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https://issues.apache.org/jira/browse/LUCENENET-113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590658#action_12590658
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Pauli Østerø commented on LUCENENET-113:
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Depends on if that is really the case. Seeing that Windows reports "DELETE
PEND" and NOT (!) ACCESS DENIED via FileMon confirms my suspecion that this is
really not a File Access issue. Looking into the directory after this error is
thrown also reveals that the file doesn't exists. This was actually was puzzled
me the most at first, because how could .Net throw an Access Denied error on a
files thats really not there.
I have tried to find any component that might could have a lock on the files,
but there is no antivirus, no defragmenting programs, no nothing.
Seeing that this is exception is thrown only sometimes, and can be "solved" by
doing a thread-sleep, and thereby slowing down the process of deletion and
creating the segments.gen file also raises my suspecion to the lock-less method
of updating an index. I can show you a dump of my FileMon trace if it helps.
> 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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