On Aug 11, 2009, at 4:28 AM, Michael Busch wrote:
I'm not just responding to just you there, but more to the growing
pack of those speaking against the new API. I don't see specific
issues being brought up - the only issues I have seen brought up
have been addressed in JIRA issues that have received no comments
indicating the fix was not good enough. So we are seeing a lot of
general complaints, but specific complaints have been addressed as
far as I can tell.
Thanks Mark. Yeah, I'm really not sure what actually the problem
here is now. There was a performance test in Solr that apparently
ran much slower after upgrading to the new Lucene jar. This test is
testing a rather uncommon scenario: very very short documents.
That is not an uncommon scenario. Solr has very, very short fields
_ALL THE TIME_.
Within one day - thanks to Uwe - we committed a patch that basically
brings back the performance to where it was before. That is a pretty
good turnaround time. And according to Robert's and Mark's
performance tests Lucene trunk is now even a little bit faster than
2.4 was. This was not the first time we found and fixed a bug in
Lucene and it won't be the last.
Of course.
As far as back compat - is it really still considered an issue? We
have broken back compat in this release wherever it was convenient
to do so. I suspect that will continue. I just wish our policy
reflected how things actually work (and I think they work as they
should, based on the circumstances that lead to each decision).
All backwards-compatibility problems we could think of were
addressed and all possible uses cases were tested regarding
backwards-compatibility. In LUCENE-1693 you can find the many
iterations Uwe and I had about this. All current unit tests pass.
All contrib tests pass. All backwards-compatibility tests from the
2.4 tag pass as well. This is probably one of the best-tested
additions to Lucene in terms of backwards-compatibility we've had in
a while.
But AFAICT, it seems like the only choice one really has is to upgrade
their code, which can be a lot of work.
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