I have a usage pattern where I need to package up and store away all files
from an index referenced by multiple commit points. To that end, I
basically call IndexWriter.commit(), followed by
SnapshotDeletionPolicy.snapshot(), followed by something like this:
List<String> files = new ArrayList<String>(dir.listAll().length);
for (IndexCommit commit: snapshotter.getSnapshots()) {
files.addAll(commit.getFileNames());
}
As it turns out, this creates duplicates, specifically some .si files
appear to be present in multiple commit points. Is this expected, and if so
- does this mean that some commits are allowed to reuse segments created by
prior commits? I have always thought that each commit creates a new set of
segments... I'm using Lucene 4.6.
