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

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Details

Type: Improvement
Status: Closed
Priority: Minor
Resolution: Fixed
Affects Version/s: 7.1.1
Fix Version/s: 7.4
Component/s: None
Labels:
None

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