Grzegorz Grzybek created KARAF-4686:
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Summary: ClassLoader leak with RmiRegistryFactory and
sun.rmi.transport.tcp.TCPEndpoint
Key: KARAF-4686
URL: https://issues.apache.org/jira/browse/KARAF-4686
Project: Karaf
Issue Type: Bug
Reporter: Grzegorz Grzybek
Here's a leak I found in JVisualVM.
{noformat}
this - value: org.apache.felix.framework.BundleWiringImpl #3
<- m_wiring - class:
org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5, value:
org.apache.felix.framework.BundleWiringImpl #3
<- <classLoader> - class:
org.apache.karaf.management.RmiRegistryFactory$KarafServerSocketFactory, value:
org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5 #3
<- <class> - class:
org.apache.karaf.management.RmiRegistryFactory$KarafServerSocketFactory, value:
org.apache.karaf.management.RmiRegistryFactory$KarafServerSocketFactory class
RmiRegistryFactory$KarafServerSocketFactory
<- ssf - class: sun.rmi.transport.tcp.TCPEndpoint, value:
org.apache.karaf.management.RmiRegistryFactory$KarafServerSocketFactory #1
<- key - class: java.util.HashMap$Entry, value:
sun.rmi.transport.tcp.TCPEndpoint #9
<- next - class: java.util.HashMap$Entry, value:
java.util.HashMap$Entry #19809
<- [0] - class: java.util.HashMap$Entry[], value:
java.util.HashMap$Entry #28136
<- table - class: java.util.HashMap, value:
java.util.HashMap$Entry[] #4031
<- localEndpoints (sticky class) - class:
sun.rmi.transport.tcp.TCPEndpoint, value: java.util.HashMap #4065
{noformat}
sun.rmi.transport.tcp.TCPEndpoint has non-weak map that keeps references to
socket factories:
http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/48c99b423839/src/share/classes/sun/rmi/transport/tcp/TCPEndpoint.java#l148
This prevents cleaning up classloader of {{org.apache.karaf.management.server}}
bundle.
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