[jboss-jira] [JBoss JIRA] (DROOLS-5326) Make LambdaIntrospector.methodFingerprintsMap cache size configurable

Make LambdaIntrospector.methodFingerprintsMap cache size configurable --------------------------------------------------------------------- Key: DROOLS-5326 URL: https://issues.redhat.com/browse/DROOLS-5326 Project: Drools Issue Type: Task Components: executable model Affects Versions: 7.37.0.Final Reporter: Toshiya Kobayashi Assignee: Toshiya Kobayashi Priority: Major Labels: support Using the executable model, we can see a memory retention in LambdaIntrospector after reloading the kbase multiple times: {noformat} Class Name | Shallow Heap | Retained Heap ----------------------------------------------------------------------------------------------------------------------------------------------------- org.drools.modelcompiler.util.LambdaIntrospector$1 @ 0xc62e90a8 | 56 | 1,243,424 |- <class> class org.drools.modelcompiler.util.LambdaIntrospector$1 @ 0xc62c2158 | 0 | 0 |- head java.util.LinkedHashMap$Entry @ 0xc63577e0 | 40 | 52,080 |- table java.util.HashMap$Node[64] @ 0xd7283140 | 272 | 272 | |- <class> class java.util.HashMap$Node[] @ 0xc02d3af8 | 0 | 0 | |- [49] java.util.LinkedHashMap$Entry @ 0xc6336bf0 | 40 | 44,472 | |- [46] java.util.LinkedHashMap$Entry @ 0xc63577e0 | 40 | 52,080 | |- [30] java.util.LinkedHashMap$Entry @ 0xcb4305f0 | 40 | 39,760 | |- [35] java.util.LinkedHashMap$Entry @ 0xcb4415e0 | 40 | 23,320 | |- [12] java.util.LinkedHashMap$Entry @ 0xcb446c08 | 40 | 22,104 | |- [57] java.util.LinkedHashMap$Entry @ 0xcb44bd70 | 40 | 47,368 | |- [24] java.util.LinkedHashMap$Entry @ 0xcb457f28 | 40 | 52,672 | |- [63] java.util.LinkedHashMap$Entry @ 0xcb46a990 | 40 | 45,064 | |- [14] java.util.LinkedHashMap$Entry @ 0xce1ccaf8 | 40 | 47,368 | |- [45] java.util.LinkedHashMap$Entry @ 0xce1d8400 | 40 | 39,760 | |- [54] java.util.LinkedHashMap$Entry @ 0xce1e41c0 | 40 | 23,320 | | |- <class> class java.util.LinkedHashMap$Entry @ 0xc02c8090 System Class | 0 | 0 | | |- after java.util.LinkedHashMap$Entry @ 0xce1d8400 | 40 | 39,760 | | |- key org.drools.modelcompiler.util.LambdaIntrospector$ClassIdentifier @ 0xce1e41e8 | 24 | 280 | | | |- <class> class org.drools.modelcompiler.util.LambdaIntrospector$ClassIdentifier @ 0xc62e01c0 | 0 | 0 | | | |- classLoader org.drools.dynamic.DynamicProjectClassLoader$DefaultInternalTypesClassLoader @ 0xcb643360 | 64 | 581,176 | | | | |- <class> class org.drools.dynamic.DynamicProjectClassLoader$DefaultInternalTypesClassLoader @ 0xc24d3320| 8 | 32 | | | | |- projectClassLoader org.drools.dynamic.DynamicProjectClassLoader @ 0xcb5ed8b8 | 88 | 45,501,888 ----------------------------------------------------------------------------------------------------------------------------------------------------- {noformat} LambdaIntrospector$1 extends LinkedHashMap and its cache size is 32. https://github.com/kiegroup/drools/blob/master/drools-model/drools-model-... The intent of this JIRA is to provide a flag to make this cache size configurable.