invalid deletion count: 41 vs docCount=29 (resource: BufferedChecksumIndexInput(SimpleFSIndexInput(path="C:\home\site\wwwroot\umbraco\Data\TEMP\ExamineIndexes\ExternalIndex\segments_d5")))

[PeterAtValantic]

Hi,

As a followup from umbraco/Umbraco-CMS#16163
(I will answer below your suggestions)

• Ensure that the Examine assembly deployed is in fact the latest version

  • I deploy from Visual Studio and yesterday I have manually removed all dll files and redeployed it all.

• Provide as much information as possible and potentially steps to replicate

  • Stack traces

at Lucene.Net.Index.IndexFileDeleter..ctor(Directory directory, IndexDeletionPolicy policy, SegmentInfos segmentInfos, InfoStream infoStream, IndexWriter writer, Boolean initialIndexExists)
Lucene.Net.Index.IndexWriter..ctor(Directory d, IndexWriterConfig conf)
Examine.Lucene.Directories.SyncedFileSystemDirectoryFactory.GetIndexWriter(Directory mainDir, OpenMode openMode)
Examine.Lucene.Directories.SyncedFileSystemDirectoryFactory.TryGetIndexWriter(OpenMode openMode, Directory luceneDirectory, Boolean createNewIfCorrupt, String indexName, IndexWriter& indexWriter)
Examine.Lucene.Directories.SyncedFileSystemDirectoryFactory.TryCreateDirectory(LuceneIndex luceneIndex, Boolean forceUnlock, Directory& directory)
Examine.Lucene.Directories.SyncedFileSystemDirectoryFactory.CreateDirectory(LuceneIndex luceneIndex, Boolean forceUnlock) Examine.Lucene.Directories.DirectoryFactoryBase.<>c__DisplayClass2_0.<Examine.Lucene.Directories.IDirectoryFactory.CreateDirectory>b__0(String s)
System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func2 valueFactory)
Examine.Lucene.Directories.DirectoryFactoryBase.Examine.Lucene.Directories.IDirectoryFactory.CreateDirectory(LuceneIndex luceneIndex, Boolean forceUnlock)
Umbraco.Cms.Infrastructure.Examine.ConfigurationEnabledDirectoryFactory.CreateDirectory(LuceneIndex luceneIndex, Boolean forceUnlock) Examine.Lucene.Directories.DirectoryFactoryBase.<>c__DisplayClass2_0.<Examine.Lucene.Directories.IDirectoryFactory.CreateDirectory>b__0(String s)
System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func2 valueFactory)
Examine.Lucene.Directories.DirectoryFactoryBase.Examine.Lucene.Directories.IDirectoryFactory.CreateDirectory(LuceneIndex luceneIndex, Boolean forceUnlock)
Examine.Lucene.Providers.LuceneIndex.<>c__DisplayClass1_0.<.ctor>b__0()
System.Lazy1.ViaFactory(LazyThreadSafetyMode mode) System.Lazy1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
System.Lazy1.CreateValue() System.Lazy1.get_Value()
Examine.Lucene.Providers.LuceneIndex.GetLuceneDirectory()
Examine.Lucene.Providers.LuceneIndex.IndexExistsImpl()
Examine.Lucene.Providers.LuceneIndex.IndexExists()
Examine.Lucene.Providers.LuceneIndex.EnsureIndex(Boolean forceOverwrite)
Examine.Lucene.Providers.LuceneIndex.get_IndexWriter()
Examine.Lucene.Providers.LuceneIndex.CreateSearcher()
System.Lazy1.ViaFactory(LazyThreadSafetyMode mode) System.Lazy1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
System.Lazy1.CreateValue() System.Lazy1.get_Value()
Examine.Lucene.Providers.LuceneIndex.get_Searcher()
SuperBold.Framework.UmbracoCustom.Services.SiteService.GetInitialQuery(String indexName, Boolean allowLeadingWildcard, Boolean onlyVisible)
AspNetCore.Views_Partials_BlockList_Components_itemMainNavigation.ExecuteAsync() in C:\home\site\wwwroot\Views\Partials\BlockList\Components\itemMainNavigation.cshtml:line 56
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.RenderPartialCoreAsync(String partialViewName, Object model, ViewDataDictionary viewData, TextWriter writer)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.PartialAsync(String partialViewName, Object model, ViewDataDictionary viewData)
AspNetCore.Views_Partials_Blocklist_custom.ExecuteAsync() in C:\home\site\wwwroot\Views\Partials\Blocklist\custom.cshtml:line 18
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.RenderPartialCoreAsync(String partialViewName, Object model, ViewDataDictionary viewData, TextWriter writer)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.PartialAsync(String partialViewName, Object model, ViewDataDictionary viewData)
