Is it possible to iterate through documents stored in Lucene Index?

Question

I have some documents stored in a Lucene index with a docId field. I want to get all docIds stored in the index. There is also a problem. Number of documents is about 300 00

Answer 1

Lucene 4

Bits liveDocs = MultiFields.getLiveDocs(reader);
for (int i=0; i

See LUCENE-2600 on this page for details: https://lucene.apache.org/core/4_0_0/MIGRATE.html