Hi,

I have just installed xwiki 9.3 and I am having problems with the
notification settings. I've used tomcat9, mysql14 on centos 6.9.

On the user profile, Notifications Preferences option I cant change the
notification settings. Every time i toggle the option I get an error:
"Failed to save your settings"

and get this error on the server:
mai 09, 2017 11:19:02 AM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.IllegalStateException: The Web form cannot be parsed as no fresh
content is available. If this entity has been already read once, caching of
the entity is required
        at org.restlet.engine.util.FormUtils.parse(FormUtils.java:272)
        at org.restlet.data.Form.<init>(Form.java:88)
        at
org.xwiki.rest.internal.representations.objects.FormUrlEncodedObjectReader.readFrom(FormUrlEncodedObjectReader.java:82)
        at
org.xwiki.rest.internal.representations.objects.FormUrlEncodedObjectReader.readFrom(FormUrlEncodedObjectReader.java:52)
        at
org.restlet.ext.jaxrs.internal.wrappers.provider.SingletonProvider.readFrom(SingletonProvider.java:304)
        at
org.restlet.ext.jaxrs.internal.wrappers.params.EntityGetter.getValue(EntityGetter.java:109)
        at
org.restlet.ext.jaxrs.internal.wrappers.params.ParameterList.get(ParameterList.java:1090)
        at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:169)
        at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
        at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
        at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.routing.Router.doHandle(Router.java:500)
        at org.restlet.routing.Router.handle(Router.java:740)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at
org.restlet.engine.application.StatusFilter.doHandle(StatusFilter.java:154)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.engine.ChainHelper.handle(ChainHelper.java:114)
        at
org.restlet.engine.application.ApplicationHelper.handle(ApplicationHelper.java:75)
        at org.restlet.Application.handle(Application.java:391)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.routing.Router.doHandle(Router.java:500)
        at org.restlet.routing.Router.handle(Router.java:740)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.routing.Router.doHandle(Router.java:500)
        at org.restlet.routing.Router.handle(Router.java:740)
        at org.restlet.routing.Filter.doHandle(Filter.java:159)
        at org.restlet.routing.Filter.handle(Filter.java:206)
        at org.restlet.engine.ChainHelper.handle(ChainHelper.java:114)
        at org.restlet.Component.handle(Component.java:391)
        at org.restlet.Server.handle(Server.java:491)
        at org.restlet.engine.ServerHelper.handle(ServerHelper.java:74)
        at
org.restlet.engine.http.HttpServerHelper.handle(HttpServerHelper.java:153)
        at
org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1031)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at
org.xwiki.wysiwyg.server.filter.XWikiContextInitializationFilter.doFilter(XWikiContextInitializationFilter.java:85)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at
org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at
org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:134)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
        at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
        at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:495)
        at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:767)
        at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1354)
        at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)


Already searched everywhere for this error on notifications with no success.
Can anyone kindly point me to some direction, already reinstalled twice with
same result.

best regards



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