AspNetCore.Views_Partials_Menu.ExecuteAsync() in C:\home\site\wwwroot\Views\Partials\Menu.cshtml:line 93
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.RenderPartialCoreAsync(String partialViewName, Object model, ViewDataDictionary viewData, TextWriter writer)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.PartialAsync(String partialViewName, Object model, ViewDataDictionary viewData)
AspNetCore.Views_Master.<>c__DisplayClass34_0.<<ExecuteAsync>b__1>d.MoveNext() in C:\home\site\wwwroot\Views\Master.cshtml:line 103--- End of stack trace from previous location ---
Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperExecutionContext.SetOutputContentAsync()
AspNetCore.Views_Master.ExecuteAsync() in C:\home\site\wwwroot\Views\Master.cshtml:line 99
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderLayoutAsync(ViewContext context, ViewBufferTextWriter bodyWriter)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, String contentType, Nullable1 statusCode) Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, String contentType, Nullable1 statusCode)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ActionContext actionContext, IView view, ViewDataDictionary viewData, ITempDataDictionary tempData, String contentType, Nullable`1 statusCode)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.ExecuteAsync(ActionContext context, ViewResult result)
Microsoft.AspNetCore.Mvc.ViewResult.ExecuteResultAsync(ActionContext context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|30_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()--- End of stack trace from previous location ---
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()--- End of stack trace from previous location ---
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Umbraco.Cms.Web.Common.Middleware.BasicAuthenticationMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.InterfaceMiddlewareBinder.<>c__DisplayClass2_0.<<CreateMiddleware>b__0>d.MoveNext()--- End of stack trace from previous location ---
Umbraco.Cms.Web.BackOffice.Middleware.BackOfficeExternalLoginProviderErrorMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.InterfaceMiddlewareBinder.<>c__DisplayClass2_0.<<CreateMiddleware>b__0>d.MoveNext()--- End of stack trace from previous location ---
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Localization.RequestLocalizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
StackExchange.Profiling.MiniProfilerMiddleware.Invoke(HttpContext context) in C:\projects\dotnet\src\MiniProfiler.AspNetCore\MiniProfilerMiddleware.cs:line 112
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.InterfaceMiddlewareBinder.<>c__DisplayClass2_0.<<CreateMiddleware>b__0>d.MoveNext()--- End of stack trace from previous location ---
Umbraco.Cms.Web.Common.Middleware.PreviewAuthenticationMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.InterfaceMiddlewareBinder.<>c__DisplayClass2_0.<<CreateMiddleware>b__0>d.MoveNext()--- End of stack trace from previous location ---
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestLoggingMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.InterfaceMiddlewareBinder.<>c__DisplayClass2_0.<<CreateMiddleware>b__0>d.MoveNext()--- End of stack trace from previous location ---
SeoToolkit.Umbraco.Redirects.Core.Middleware.RedirectMiddleware.Invoke(HttpContext context)
SeoToolkit.Umbraco.RobotsTxt.Core.Middleware.RobotsTxtMiddleware.Invoke(HttpContext context)
SeoToolkit.Umbraco.Sitemap.Core.Middleware.SitemapMiddleware.Invoke(HttpContext context, ISitemapGenerator sitemapGenerator, ISitemapIndexGenerator sitemapIndexGenerator)
SixLabors.ImageSharp.Web.Middleware.ImageSharpMiddleware.Invoke(HttpContext httpContext, Boolean retry)
Umbraco.Forms.Web.HttpModules.ProtectFormUploadRequestsMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.InterfaceMiddlewareBinder.<>c__DisplayClass2_0.<<CreateMiddleware>b__0>d.MoveNext()--- End of stack trace from previous location ---
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddlewareImpl.<Invoke>g__Awaited|10_0(ExceptionHandlerMiddlewareImpl middleware, HttpContext context, Task task).

