On my installation, the Lucene search engine does not work. I get the same result (No matches found) without error messages when I'm signed out of the site as when signed in. I read Rebuilding the Search Index but /Data/Sites/[SiteID]/index is empty. Any ideas?

System informations:
mojoPortal 2.3.6.2 MSSQL
S.O. Microsoft Windows NT 5.2.3790 Service Pack 2
ASP.NET v2.0.50727 in 'Partial Trust'
W. Europe Standard Time
URL http://www.eumed.it/home.aspx.

Another question. Is it possible configure the search engine so that users can find things in search that they should not be able to see based on their role membership?

Thank you.

The control panel of my hosting shows the permissions set correctly, but the problem with shared files has been fixed by adding manually the directory  History. Can I do something like this for the search function?

Thanks, Joe. I followed your suggestion. I have deleted and manually re-created the folder /index. I also re-set the permissions but the research does not show results and the folder is empty.
If I delete the folder /index and do a search, the folder is automatically re-created, but is always empty.
I have to give up?

If I click the button to rebuild the search index, I see this:

  2011-03-06 22:27:38,812 INFO mojoPortal.Web.WebTaskManager - Queued WebTaskManager on a new thread

Nothing else. I also checked the log after 15 minutes.

In user.config, for the search function I have only this:

  <add key="ShowRebuildSearchIndexButtonToAdmins" value="true" />
  <add key="DisableSearchFeatureFilters" value="true" />
  <add key="SearchUseBackwardCompatibilityMode" value="false" />
  <add key="EnableSearchResultsHighlighting" value="false" />
  <add key="SearchIncludeModuleRoleFilters" value="true" />

The mp_IndexingQueue table is populated and mp_TaskQueue is empty. The SiteGuid field in mp_Sites is not empty.

I modified the Web.config as your suggestion with the exact path and I got this error (in italian):

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2011-03-07 22:37:59,135 ERROR mojoPortal.Web.mojoBasePage - 79.34.59.251-it-IT - /SearchResults.aspx?q=economia
System.UnauthorizedAccessException: Accesso alla directory TEMP negato. L'identità "WEBS184\ti.demue" con cui viene eseguito XmlSerializer non dispone di autorizzazioni sufficienti per accedere alla directory TEMP. CodeDom utilizzerà l'account utente utilizzato dal processo per eseguire la compilazione, pertanto se l'utente non ha accesso alla directory TEMP, non sarà possibile eseguire la compilazione.  Utilizzare Path.GetTempPath() API per scoprire la posizione della directory TEMP.
   in System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, XmlSerializerCompilerParameters xmlParameters, Evidence evidence)
   in System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters, Assembly assembly, Hashtable assemblies)
   in System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, String location, Evidence evidence)
   in System.Xml.Serialization.XmlSerializer.GenerateTempAssembly(XmlMapping xmlMapping, Type type, String defaultNamespace)
   in System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultNamespace)
   in System.Xml.Serialization.XmlSerializer..ctor(Type type)
   in mojoPortal.Business.SerializationHelper.SerializeToString(Object obj)
   in mojoPortal.Business.WebHelpers.IndexWriterTask.QueueTask()
   in mojoPortal.Web.SiteUtils.QueueIndexing()
   in mojoPortal.Web.UI.Pages.SearchResults.InitIndexIfNeeded()
   in mojoPortal.Web.UI.Pages.SearchResults.DoSearch()
   in mojoPortal.Web.UI.Pages.SearchResults.SetupInternalSearch()
   in mojoPortal.Web.UI.Pages.SearchResults.Page_Load(Object sender, EventArgs e)
   in System.Web.UI.Control.OnLoad(EventArgs e)
   in mojoPortal.Web.mojoBasePage.OnLoad(EventArgs e)
   in System.Web.UI.Control.LoadRecursive()
   in System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2011-03-07 22:37:59,166 ERROR mojoPortal.Web.Global - 79.34.59.251-it-IT - /SearchResults.aspx?q=economia
System.UnauthorizedAccessException: Accesso alla directory TEMP negato. L'identità "WEBS184\ti.demue" con cui viene eseguito XmlSerializer non dispone di autorizzazioni sufficienti per accedere alla directory TEMP. CodeDom utilizzerà l'account utente utilizzato dal processo per eseguire la compilazione, pertanto se l'utente non ha accesso alla directory TEMP, non sarà possibile eseguire la compilazione.  Utilizzare Path.GetTempPath() API per scoprire la posizione della directory TEMP.
   in System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, XmlSerializerCompilerParameters xmlParameters, Evidence evidence)
   in System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters, Assembly assembly, Hashtable assemblies)
   in System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, String location, Evidence evidence)
   in System.Xml.Serialization.XmlSerializer.GenerateTempAssembly(XmlMapping xmlMapping, Type type, String defaultNamespace)
   in System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultNamespace)
   in System.Xml.Serialization.XmlSerializer..ctor(Type type)
   in mojoPortal.Business.SerializationHelper.SerializeToString(Object obj)
   in mojoPortal.Business.WebHelpers.IndexWriterTask.QueueTask()
   in mojoPortal.Web.SiteUtils.QueueIndexing()
   in mojoPortal.Web.UI.Pages.SearchResults.InitIndexIfNeeded()
   in mojoPortal.Web.UI.Pages.SearchResults.DoSearch()
   in mojoPortal.Web.UI.Pages.SearchResults.SetupInternalSearch()
   in mojoPortal.Web.UI.Pages.SearchResults.Page_Load(Object sender, EventArgs e)
   in System.Web.UI.Control.OnLoad(EventArgs e)
   in mojoPortal.Web.mojoBasePage.OnLoad(EventArgs e)
   in System.Web.UI.Control.LoadRecursive()
   in System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

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After that, the mp_TaskQueue table shows data.

Salve Marco. Rispondo in italiano.

Vedo che il tuo sito è su Aruba. Ho effettuato numerose prove ma ho risolto il problema da pochi giorni, dopo un'installazione pulita su un dababase vuoto, rivolgendomi al loro servizio di assistenza. Dopo il loro intervento consigliano di rigenerare l'indicizzazione del sito, come riportato su:

http://www.mojoportal.com/rebuilding-the-search-index.aspx

In alternativa (ma non l'ho provata), consigliano di rinominare la cartella  ../Data/Sites/[1]/index/,  crearne una nuova e attribuire i permessi di lettura e scrittura tramite il Permission Manager.