Possible memory leak in net.sf.jasperreports.engine.xml.BaseSaxParserFactory

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Hi, I begin using Jasper Reports library recently.
I use version 6.11.0.
When I shutdown Tomcat(version 8.5.50), it add to log:
The web application [/Example1] created a ThreadLocal with key of type [java.lang.ThreadLocal] ... com.sun.org.apache.xerces.internal.util.xmlgrammarpoolimpl@c020514}]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
This is unwanted behavior because I sometimes redeploy application.
For inspect who load this class, I used Jprofiler and saw that class xmlgrammarpoolimpl is called by: 1. javax.xml.parsers.SAXParserFactory which called by net.sf.jasperreports.engine.xml.BaseSaxParserFactory by ... by net.sf.jasperreports.engine.JasperCompileManager
2. org.apache.catalina.loader.WebappClassLoaderBase which called by net.sf.jasperreports.engine.util.JRLoader by net.sf.jasperreports.engine.xml.BaseSaxParserFactory by .. by net.sf.jasperreports.engine.JasperCompileManager

Maybe you know how to avoid this problem, or maybe you can help solve this problem?

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INFO [Thread-11] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["http-nio-8080"]
INFO [Thread-11] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["ajp-nio-8009"]
INFO [Thread-11] org.apache.catalina.core.StandardService.stopInternal Stopping service [Catalina]
INFO [localhost-startStop-2] org.apache.catalina.core.ApplicationContext.log Destroying Spring FrameworkServlet 'dispatcher'
INFO [localhost-startStop-2] org.apache.catalina.core.ApplicationContext.log Closing Spring root WebApplicationContext
SEVERE [localhost-startStop-2] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@3d1bc241]) and a value of type [org.apache.commons.collections4.map.ReferenceMap] (value [{ParallelWebappClassLoader
context: ROOT
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@2e0fa5d3
=com.sun.org.apache.xerces.internal.util.XMLGrammarPoolImpl@399b0938}]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.

[reda-alaoui]

Introduced by 6e7e581 .