• What indexes get corrupt, 1, 2, all, etc...
  • most of the time: ExternalIndex, but I have also seen that the other indexes are getting corrupt as well: CustomExternalIndex, InternalIndex
• Any relevant config
  • depends what part of the config you find relevant, but I have this:

"Umbraco": {
"CMS": {
"RuntimeMinification": {
"UseInMemoryCache": true,
},
"Global": {
"MainDomLock": "FileSystemMainDomLock"
},
"Hosting": {
"LocalTempStorageLocation": "EnvironmentTemp"
},
"Examine": {
"LuceneDirectoryFactory": "SyncedTempFileSystemDirectoryFactory"
}
}

I am on Umbraco 13.5.3 (latest version of Umbraco 13) an the latest version of Examine.

It occurs at random, but also often I have deployed from Visual Studio. First I stop the application and then I press publish and then I start the application and then when I visit the web application I get a 502 error and I see this error in the log.

To replicate:
I am on an Azure App Service. Not Loadbalanced.

These are my Publsih settings:

• Configuration: Debug
• Target Framework: net8.0
• Deployment Mode: Framework-dependent
• Target Runtime: Portable
• File Publish Options: Remove additional files at destination -> unchecked
• Other checkboxes of other settings are also unchecked

Server configuration:

• Web app
  • Publishing model: Code
  • Runtime Stack: Dotnetcore
• Hosting
  • Plan Type: App Service plan
  • Operating System: Windows
• Platform settings
  • Platform: 32 bit
  • Managed pipeline version: Integrated

Please let me know what other settings you need to know.

[Shazwazza]

@PeterAtValantic any chance you have the log outputs for these statements?

• Examine/src/Examine.Lucene/Directories/SyncedFileSystemDirectoryFactory.cs

  Line 229 in 6ec92e4

  _logger.LogError(ex, "{IndexName} index is corrupt, a new one will be created", indexName);

• Examine/src/Examine.Lucene/Directories/SyncedFileSystemDirectoryFactory.cs

  Lines 284 to 325 in 6ec92e4

  	_logger.LogDebug("{IndexName} health check report {IndexReport}", indexName, writer.ToString());
  	if (status.MissingSegments)
  	{
  	_logger.LogWarning("{IndexName} index is missing segments, it will be deleted.", indexName);
  	result = CreateResult.MissingSegments;
  	}
  	else if (!status.Clean)
  	{
  	_logger.LogWarning("Checked main index {IndexName} and it is not clean.", indexName);
  	result = CreateResult.NotClean;
  	if (doFix)
  	{
  	_logger.LogWarning("Attempting to fix {IndexName}. {DocumentsLost} documents will be lost.", indexName, status.TotLoseDocCount);
  	try
  	{
  	checker.FixIndex(status);
  	status = checker.DoCheckIndex();
  	if (!status.Clean)
  	{
  	_logger.LogError("{IndexName} index could not be fixed, it will be deleted.", indexName);
  	result |= CreateResult.NotFixed;
  	}
  	else
  	{
  	_logger.LogInformation("Index {IndexName} fixed. {DocumentsLost} documents were lost.", indexName, status.TotLoseDocCount);
  	result |= CreateResult.Fixed;
  	}
  	}
  	catch (Exception ex)
  	{
  	_logger.LogError(ex, "{IndexName} index could not be fixed, it will be deleted.", indexName);
  	result |= CreateResult.ExceptionNotFixed;
  	}
  	}
  	}
  	else
  	{
  	_logger.LogInformation("Checked main index {IndexName} and it is clean.", indexName);

[readingdancer]

@Shazwazza - I hope you are well?

