Hi,

I am using Umbraco v7.5.3.

We have a situation where (due to some bad decisions made when importing some data) we have a site that has lots of duplicate content which needs to be deleted.

I have written some code which identifies the content to be deleted and then sits in a loop attempting to delete them using the Content Service.

However, when running the code I repeatedly get a Lucene exception - "this IndexWriter is closed".

Can anyone suggest what the problem might be and how I should go about fixing it, please?!

A fragment of the code I am using, and the stack trace are below...

// Delete the articles whose names end with ")"
foreach (IPublishedContent ArticleToDelete in MatchingNews.Where(x => x.Name.EndsWith(")")))
{
    IContent ContentToDelete = ContentSvc.GetById(ArticleToDelete.Id);
    ContentSvc.Delete(ContentToDelete);
}

[AlreadyClosedException: this IndexWriter is closed]
   Lucene.Net.Index.IndexWriter.EnsureOpen(Boolean includePendingClose) +140
   Lucene.Net.Index.IndexWriter.GetDirectory() +12
   Examine.LuceneEngine.Providers.LuceneSearcher.GetLuceneDirectory() in X:\Projects\Examine\Examine\Projects\Examine\LuceneEngine\Providers\LuceneSearcher.cs:254
   Examine.LuceneEngine.Providers.LuceneSearcher.ValidateSearcher(Boolean forceReopen) in X:\Projects\Examine\Examine\Projects\Examine\LuceneEngine\Providers\LuceneSearcher.cs:277
   Examine.LuceneEngine.Providers.LuceneSearcher.GetSearchFields() in X:\Projects\Examine\Examine\Projects\Examine\LuceneEngine\Providers\LuceneSearcher.cs:238
   Examine.LuceneEngine.Providers.BaseLuceneSearcher.CreateSearchCriteria(String type, BooleanOperation defaultOperation) in X:\Projects\Examine\Examine\Projects\Examine\LuceneEngine\Providers\BaseLuceneSearcher.cs:117
   Examine.LuceneEngine.Providers.BaseLuceneSearcher.CreateSearchCriteria() in X:\Projects\Examine\Examine\Projects\Examine\LuceneEngine\Providers\BaseLuceneSearcher.cs:212
   UmbracoExamine.UmbracoContentIndexer.DeleteFromIndex(String nodeId) +118
   Examine.ExamineManager._DeleteFromIndex(String nodeId, IEnumerable`1 providers) in X:\Projects\Examine\Examine\Projects\Examine\ExamineManager.cs:213
   Umbraco.Web.Search.ExamineEvents.DeleteIndexForEntity(Int32 entityId, Boolean keepIfUnpublished) +251
   Umbraco.Web.Search.ExamineEvents.PublishedPageCacheRefresherCacheUpdated(PageCacheRefresher sender, CacheRefresherEventArgs e) +281
   Umbraco.Core.Events.TypedEventHandler`2.Invoke(TSender sender, TEventArgs e) +0
   Umbraco.Core.Cache.CacheRefresherBase`1.OnCacheUpdated(TInstanceType sender, CacheRefresherEventArgs args) +49
   Umbraco.Core.Cache.TypedCacheRefresherBase`2.Remove(TEntityType instance) +86
   Umbraco.Web.Cache.PageCacheRefresher.Remove(IContent instance) +144
   Umbraco.Core.Sync.ServerMessengerBase.DeliverLocal(ICacheRefresher refresher, MessageType messageType, Func`2 getId, IEnumerable`1 instances) +577
   Umbraco.Core.Sync.ServerMessengerBase.Deliver(IEnumerable`1 servers, ICacheRefresher refresher, MessageType messageType, Func`2 getId, IEnumerable`1 instances) +134
   Umbraco.Core.Sync.ServerMessengerBase.PerformRemove(IEnumerable`1 servers, ICacheRefresher refresher, Func`2 getNumericId, T[] instances) +222
   Umbraco.Web.Cache.DistributedCache.Remove(Guid factoryGuid, Func`2 getNumericId, T[] instances) +192
   Umbraco.Web.Cache.DistributedCacheExtensions.RemovePageCache(DistributedCache dc, IContent[] content) +236
   Umbraco.Web.Cache.CacheRefresherEventHandler.UnPublishSingle(IContent content) +47
   Umbraco.Web.Cache.CacheRefresherEventHandler.PublishingStrategy_UnPublished(IPublishingStrategy sender, PublishEventArgs`1 e) +188
   Umbraco.Core.Events.TypedEventHandler`2.Invoke(TSender sender, TEventArgs e) +0
   Umbraco.Core.Events.EventExtensions.RaiseEvent(TypedEventHandler`2 eventHandler, TArgs args, TSender sender) +16
   Umbraco.Core.Publishing.PublishingStrategy.UnPublishingFinalized(IContent content) +121
   Umbraco.Core.Services.ContentService.UnPublishDo(IContent content, Boolean omitCacheRefresh, Int32 userId) +852
   Umbraco.Core.Services.ContentService.Umbraco.Core.Services.IContentServiceOperations.UnPublish(IContent content, Int32 userId) +15
   Umbraco.Core.Services.ContentService.Umbraco.Core.Services.IContentServiceOperations.Delete(IContent content, Int32 userId) +319
   Umbraco.Core.Services.ContentService.Delete(IContent content, Int32 userId) +26
   xxxxWebsite.Controllers.DataController.DeleteDuplicateNews() in C:\Projects\Clients\xxxx Website\xxxxWebsite\Controllers\DataController.cs:149
   lambda_method(Closure , ControllerBase , Object[] ) +61
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +157
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22
   System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +50
   System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +225
   System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +225
   System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +26
   System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +38
   System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +28
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9765121
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155