org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getHTMLDiff' in class com.xpn.xwiki.plugin.watchlist.WatchListEvent threw exception java.lang.NullPointerException at xwiki:XWiki.WatchListMessage[line 148, column 33]
at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:243)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
at org.apache.velocity.context.ProxyVMContext.get(ProxyVMContext.java:219)
at org.apache.velocity.runtime.parser.node.ASTReference.getVariableValue(ASTReference.java:991)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:240)
at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:420)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228)
at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:184)
at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:117)
at com.xpn.xwiki.plugin.mailsender.MailSenderPlugin.sendMailFromTemplate(MailSenderPlugin.java:813)
at com.xpn.xwiki.plugin.watchlist.WatchListNotifier.sendEmailNotification(WatchListNotifier.java:133)
at com.xpn.xwiki.plugin.watchlist.WatchListJob.executeJob(WatchListJob.java:270)
at com.xpn.xwiki.plugin.scheduler.AbstractJob.execute(AbstractJob.java:71)
at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
Caused by: java.lang.NullPointerException
at com.xpn.xwiki.objects.BaseProperty.equals(BaseProperty.java:108)
at com.xpn.xwiki.objects.NumberProperty.equals(NumberProperty.java:57)
at com.xpn.xwiki.objects.BaseCollection.equals(BaseCollection.java:624)
at com.xpn.xwiki.objects.classes.BaseClass.getDiff(BaseClass.java:1211)
at com.xpn.xwiki.doc.XWikiDocument.getClassDiff(XWikiDocument.java:5600)
at com.xpn.xwiki.plugin.watchlist.WatchListEvent.getHTMLDiff(WatchListEvent.java:534)
at sun.reflect.GeneratedMethodAccessor706.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
... 27 more
Bug
Major