We are still getting this error on Umbraco Cloud, we are running your latest versions of Examine, but still no joy. I have just dropped an email to your hotmail email account, I hope that still works :)

Chris

[PeterAtValantic]

@Shazwazza Yes, I have those:

Timestamp 2025-02-07T14:22:08.7675053+00:00
@MessageTemplate Checked main index {IndexName} and it is clean.
IndexName InternalIndex
SourceContext
ActionId 70f783a3-fe27-4c79-a0d0-18e69cf2551e
ActionName Umbraco.Cms.Web.BackOffice.Controllers.EntityController.SearchAll (Umbraco.Web.BackOffice)
RequestId 40000022-0000-f500-b63f-84710c7967bb
RequestPath /umbraco/backoffice/umbracoapi/entity/SearchAll
ProcessId 6260
ProcessName w3wp
ThreadId 25
ApplicationId ea6c9907b5dfb977abd279e5dd977d85f29f78cb
MachineName
Log4NetLevel INFO
HttpRequestId 8efd5241-14fc-48ee-b33c-8bce8fef87e5
HttpRequestNumber
HttpSessionId e28e401d-9ed3-e91a-1aa4-3a4f1e7c4403

Feb 7, 2025 3:22:08 PM Error WN1MDWK0003OG "InternalIndex" index is corrupt, a new one will be created
Lucene.Net.Index.CorruptIndexException: invalid deletion count: 79 vs docCount=18 (resource: BufferedChecksumIndexInput(SimpleFSIndexInput(path="C:\home\site\wwwroot\umbraco\Data\TEMP\ExamineIndexes\InternalIndex\segments_ff")))
at Lucene.Net.Index.SegmentInfos.Read(Directory directory, String segmentFileName)
at Lucene.Net.Index.IndexFileDeleter..ctor(Directory directory, IndexDeletionPolicy policy, SegmentInfos segmentInfos, InfoStream infoStream, IndexWriter writer, Boolean initialIndexExists)
at Lucene.Net.Index.IndexWriter..ctor(Directory d, IndexWriterConfig conf)
at Examine.Lucene.Directories.SyncedFileSystemDirectoryFactory.GetIndexWriter(Directory mainDir, OpenMode openMode)
at Examine.Lucene.Directories.SyncedFileSystemDirectoryFactory.TryGetIndexWriter(OpenMode openMode, Directory luceneDirectory, Boolean createNewIfCorrupt, String indexName, IndexWriter& indexWriter)
Timestamp 2025-02-07T14:22:08.835312+00:00
@MessageTemplate {IndexName} index is corrupt, a new one will be created
IndexName InternalIndex
SourceContext
ActionId 70f783a3-fe27-4c79-a0d0-18e69cf2551e
ActionName Umbraco.Cms.Web.BackOffice.Controllers.EntityController.SearchAll (Umbraco.Web.BackOffice)
RequestId 40000022-0000-f500-b63f-84710c7967bb
RequestPath /umbraco/backoffice/umbracoapi/entity/SearchAll
ProcessId 6260
ProcessName w3wp
ThreadId 25
ApplicationId ea6c9907b5dfb977abd279e5dd977d85f29f78cb
MachineName
Log4NetLevel ERROR
HttpRequestId 8efd5241-14fc-48ee-b33c-8bce8fef87e5
HttpRequestNumber
HttpSessionId e28e401d-9ed3-e91a-1aa4-3a4f1e7c4403

