Hi,

I have a website running Umbraco 7.15.5 in Azure and it crashed giving the following message:

2020-09-10 12:03:05,226 [P8240/D11/T84] WARN  Umbraco.Web.UmbracoModule - Status code is 404 yet TrySkipIisCustomErrors is false - IIS will take over.

2020-09-10 12:03:11,724 [P8240/D11/T76] WARN Umbraco.Web.UmbracoModule - Status code is 404 yet TrySkipIisCustomErrors is false - IIS will take over. 2020-09-10 12:03:20,528 [P8240/D11/T75] ERROR Umbraco.Core.UmbracoApplicationBase - An unhandled exception occurred System.Exception: Exception while creating a value. ---> System.IO.IOException: An unexpected network error occurred.

at System.IO.Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.ReadCore(Byte[] buffer, Int32 offset, Int32 count) at System.IO.FileStream.Read(Byte[] array, Int32 offset, Int32 count) at Lucene.Net.Store.SimpleFSDirectory.SimpleFSIndexInput.ReadInternal(Byte[] b, Int32 offset, Int32 len) at Lucene.Net.Store.BufferedIndexInput.Refill() at Lucene.Net.Store.BufferedIndexInput.ReadByte() at Lucene.Net.Store.IndexInput.ReadVInt() at Lucene.Net.Index.FieldsReader.Doc(Int32 n, FieldSelector fieldSelector) at Examine.LuceneEngine.SearchResults.CreateFromDocumentItem(Int32 i) at Examine.LuceneEngine.SearchResults.26.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source) at Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedMediaCache.GetUmbracoMediaCacheValues(Int32 id) at Umbraco.Core.Cache.DictionaryCacheProviderBase.<>c__DisplayClass10_0.<GetSafeLazy>b__0() --- End of inner exception stack trace --- at Umbraco.Core.Cache.HttpRuntimeCacheProvider.GetCacheItemInternal(String cacheKey, Func1 getCacheItem, Nullable1 timeout, Boolean isSliding, CacheItemPriority priority, CacheItemRemovedCallback removedCallback, Func1 dependency) at Umbraco.Core.Cache.HttpRuntimeCacheProvider.GetCacheItem(String cacheKey, Func1 getCacheItem, Nullable1 timeout, Boolean isSliding, CacheItemPriority priority, CacheItemRemovedCallback removedCallback, String[] dependentFiles) at Umbraco.Core.Cache.DeepCloneRuntimeCacheProvider.GetCacheItem(String cacheKey, Func1 getCacheItem, Nullable1 timeout, Boolean isSliding, CacheItemPriority priority, CacheItemRemovedCallback removedCallback, String[] dependentFiles) at Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedMediaCache.GetCacheValues(Int32 id, Func2 func) at Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedMediaCache.GetUmbracoMedia(Int32 id) at Umbraco.Web.PublishedCache.ContextualPublishedCache1.GetById(Boolean preview, Int32 contentId) at Umbraco.Web.UmbracoHelper.TypedMedia(Guid id) at Umbraco.Web.UmbracoHelper.TypedMedia(Udi id) at Umbraco.Web.PropertyEditors.ValueConverters.MediaPickerPropertyConverter.ConvertSourceToObject(PublishedPropertyType propertyType, Object source, Boolean preview) at Umbraco.Web.PublishedCache.XmlPublishedCache.XmlPublishedProperty.getValue() at Umbraco.Web.PublishedPropertyExtension.GetValue[T](IPublishedProperty property, Boolean withDefaultValue, T defaultValue) at Umbraco.Web.PublishedContentExtensions.GetPropertyValue[T](IPublishedContent content, String alias) at ASP.PageViewsSharedRelatedContentcshtml.Execute() in D:\home\site\wwwroot\Views\Shared\RelatedContent.cshtml:line 33 at System.Web.WebPages.WebPageBase.ExecutePageHierarchy() at System.Web.Mvc.WebViewPage.ExecutePageHierarchy() at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) at Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer) at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData) at ASP.PageViewsstartPageIndexcshtml.Execute() in D:\home\site\wwwroot\Views\startPage\Index.cshtml:line 79 at System.Web.WebPages.WebPageBase.ExecutePageHierarchy() at System.Web.Mvc.WebViewPage.ExecutePageHierarchy() at System.Web.WebPages.StartPage.ExecutePageHierarchy() at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) at Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer) at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList1 filters, ActionResult actionResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass3_1.<BeginInvokeAction>b__1(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) at System.Web.Mvc.Controller.<>c.<BeginExecuteCore>b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) at System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) at System.Web.Mvc.MvcHandler.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.<>cDisplayClass2850.

How can I solve it?

I hard to restart the website in order to get it working again.

I saw this post: https://our.umbraco.com/forum/extending-umbraco-and-using-the-api/74731-examine-corruption-issues#comment-246649

but I don't really understand if it is a solution to the problem and how to implement it.

• Is "useTempStorage="Sync"" an appkey setting in web.config? Should this only be used in production?

• "Remove the {machinename} token from your index path" where is the index path and how do I find it to remove it?

• "RebuildOnAppStart="true" - since this should only happen one time" Is this also an appkey setting in web.config? Can this be run locally or the setting should only be in production?

• How do I know if the site is autoscaling or not? Since I don't know it probably isn't, I guess?

• And how do I implement this feature? The feature is from 2016 so it might be too old too? https://issues.umbraco.org/issue/U4-7614