MP REST client causes classloader leak on undeploy -------------------------------------------------- Key: WFLY-13595 URL: https://issues.redhat.com/browse/WFLY-13595 Project: WildFly Issue Type: Bug Components: MP REST Client Affects Versions: 20.0.0.Final Reporter: Richard DiCroce Assignee: Alessio Soldano Priority: Major Fix For: 23.0.0.Beta1 I have an application that uses CDI and JAX-RS but not MP REST. The MP subsystems aren't even part of the WildFly configuration. Nonetheless, the MP REST client is added to the deployment and creates a classloader leak when the application is undeployed. See below for the paths to GC root, as determined using a heap dump analyzed by Eclipse MAT. In particular, note that org.jboss.resteasy.microprofile.client.RestClientExtension keeps a static reference to the CDI BeanManager. Workaround: add an exclusion in jboss-deployment-structure.xml to prevent the org.jboss.resteasy.resteasy-client-microprofile module from being added to the deployment. {noformat} Class Name | Shallow Heap | Retained Heap ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | com.sg.sciq.jpa.entity.QStore @ 0xfc8913f0 | 120 | 10,704 '- store class com.sg.sciq.jpa.entity.QStore @ 0xe53d5af0 | 24 | 10,816 '- [459] java.lang.Object[5120] @ 0xe702af00 | 20,496 | 3,166,624 '- elementData java.util.Vector @ 0xe4677e88 | 32 | 3,166,656 '- classes org.jboss.modules.ModuleClassLoader @ 0xe4677208 | 88 | 3,654,184 '- moduleClassLoader org.jboss.as.weld.discovery.WeldClassFileServices @ 0xe4d09bb8 | 24 | 24 '- value java.util.HashMap$Node @ 0xe507ed10 | 32 | 32 '- [63] java.util.HashMap$Node[128] @ 0xe4df06e8 | 528 | 2,904 '- table java.util.HashMap @ 0xe4df06b8 | 48 | 2,984 '- services org.jboss.weld.bootstrap.api.helpers.SimpleServiceRegistry @ 0xe4df06a8 | 16 | 3,000 '- services org.jboss.weld.manager.BeanManagerImpl @ 0xe4df0610 | 152 | 7,848 '- manager org.jboss.weld.bean.builtin.BeanManagerProxy @ 0xe4df0c90 | 24 | 24 '- manager class org.jboss.resteasy.microprofile.client.RestClientExtension @ 0xe4df0c20 | 8 | 56 '- [0] java.lang.Object[10] @ 0xe46ec028 | 56 | 80 '- elementData java.util.Vector @ 0xe46ec008 | 32 | 112 '- classes org.jboss.modules.ModuleClassLoader @ 0xe46ebea8 | 88 | 3,240 '- moduleClassLoader org.jboss.modules.Module @ 0xe47d1348 | 56 | 30,296 '- module org.jboss.modules.ModuleLoader$FutureModule @ 0xe4a65790 | 24 | 24 '- val java.util.concurrent.ConcurrentHashMap$Node @ 0xe4a65770 | 32 | 56 '- [352] java.util.concurrent.ConcurrentHashMap$Node[512] @ 0xe08491f0 | 2,064 | 19,088 '- table java.util.concurrent.ConcurrentHashMap @ 0xe0487188 | 64 | 19,152 '- moduleMap org.jboss.modules.LocalModuleLoader @ 0xe0487150 | 56 | 22,120 |- moduleLoader org.jboss.modules.Module @ 0xe014b580 | 56 | 9,336 |- moduleLoader org.jboss.modules.Module @ 0xe017c0e0 | 56 | 58,440 |- moduleLoader org.jboss.modules.Module @ 0xe034f7c8 | 56 | 28,576 |- moduleLoader org.jboss.modules.Module @ 0xe05f8e50 | 56 | 41,160 |- moduleLoader org.jboss.modules.Module @ 0xe06db838 | 56 | 72,288 |- moduleLoader org.jboss.modules.Module @ 0xe06f42e0 | 56 | 20,720 |- moduleLoader org.jboss.modules.Module @ 0xe0741d58 | 56 | 56,712 |- moduleLoader org.jboss.modules.Module @ 0xe0979ec8 | 56 | 43,760 |- moduleLoader org.jboss.modules.Module @ 0xe04a9200 | 56 | 14,000 |- moduleLoader org.jboss.modules.Module @ 0xe05c9b30 | 56 | 8,704 |- moduleLoader org.jboss.modules.Module @ 0xe0729200 | 56 | 23,264 |- moduleLoader org.jboss.modules.Module @ 0xe0941378 | 56 | 54,360 |- moduleLoader org.jboss.modules.Module @ 0xe032e128 | 56 | 22,832 |- moduleLoader org.jboss.modules.Module @ 0xe05dbaf0 | 56 | 27,728 |- INSTANCE class org.jboss.modules.DefaultBootModuleLoaderHolder @ 0xe065cbe0| 8 | 8 |- moduleLoader org.jboss.modules.Module @ 0xe068b460 | 56 | 20,008 |- moduleLoader org.jboss.modules.Module @ 0xe0707518 | 56 | 46,848 |- moduleLoader org.jboss.modules.Module @ 0xe073b5e0 | 56 | 44,880 |- moduleLoader org.jboss.modules.Module @ 0xe0213738 | 56 | 12,040 |- moduleLoader org.jboss.modules.Module @ 0xe058c4f0 | 56 | 23,424 |- moduleLoader org.jboss.modules.Module @ 0xe02f41c8 | 56 | 30,144 |- moduleLoader org.jboss.modules.Module @ 0xe034f128 | 56 | 27,088 |- moduleLoader org.jboss.modules.Module @ 0xe0500470 | 56 | 9,912 |- moduleLoader org.jboss.modules.Module @ 0xe12ceea0 | 56 | 24,648 '- Total: 24 entries | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- {noformat}