Liferay Shutdown Log Errors

04-Nov-2019 12:06:59.000 WARNING [main] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Framework Event Dispatcher: Equinox Container: e743df6a-d310-496b-9895-8268e33fb53f] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.lang.Object.wait(Native Method)
 java.lang.Object.wait(Object.java:502)
 org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.getNextEvent(EventManager.java:400)
 org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:336)
04-Nov-2019 12:06:59.001 WARNING [main] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Refresh Thread: Equinox Container: e743df6a-d310-496b-9895-8268e33fb53f] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.lang.Object.wait(Native Method)
 java.lang.Object.wait(Object.java:502)
 org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.getNextEvent(EventManager.java:400)
 org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:336)
04-Nov-2019 12:06:59.002 WARNING [main] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Framework stop] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1590)
 org.eclipse.osgi.container.SystemModule.stopWorker(SystemModule.java:270)
 org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule.stopWorker(EquinoxBundle.java:192)
 org.eclipse.osgi.container.Module.doStop(Module.java:636)
 org.eclipse.osgi.container.Module.stop(Module.java:498)
 org.eclipse.osgi.container.SystemModule.stop(SystemModule.java:202)
 org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule$1.run(EquinoxBundle.java:210)
 java.lang.Thread.run(Thread.java:748)
04-Nov-2019 12:06:59.003 SEVERE [main] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@4d7eb97a]) and a value of type [org.apache.felix.gogo.runtime.Pipe] (value [pipe<gosh --login --noshutdown> out=org.apache.felix.gogo.runtime.Pipe$MultiChannel@258633b8]) 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.
04-Nov-2019 12:06:59.004 SEVERE [main] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [org.apache.felix.gogo.runtime.threadio.ThreadIOImpl$1] (value [org.apache.felix.gogo.runtime.threadio.ThreadIOImpl$1@31358330]) and a value of type [java.util.LinkedList] (value [[org.apache.felix.gogo.runtime.threadio.Marker@36d41cdd]]) 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.