Hi all, I've opened a backport of #16368 to branch_10_5: https://github.com/apache/lucene/pull/16490 .
The fix makes HNSW graph construction check the merge abort flag before each node insertion, so IndexWriter#rollback and abortMerges no longer block until the entire graph is built. Without it, rollback on a large vector segment can block for tens of minutes. The fix has already been merged to main and branch_10x (#16391). Is it possible to include it in 10.5.1? Thanks, Eran.
