[jira] [Created] (SOLR-5780) Solr should benefit from Guava 16.0.1

["Guido Medina (JIRA)" <ji...@apache.org>]

Guido Medina created SOLR-5780:
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             Summary: Solr should benefit from Guava 16.0.1
                 Key: SOLR-5780
                 URL: https://issues.apache.org/jira/browse/SOLR-5780
             Project: Solr
          Issue Type: Improvement
          Components: SolrCloud
    Affects Versions: 4.7
         Environment: All.
            Reporter: Guido Medina
             Fix For: 4.8


Solr is using concurrentlinkedhashmap v1.2 and Guava 14.0.1 at the same time, according to concurrentlinkedhashmap author(s), that project is mainly objective is to introduce ideas and then when proven they are ported to Guava.

concurrentlinkedhashmap v1.2 was designed for Java 5 and v1.4 for Java 6+ which is the target version Solr 4.x requires, v1.4 had a great improvement in performance and memory impact compared to v1.2 which was ported to Guava (I strongly believe v16.0.1+ will do)

*Pertinent material:*

* [http://stackoverflow.com/questions/15299554/what-does-it-mean-that-concurrentlinkedhashmap-has-been-integrated-into-guava]
* [https://code.google.com/p/concurrentlinkedhashmap/wiki/Changelog]

All that said, concurrentlinkedhashmap should be eliminated and code using it should instead use MapMaker builder from Guava.



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