I can see errors like this in runtime (Jetty only, not reproducible with Tomcat) I'm using Java8
Steps are: 1) mvn jetty:run-exploded 2) wait long enough These errors seems to affect nothing, so I thought it is some jetty problem On Thu, 29 Nov 2018 at 15:36, Martin Grigorov <[email protected]> wrote: > Hi, > > Those classes are in wicket jars but if they were not loaded by the > WebappClassLoader before the call to javax.servlet.Filter#destroy() then > the web container won't be able to load them inside #destroy(). > It is some kind of security protection done by the web container to not > load any new classes once destroy is initiated. > > The usual solution is to pre-load (at Application#init()) all classes which > might be needed in Application#destroy() but this might break at any time > when some new code is added to #destroy(), even in the application code - > Application#onDestroy(). > > > On Thu, Nov 29, 2018 at 10:15 AM Rob Audenaerde <[email protected]> > wrote: > > > Hi all, > > > > The problem where WicketApplication.destroy() hangs in 8.1.0 seems to be > > fixed with WICKET-6603, however, I noted a new problem (less impacting > for > > me at least). > > > > When quickly firing up embedded jetty, then opening a page and shutting > > jetty down, I get exceptions in the page serializer. Note that this has > > nothing to do with the WicketTester, as I use a pre-compiled > > application.war in a standalone embedded Jetty. > > > > (Jetty version: 9.4.11.v20180605, Java version: build > > 10.0.2+13-Ubuntu-1ubuntu0.18.04.4, wicket version 8.2.0) > > > > I got at least these two on different occasions: > > > > Exception in thread "Wicket-AsyncPageStore-PageSavingThread" > > java.lang.NoClassDefFoundError: > > org/danekja/java/util/function/serializable/SerializableBiConsumer > > at java.base/java.lang.Class.getDeclaredMethods0(Native Method) > > at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3119) > > ... > > > > and > > > > Exception in thread "Wicket-AsyncPageStore-PageSavingThread" > > java.lang.NoClassDefFoundError: > > org/apache/wicket/request/mapper/parameter/INamedParameters$Type > > at java.base/java.lang.Class.getDeclaredMethods0(Native Method > > ... > > > > There classes are present in the wicket jars, so I'm a bit at loss as to > > what causes this. I can simple wrap the `destoy()` of my application in a > > try-catch and ignore the exceptions; however; it seems something is > still a > > bit wrong. > > > > It seems these classes are unloaded somehow? Maybe any of you can shed > some > > light on this? > > > > -Rob > > > -- WBR Maxim aka solomax
