When creating a new user in xwiki the following error happens
System Information
Centos 7
Tomcat
HTTP Status 500 – Internal Server Error
Type Exception Report
Message Servlet execution threw an exception
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
javax.servlet.ServletException: Servlet execution threw an exception
com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136)
Root Cause
java.lang.ExceptionInInitializerError
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
java.lang.Class.newInstance(Class.java:442)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:172)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:147)
org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:281)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:221)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136)
Root Cause
java.lang.RuntimeException: Failed to load component for type [interface org.xwiki.captcha.CaptchaVerifier] for hint [image]
com.xpn.xwiki.web.Utils.getComponent(Utils.java:755)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:716)
com.xpn.xwiki.web.RegisterAction.(RegisterAction.java:51)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
java.lang.Class.newInstance(Class.java:442)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:172)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:147)
org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:281)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:221)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136)
Root Cause
org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [org.xwiki.captcha.internal.DefaultImageCaptchaAction] identified by [role = [interface org.xwiki.captcha.CaptchaVerifier] hint = [image]]
org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:394)
org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:190)
org.xwiki.component.internal.multi.DelegateComponentManager.getInstance(DelegateComponentManager.java:83)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:753)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:716)
com.xpn.xwiki.web.RegisterAction.(RegisterAction.java:51)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
java.lang.Class.newInstance(Class.java:442)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:172)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:147)
org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:281)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:221)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136)
Root Cause
java.lang.ExceptionInInitializerError
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
java.lang.Class.newInstance(Class.java:442)
org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:304)
org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:424)
org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:392)
org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:190)
org.xwiki.component.internal.multi.DelegateComponentManager.getInstance(DelegateComponentManager.java:83)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:753)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:716)
com.xpn.xwiki.web.RegisterAction.(RegisterAction.java:51)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
java.lang.Class.newInstance(Class.java:442)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:172)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:147)
org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:281)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:221)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136)
Root Cause
java.lang.ArrayIndexOutOfBoundsException: 0
sun.font.CompositeFont.getSlotFont(CompositeFont.java:351)
sun.font.CompositeGlyphMapper.initMapper(CompositeGlyphMapper.java:81)
sun.font.CompositeGlyphMapper.(CompositeGlyphMapper.java:62)
sun.font.CompositeFont.getMapper(CompositeFont.java:409)
sun.font.CompositeFont.canDisplay(CompositeFont.java:435)
java.awt.Font.canDisplay(Font.java:1980)
com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.checkFontCanDisplayCharacters(RandomFontGenerator.java:223)
com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.cleanFontList(RandomFontGenerator.java:179)
com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.initializeFonts(RandomFontGenerator.java:94)
com.octo.captcha.component.image.fontgenerator.RandomFontGenerator.(RandomFontGenerator.java:81)
com.octo.captcha.engine.image.gimpy.GmailEngine.buildInitialFactories(GmailEngine.java:86)
com.octo.captcha.engine.image.ListImageCaptchaEngine.(ListImageCaptchaEngine.java:24)
com.octo.captcha.engine.image.gimpy.GmailEngine.(GmailEngine.java:49)
com.octo.captcha.engine.image.gimpy.DefaultGimpyEngine.(DefaultGimpyEngine.java:50)
com.octo.captcha.service.image.DefaultManageableImageCaptchaService.(DefaultManageableImageCaptchaService.java:32)
org.xwiki.captcha.internal.DefaultImageCaptchaAction.(DefaultImageCaptchaAction.java:42)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
java.lang.Class.newInstance(Class.java:442)
org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:304)
org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:424)
org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:392)
org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:190)
org.xwiki.component.internal.multi.DelegateComponentManager.getInstance(DelegateComponentManager.java:83)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:753)
com.xpn.xwiki.web.Utils.getComponent(Utils.java:716)
com.xpn.xwiki.web.RegisterAction.(RegisterAction.java:51)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
java.lang.Class.newInstance(Class.java:442)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:172)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:147)
org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:281)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:221)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136)