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Posted to dev@lucene.apache.org by "Jeff Miller (JIRA)" <ji...@apache.org> on 2018/04/17 22:24:00 UTC

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

Jeff Miller created SOLR-12233:
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             Summary: QParserPlugin maintains a list of classes recreated every time a Solrcore object is created
                 Key: SOLR-12233
                 URL: https://issues.apache.org/jira/browse/SOLR-12233
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
    Affects Versions: 7.1.1
            Reporter: Jeff Miller


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



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