefFoundErrors).
Please let me know. Regards Hrishikesh On Fri, Feb 5, 2016 at 8:12 PM, Christopher Schultz < ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hrishikesh, > > On 2/5/16 6:57 PM, Hrishikesh Gadre wrote: > > We are getting NoClassDefFoundErrors during Tomcat graceful > > shutdown process (i.e. using "catalina.sh stop" command). We are > > using Tomcat with version 6.0.44. Note that this error can not be > > reproduced consistently. I found following article on the > > stackoverflow.com which suggests class loader related problems > > during execution of JVM shutdown hook. But in this case, the error > > is raised during the execution of ServletFilter::destroy(...) > > method. So I am not sure if article is relevant. > > This kind of thing usually happens because Tomcat marks the > WebappClassLoader as "shutting down" and it won't load any new > classes. So, if your shutdown code ends up requiring new classes, it > could fail. > > Is this reproducible? If possible, can you write a > ServletContextListener that will simply load the class in question > (com.google.common.cache.RemovalCause) and do nothing else? > > If that solves the problem, then the root issue is what I described > above (and may be replaced by a series of other classes for the same > reason; just load them all as a test to see if this is what's happening. > ) > > It's not a great solution, but it might fix the problem and allow your > application to shutdown (actually) gracefully. > > - -chris > -----BEGIN PGP SIGNATURE----- > Comment: GPGTools - http://gpgtools.org > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iEYEARECAAYFAla1cp4ACgkQ9CaO5/Lv0PB7EACfQvNwIHoHT89yeSKgP4+Fff4n > gYUAoLLgQkISwi0zueBXPT2cBXenYBRt > =yGJb > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
