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 >> RECIPIENT(S) OF THE TRANSMISSION, AND CONTAINS CONFIDENTIAL INFORMATION >> WHICH IS PROPRIETARY TO FIX FLYER LLC ANY UNAUTHORIZED USE, COPYING, >> DISTRIBUTION, OR DISSEMINATION IS STRICTLY PROHIBITED. ALL RIGHTS TO THIS >> INFORMATION IS RESERVED BY FIX FLYER LLC. IF YOU ARE NOT THE INTENDED >> RECIPIENT, PLEASE CONTACT THE SENDER BY REPLY EMAIL AND PLEASE DELETE THIS >> E-MAIL FROM YOUR SYSTEM AND DESTROY ANY COPIES. >> >> -- >> *Notice to Recipient*: https://www.fixflyer.com/disclaimer >> <https://www.fixflyer.com/disclaimer> >> > > -- *Notice to Recipient*: https://www.fixflyer.com/disclaimer <https://www.fixflyer.com/disclaimer>
