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https://issues.apache.org/jira/browse/LUCENENET-388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12984844#action_12984844
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Digy commented on LUCENENET-388:
--------------------------------

Also note that, if a thread crashes with an unhandled exception, this would 
kill the app.
using  {{<legacyUnhandledExceptionPolicy enabled="1"/>}}   in app.config or 
attaching to the event  {{AppDomain.CurrentDomain.UnhandledException}}  may be 
a solution.

DIGY

> Exception: will crash and restart the web-application.
> ------------------------------------------------------
>
>                 Key: LUCENENET-388
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-388
>             Project: Lucene.Net
>          Issue Type: Bug
>         Environment: IIS7, Windows 7, Lucene.Net 2.9.1
>            Reporter: Patric Forsgard
>            Priority: Critical
>
> When getting the followin exception, the iis thread is crashing and the site 
> is restarting. I think it should get the exception, but it should not crash 
> the site and restart the application each time.
> -------------------------------------------
> System.SystemException was unhandled
>   Message=there are more terms than documents in field "TypeName", but it's 
> impossible to sort on tokenized fields
>   Source=Lucene.Net
>   StackTrace:
>        at 
> Lucene.Net.Search.FieldCacheImpl.StringIndexCache.CreateValue(IndexReader 
> reader, Entry entryKey)
>        at Lucene.Net.Search.FieldCacheImpl.Cache.Get(IndexReader reader, 
> Entry key)
>        at Lucene.Net.Search.FieldCacheImpl.GetStringIndex(IndexReader reader, 
> String field)
>        at 
> Lucene.Net.Search.FieldComparator.StringOrdValComparator.SetNextReader(IndexReader
>  reader, Int32 docBase)
>        at 
> Lucene.Net.Search.TopFieldCollector.OneComparatorNonScoringCollector.SetNextReader(IndexReader
>  reader, Int32 docBase)
>        at Lucene.Net.Search.IndexSearcher.Search(Weight weight, Filter 
> filter, Collector collector)
>        at Lucene.Net.Search.IndexSearcher.Search(Weight weight, Filter 
> filter, Int32 nDocs, Sort sort, Boolean fillFields)
>        at Lucene.Net.Search.IndexSearcher.Search(Weight weight, Filter 
> filter, Int32 nDocs, Sort sort)
>        at Lucene.Net.Search.MultiSearcherThread.Run()
>        at System.Threading.ExecutionContext.runTryCode(Object userData)
>        at 
> System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode
>  code, CleanupCode backoutCode, Object userData)
>        at System.Threading.ExecutionContext.Run(ExecutionContext 
> executionContext, ContextCallback callback, Object state)
>        at System.Threading.ThreadHelper.ThreadStart()
>   InnerException: 

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