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From "Digy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENENET-113) adding documents to index does, in rare cases, cause an access denied to segments.gen
Date Fri, 18 Apr 2008 21:14:21 GMT

    [ https://issues.apache.org/jira/browse/LUCENENET-113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590616#action_12590616
] 

Digy commented on LUCENENET-113:
--------------------------------

UnauthorizedAccessException means that another process is using your file(or you have no enough
right to open that file).  This is not a bug of Windows or Lucene, it is an default behaviour
of all operating systems. 

I think, it is not a preferred case to hide an error reported by the OS in libraries like
Lucene if  it can not handle it.
Think of a case where your disk is full and AddDocument tries to throw an exception. Which
one is better, hiding the exception in Lucene or passing it to the application?

DIGY.

> adding documents to index does, in rare cases, cause an access denied to segments.gen
> -------------------------------------------------------------------------------------
>
>                 Key: LUCENENET-113
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-113
>             Project: Lucene.Net
>          Issue Type: Bug
>         Environment: Windows 2003
> Lucene.Net 2.1.0.3
>            Reporter: Pauli Østerø
>            Priority: Critical
>
> When updating an index via an indexwriter, does cause an access denied for segments.gen.
> After investigation with FileMon the problem seems to be Lucene deleting and creating
the segments.gen with such a speed, that Windows occasionally reports "DELETE PEND" when trying
to open the file, which causes Lucene to crash.
> A quick fix has been to do a try-catch when adding documents, and sleeping the thread
for 100 ms when encountering the UnathorizedException and trying to add the document again.

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