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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