[Yanel-dev] Upgrading Lucene

[Michael Wechner]

Hi Balz

Thanks very much for your feedback!

I just found an alternative Elasticsearch client, which has no Lucene
dependencies

https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/_initialization.html

but I think we should upgrade Lucene anyway and your suggestions below
make a lot of sense!

Thanks very much

Michael

Am 15.08.17 um 17:02 schrieb basZero:
> Hurray!!!
> I proposed the same thing in 2013:
> https://github.com/wyona/yarep/issues/6
>
> It would be great to see Lucene 6 in yanel.
>
> Regarding source code repository of yanel/yarep etc., here my thought:
> - I would create a new branch "lucene2.9.2" in all repositories of the
> current latest status. This way, people who want to work with this
> latest version and lucene 2.9.2 can still get the code very easily.
> - The master branch would then be upgraded to use Lucene 6.
>
> Some other remarks:
> - Lucene 6 runs on Java 1.8 or later. So make sure all old
> dependencies are upgraded as well! (in all repositories like yarep,
> security etc.)
> - The index of 2.9.2 won't be compatible, Lucene only guarantees
> compatibility within the same major release (e.g. 6.0.0 and 6.6.0 will
> have the same index format).
>
> The upgrade must be done carefully, because I currently don't see what
> libraries Lucene is depending on (e.g. Log4j, apache commons
> stuff...), I assume that many libs currently in yanel (which are out
> of date) will have to be upgraded as well. Example: yanel uses log4j
> 2.0 beta8 ... Lucene 6 will most probably not use a beta version :-)
> so an upgrade to log4j 2.5 is most probably required.
>
>
>
> Cheers, Balz
>
> On Tue, Aug 15, 2017 at 4:45 PM, Michael Wechner
> <michael.wechner at wyona.com <mailto:michael.wechner at wyona.com>> wrote:
>
>     Hi Together
>
>     I have recently tried to integrate Elasticsearch into Yanel, but have
>     trouble doing this, because Elasticsearch requires a more recent
>     Lucene
>     version than Yarep is using (2.9.2).
>
>
>     Lucene already offers version 6.6.0
>     (https://lucene.apache.org/core/downloads.html
>     <https://lucene.apache.org/core/downloads.html>) and I think it
>     would be
>     good to upgrade Lucene finally. I am not sure whether search
>     indices are
>     still compatible, but one could re-generate a search index.
>
>     What do you think? Any objections?
>
>     Thanks
>
>     Michael
>
>
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>
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