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https://issues.apache.org/jira/browse/JENA-1250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15611430#comment-15611430
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Osma Suominen commented on JENA-1250:
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Lucene 5 seems to bring a new index format:
https://lucene.apache.org/core/5_0_0/MIGRATE.html
Old indexes either have to be rebuilt or upgraded to the new format using the
IndexUpgrader tool, or a separate compatibility module
(lucene-backward-codecs.jar) installed.
I'm not sure whether it's worth supporting the old index format for jena-text,
as it's rather easy to reindex.
Lucene 6 brings some API changes:
http://lucene.apache.org/core/6_2_1/MIGRATE.html
I think it would be easiest to first attempt an upgrade to Lucene 5, and if
that goes well, then continue to version 6.
In my understanding, jena-text uses relatively few Lucene features in all so
most of the API changes are likely irrelevant. But I may be wrong.
It would be great if [~jmvanel] - or anyone - could try changing the dependency
in the POM just to see what happens. I don't have time for that right now but I
can help with sorting out the issues that arise if someone makes a PR.
> Upgrade text search to latest Lucene
> ------------------------------------
>
> Key: JENA-1250
> URL: https://issues.apache.org/jira/browse/JENA-1250
> Project: Apache Jena
> Issue Type: Improvement
> Components: Jena
> Reporter: Jean-Marc Vanel
>
> We are currently at Lucene 4.9.1 ,
> which is quite outdated compared to latest Lucene, which is 6.2.1 .
> Note that there is project to add a simple completion feature in addition to
> existing simple search.
> But it would be better to do that on an updated Lucene dependency .
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