On Thu, Jul 12, 2012 at 3:09 AM, Sean Bridges <sean.brid...@gmail.com> wrote: > Is it possible to delete by docId in lucene 4? I can delete by docid > in lucene 3 using IndexReader.deleteDocument(int docId), but that > method is gone in lucene 4, and IndexWriter only allows deleting by > Term or Query.
that is correct. In lucene 4 IndexReader is really just a reader! > > This is our use case - In our system, each document is identified by > a unique serial id. If an error occurs, we may index the same message > multiple times. When an index grows large enough, we stop adding to > it, and optimize the index. During optimization, if we see multiple > docs with the same serialid, we delete all but the first, as all > documents with the same serialid are the same. I am wondering why you don't use the IW#updateDocument(Term,Doc) method? do you rely on multiple versions of the same doc? With Lucene 4 relying on the doc id can become very tricky. If you use multiple threads you create a lot of segments which can be merged in any order. You can't tell if a document ID maintains happened-before semantics at all. Can you tell us more about your usecase and why you are using deleteByDocID simon > > Thanks, > > Sean > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
