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https://issues.apache.org/jira/browse/SOLR-9079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15274569#comment-15274569
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Alan Woodward commented on SOLR-9079:
-------------------------------------
I'd actually go the other way, and try and remove commons-lang entirely. Guava
too, and commons-configuration if we can. We're on Java 8 now, lots of the
things that these libraries were introduced to fix are part of the core
language. And the few methods that we do need, we can fork and include in a
Utils package. Importing jars for the sake of a couple of classes just bloats
the distribution and leads to dependency hell.
> Upgrade commons-lang to version 3.x
> -----------------------------------
>
> Key: SOLR-9079
> URL: https://issues.apache.org/jira/browse/SOLR-9079
> Project: Solr
> Issue Type: Wish
> Reporter: Christine Poerschke
> Priority: Minor
>
> Current version used is [/commons-lang/commons-lang =
> 2.6|https://github.com/apache/lucene-solr/blob/master/lucene/ivy-versions.properties#L68]
> and a key motivation would be to have
> [commons.lang3|http://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/package-summary.html]
> APIs available e.g.
> [org.apache.commons.lang3.tuple.Pair|http://commons.apache.org/proper/commons-lang/apidocs/index.html?org/apache/commons/lang3/tuple/Pair.html]
> as an alternative to
> [org.apache.solr.common.util.Pair|https://github.com/apache/lucene-solr/blob/master/solr/solrj/src/java/org/apache/solr/common/util/Pair.java]
> variant.
> [This|http://mail-archives.apache.org/mod_mbox/lucene-dev/201605.mbox/%3cc6c4e67c-9506-cb1f-1ca5-cfa6fc880...@elyograg.org%3e]
> dev list posting reports on exploring use of 3.4 instead of 2.6 and
> concludes with the discovery of an optional zookeeper dependency on
> commons-lang-2.4 version.
> So upgrading commons-lang can't happen anytime soon but this ticket here to
> track motivations and findings so far for future reference.
> selected links into other relevant dev list threads:
> *
> http://mail-archives.apache.org/mod_mbox/lucene-dev/201605.mbox/%3CA9C1B04B-EA67-4F2F-A9F3-B24A2AFB8598%40gmail.com%3E
> *
> http://mail-archives.apache.org/mod_mbox/lucene-dev/201605.mbox/%3CCAN4YXvdSrZXDJk7VwuVzxDeqdocagS33Fx%2BstYD3yTx5--WXiA%40mail.gmail.com%3E
> *
> http://mail-archives.apache.org/mod_mbox/lucene-dev/201605.mbox/%3CCAN4YXvdWmCDSzXV40-wz1sr766GSwONGFem7UutkdXnsy0%2BXrg%40mail.gmail.com%3E
> *
> http://mail-archives.apache.org/mod_mbox/lucene-dev/201605.mbox/%3cc6c4e67c-9506-cb1f-1ca5-cfa6fc880...@elyograg.org%3e
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