[SOLR-12233] QParserPlugin maintains a list of classes recreated every time a Solrcore object is created

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 7.1.1
• Fix Version/s: 7.4
• Assignee: David Smiley
• Reporter: Jeff Miller
• Created: 17/Apr/18 22:23
• Updated: 08/Jun/19 15:10
• Resolved: 05/Jun/18 19:15

Description

QParserPlugin maintains a static map of Class Names to Class objects and everytime we create a SolrCore object this causes a lot of overhead doing classloader lookups.  Our system runs a lot of cores and the classloader gets bogged down when a lot of threads are creating solrcore objects.  

There's no need to create these objects every time, similar classes such as 

TransformerFactory store the object one time and reference it over and over again

Issue Links

• links to: GitHub Pull Request #355
• links to: GitHub Pull Request #355