Version 4.10.4. Sorry we are woefully behind.

Stuart M Goldberg

Senior Vice President of Software Develpment
*FIX Flyer LLC*
http://www.FIXFlyer.com/ <http://www.fixflyer.com/>

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On Fri, Jul 20, 2018 at 1:10 PM Michael McCandless <
luc...@mikemccandless.com> wrote:

> Yeah it is surprising that Lucene applied that one delete when you said it
> didn't have to.
>
> Which Lucene version?
>
> Mike McCandless
>
> http://blog.mikemccandless.com
>
> On Thu, Jul 19, 2018 at 5:54 PM, Stuart Goldberg <sgoldb...@fixflyer.com>
> wrote:
>
>> Understood. But I would think that in a tiny program where I add one
>> document and then update it, that the load is so small that it for sure
>> would not have applied the delete.
>>
>> Why am I wrong in thinking this?
>>
>>
>> On Thu, Jul 19, 2018, 5:50 PM Michael McCandless <
>> luc...@mikemccandless.com> wrote:
>>
>>> Passing applyDeletes=false means Lucene does not have to apply all of
>>> its buffered deletes.
>>>
>>> But, it still may have already applied some deletes, so there's no
>>> guarantee that it won't have applied deletes.
>>>
>>> Mike McCandless
>>>
>>> http://blog.mikemccandless.com
>>>
>>> On Thu, Jul 19, 2018 at 3:23 PM, Stuart Goldberg <sgoldb...@fixflyer.com
>>> > wrote:
>>>
>>>> I used NRT readers all the time. I create then with 'applyDeletes' set
>>>> to
>>>> false for performance reasons and take the javadoc at its word that my
>>>> code
>>>> has to be prepared to deal with deleted documents. I thought I
>>>> understood
>>>> that and I wrote my code to be deleted-document-safe.
>>>>
>>>> But I have recently revisited the issue and tried to understand what
>>>> happens using a little test program. I create a document and add it to
>>>> the
>>>> index. I then create a new document that mirrors the first one but I
>>>> change
>>>> the value of a field. Then I call IndexWriter.updateDocument() which is
>>>> a
>>>> delete and an add.
>>>>
>>>> I then get a NRT reader with applyDeletes set to false and do a
>>>> MatchAllDocsQuery search. I would expect to get 2 documents back: the
>>>> current one and the updated one. But I only get back the updated one.
>>>>
>>>> But I know in real code with 1000's of documents flying into the index
>>>> that
>>>> I have gotten deleted documents returned.
>>>>
>>>> Can someone explain to me why my small test program doesn't get the
>>>> deleted
>>>> documents back?
>>>>
>>>> Stuart M Goldberg
>>>>
>>>> Senior Vice President of Software Develpment
>>>> *FIX Flyer LLC*
>>>> http://www.FIXFlyer.com/ <http://www.fixflyer.com/>
>>>>
>>>> NOTICE TO RECIPIENT: THIS E- MAIL IS MEANT ONLY FOR THE INTENDED
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>>>> DISTRIBUTION, OR DISSEMINATION IS STRICTLY PROHIBITED. ALL RIGHTS TO
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>>>> INFORMATION IS RESERVED BY FIX FLYER LLC. IF YOU ARE NOT THE INTENDED
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>>>>
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>>>> <https://www.fixflyer.com/disclaimer>
>>>>
>>>
>>>
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>
>
>

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