Feb 4, 2025 11:07:37 AM Warning WN1MDWK0003IF "ExternalIndex" index is missing segments, it will be deleted.
Timestamp 2025-02-04T10:07:37.8782717+00:00
@MessageTemplate {IndexName} index is missing segments, it will be deleted.
IndexName ExternalIndex
SourceContext
ActionId e446cc63-263f-4761-b480-fe0ca2bb8187
ActionName Umbraco.Cms.Web.Common.Controllers.RenderController.Index (Umbraco.Web.Common)
RequestId 40000038-0000-f100-b63f-84710c7967bb
RequestPath /
ProcessId 4876
ProcessName w3wp
ThreadId 14
ApplicationId ea6c9907b5dfb977abd279e5dd977d85f29f78cb
MachineName
Log4NetLevel WARN
HttpRequestId d9154b2d-3cc5-43f2-a23f-097f23078b05
HttpRequestNumber
HttpSessionId a2db047a-2211-69fc-3d47-57071bf952f8

I also found this error, but I am not sure if it caused by a deployment or not.

System.ObjectDisposedException: this Directory is disposed.
Object name: 'Lucene.Net.Store.NRTCachingDirectory'.
at Lucene.Net.Store.NRTCachingDirectory.OpenInput(String name, IOContext context)
at Lucene.Net.Replicator.LocalReplicator.ObtainFile(String sessionId, String source, String fileName)
at Lucene.Net.Replicator.ReplicationClient.DoUpdate()
at Lucene.Net.Replicator.ReplicationClient.ReplicationThread.Run()
Timestamp 2025-02-04T09:41:11.5131309+00:00
@MessageTemplate Index replication error occurred
SourceContext
ActionId 09891039-f317-4981-b350-b9cba37f0d2f
ActionName Umbraco.Cms.Web.Common.Controllers.RenderController.Index (Umbraco.Web.Common)
RequestId 40000077-0003-f900-b63f-84710c7967bb
RequestPath /
ProcessId 7752
ProcessName w3wp
ThreadId 34
ApplicationId ea6c9907b5dfb977abd279e5dd977d85f29f78cb
MachineName
Log4NetLevel ERROR
HttpRequestId be5b3aa4-da88-4855-b0d0-5cb36b5649f2
HttpRequestNumber
HttpSessionId 0

and also this one:

Feb 4, 2025 11:08:30 AM Error wn1mdwk00045G Index replication error occurred
System.IO.FileNotFoundException: File not found: C:\home\site\wwwroot\umbraco\Data\TEMP\ExamineIndexes\ExternalIndex_es.fnm
at Lucene.Net.Support.IO.WindowsFsyncSupport.HandleWrapper..ctor(String path, Boolean isDir)
at Lucene.Net.Support.IO.WindowsFsyncSupport.Fsync(String path, Boolean isDir)
at Lucene.Net.Util.IOUtils.Fsync(String fileToSync, Boolean isDir)
at Lucene.Net.Store.FSDirectory.Fsync(String name)
at Lucene.Net.Store.FSDirectory.Sync(ICollection1 names) at Lucene.Net.Store.NRTCachingDirectory.Sync(ICollection1 fileNames)
at Lucene.Net.Replicator.IndexReplicationHandler.RevisionReady(String version, IDictionary2 revisionFiles, IDictionary2 copiedFiles, IDictionary`2 sourceDirectory)
at Lucene.Net.Replicator.ReplicationClient.DoUpdate()
at Lucene.Net.Replicator.ReplicationClient.ReplicationThread.Run()
Timestamp 2025-02-04T10:08:30.8081664+00:00
@MessageTemplate Index replication error occurred
SourceContext
ActionId 544ce548-c25e-43ea-8a57-de24df3e77ec
ActionName Umbraco.Cms.Web.Common.Controllers.RenderController.Index (Umbraco.Web.Common)
RequestId 40000003-0001-f500-b63f-84710c7967bb
RequestPath /
ProcessId 4968
ProcessName w3wp
ThreadId 33
ApplicationId ea6c9907b5dfb977abd279e5dd977d85f29f78cb
MachineName
Log4NetLevel ERROR
HttpRequestId 7714cad2-b83d-4ab6-968f-7b3785a7ce77
HttpRequestNumber
HttpSessionId 0

If you need more logs (I can imagine the first logs before and right after the index occurred would be interesting), please let me know