The parent suggest uses the REST service which fails here
https://github.com/xwiki/xwiki-platform/blob/xwiki-platform-5.4.3/xwiki-pla…
because the passed secret is null. I can't say why it's null though.
Hope this helps,
Marius
On Fri, Apr 4, 2014 at 1:35 PM, Justin Subert
<justin.subert(a)dynamiciq.com> wrote:
  Hello all,
 I am brand new to XWiki and am just getting my feet wet, so please forgive
 my ignorance.
 I have installed XWiki Enterprise 5.4.3 on a Ubuntu VM and am
 authenticating using an Apache https web server.
 When I attempt to move a document within a space, by attempting to edit the
 parent, I get the error "Failed to retrieve suggestions: Internal Server
 Error" in the GUI when I type into the parent field. I also get a
 corresponding error in the Catalina log:
 Apr 04, 2014 11:29:09 AM org.restlet.engine.security.AuthenticatorUtils
 parseResponse
 WARNING: Couldn't find any helper support the HTTP_Digest challenge scheme.
 Apr 04, 2014 11:29:09 AM org.restlet.engine.application.StatusFilter
 doHandle
 WARNING: Exception or error caught in status service
 java.lang.NullPointerException
         at java.lang.String.<init>(String.java:168)
         at
 org.xwiki.rest.internal.XWikiSecretVerifier.verify(XWikiSecretVerifier.java:71)
         at
 org.restlet.security.SecretVerifier.verify(SecretVerifier.java:130)
         at
 org.restlet.security.ChallengeAuthenticator.authenticate(ChallengeAuthenticator.java:162)
         at
 org.xwiki.rest.internal.XWikiAuthentication.authenticate(XWikiAuthentication.java:133)
         at
 org.restlet.security.Authenticator.beforeHandle(Authenticator.java:122)
         at org.restlet.routing.Filter.handle(Filter.java:204)
         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:722)
         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
         at
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
         at
org.xwiki.wysiwyg.server.filter.XWikiContextInitializationFilter.doFilter(XWikiContextInitializationFilter.java:85)
         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
         at
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
         at
 com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66)
         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
         at
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
         at
org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
         at
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
         at
org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
         at
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
         at
 org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
         at
 org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
         at
 org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
         at
 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
         at
 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
         at
 org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
         at
 org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
         at
 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
         at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
         at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
         at
 org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
         at
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
         at
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
         at java.lang.Thread.run(Thread.java:744)
 This would lead me to believe that some part of XWiki does not like the
 fact that I am using Digest authentication; however, other than this, it
 would appear that XWiki is perfectly happy with my configuration.
 Does this error make any sense to someone out there?
 Thanks,
 Justin
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