Hi, We incorporated *https://github.com/sematext/solr-researcher <https://github.com/sematext/solr-researcher>* into our project and it is responsible for memory leak / reference leak which is causing multiple *SolrIndexSearcher *objects in the heap dump.
37 instances of *"org.apache.solr.search.SolrIndexSearcher"*, loaded by *"org.eclipse.jetty.webapp.WebAppClassLoader @ 0x5e0020830"*occupy *744,482,384 (48.16%)* bytes. Biggest instances: - org.apache.solr.search.SolrIndexSearcher @ 0x5fcac64c0 - 108,168,104 (7.00%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x616b414b0 - 54,982,536 (3.56%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x60aaa5820 - 35,614,544 (2.30%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x5ed303418 - 26,742,472 (1.73%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x6c04d8948 - 26,413,728 (1.71%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x66d2f1ca8 - 26,230,600 (1.70%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x624904550 - 25,800,200 (1.67%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x6baa4c5f8 - 25,094,760 (1.62%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x676fefdd0 - 24,720,312 (1.60%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x6634d7a08 - 24,315,864 (1.57%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x652a82880 - 24,186,328 (1.56%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x6ad3ef080 - 24,078,800 (1.56%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x64bf747b0 - 24,073,736 (1.56%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x6a752cce0 - 23,937,584 (1.55%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x698fba4f8 - 23,339,000 (1.51%) bytes. - org.apache.solr.search.SolrIndexSearcher @ 0x6a12724c0 - 23,066,512 (1.49%) bytes. We would really appreciate if some can help us on how to pin-point: 1. *Reference leak* (since it is an independent third-party plugin). This is taking almost 80% of the total heap memory allocated (16GB). Looking forward to positive responses. Amrit Sarkar Search Engineer Lucidworks, Inc. 415-589-9269 www.lucidworks.com Twitter http://twitter.com/lucidworks LinkedIn: https://www.linkedin.com/in/sarkaramrit2 Medium: https://medium.com/@sarkaramrit2
