#85 Creating categories is broken with EhCache cache engine
I suspect that one of the repositories (possibly RolesRepository. which does not check whether the cache returns anything) does not allow for the fact that the cache may get cleared.
[#23] was about a similar issue with EhCache and the RankingRepository.
2018-10-01 16:23:00,150 ERROR [ExceptionWriter] - FreeMarker template error:
Java method "static net.jforum.repository.ForumRepository.getAllCategories()" threw an exception; see cause exception in the Java stack trace.
FTL stack trace ("~" means nesting-related):
Failed at: #assign categories = repository.getAl... [in template "default/admin/category_list.htm" at line 20, column 9]
Java stack trace (for programmers):
freemarker.core._TemplateModelException: [... Exception message was already printed; see it above ...]
at freemarker.ext.beans._MethodUtil.newInvocationTemplateModelException(_MethodUtil.java:289)
at freemarker.ext.beans._MethodUtil.newInvocationTemplateModelException(_MethodUtil.java:261)
at freemarker.ext.beans.OverloadedMethodsModel.exec(OverloadedMethodsModel.java:65)
at freemarker.core.MethodCall._eval(MethodCall.java:65)
at freemarker.core.Expression.eval(Expression.java:83)
at freemarker.core.Assignment.accept(Assignment.java:134)
at freemarker.core.Environment.visit(Environment.java:330)
at freemarker.core.Environment.visit(Environment.java:336)
at freemarker.core.Environment.process(Environment.java:309)
at freemarker.template.Template.process(Template.java:384)
at net.jforum.JForum.processCommand(JForum.java:279)
at net.jforum.JForum.service(JForum.java:240)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at net.jforum.csrf.CsrfFilter.doFilter(CsrfFilter.java:100)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:185)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at psiprobe.Tomcat85AgentValve.invoke(Tomcat85AgentValve.java:45)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
at com.jamonapi.http.JAMonTomcatValve.invoke(JAMonTomcatValve.java:66)
at org.apache.catalina.valves.rewrite.RewriteValve.invoke(RewriteValve.java:542)
at org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:348)
at org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:52)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at net.jforum.security.PermissionControl.canAccess(PermissionControl.java:133)
at net.jforum.repository.ForumRepository.isCategoryAccessible(ForumRepository.java:232)
at net.jforum.repository.ForumRepository.getCategory(ForumRepository.java:179)
at net.jforum.repository.ForumRepository.getAllCategories(ForumRepository.java:272)
at net.jforum.repository.ForumRepository.getAllCategories(ForumRepository.java:293)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:1505)
at freemarker.ext.beans.ReflectionCallableMemberDescriptor.invokeMethod(ReflectionCallableMemberDescriptor.java:56)
at freemarker.ext.beans.MemberAndArguments.invokeMethod(MemberAndArguments.java:51)
at freemarker.ext.beans.OverloadedMethodsModel.exec(OverloadedMethodsModel.java:61)
... 43 more
Reverting to the previously used EhCache (2.4.8), JGroups (2.13.3) and EhCache/JGroups replication (1.4) versions fixes the issue. No code change necessary.