Re: Lucene 10.5.1 bugfix release

I agree that the behavior has been with us for a long time but still I
think it is a bug that can be painful for big vector deployments. I would
like to consider it for the bugfix release as the change looks pretty safe.

On Wed, Aug 5, 2026 at 4:06 PM Michael Sokolov <[email protected]> wrote:

> is this really a candidate for a bugfix release? We've had this
> behavior ever since 9.0 -- seems more like an improvement that could
> wait for the next minor release. But, you know if the Ignacio wants to
> take it on, I wouldn't block it.
>
> On Wed, Aug 5, 2026 at 10:52 AM Eran Weiss <[email protected]> wrote:
> >
> > 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.
>
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