Found one Java-level deadlock:
=============================
"default task-1":
  waiting to lock monitor 0x000055af2a5fc268 (object 0x00000000ea9633b0, a io.undertow.servlet.core.ManagedFilter),
  which is held by "ServerService Thread Pool -- 37"
"ServerService Thread Pool -- 37":
  waiting for ownable synchronizer 0x00000000eda4bbc0, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
  which is held by "default task-1"

Java stack information for the threads listed above:
===================================================
"default task-1":
	at io.undertow.servlet.core.ManagedFilter.start(ManagedFilter.java:87)
	- waiting to lock <0x00000000ea9633b0> (a io.undertow.servlet.core.ManagedFilter)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:59)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
	at io.undertow.servlet.handlers.ServletChain.handleRequest(ServletChain.java:68)
	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:257)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchToPath(ServletInitialHandler.java:182)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImpl(RequestDispatcherImpl.java:225)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImplSetup(RequestDispatcherImpl.java:147)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:110)
	at javaeetutorial.mood.TimeOfDayFilter.doFilter(TimeOfDayFilter.java:53)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
	at io.undertow.servlet.handlers.ServletChain.handleRequest(ServletChain.java:68)
	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:257)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchToPath(ServletInitialHandler.java:182)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImpl(RequestDispatcherImpl.java:225)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImplSetup(RequestDispatcherImpl.java:147)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:110)
	at javaeetutorial.mood.TimeOfDayFilter.doFilter(TimeOfDayFilter.java:53)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
	at io.undertow.servlet.handlers.ServletChain.handleRequest(ServletChain.java:68)
	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:257)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchToPath(ServletInitialHandler.java:182)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImpl(RequestDispatcherImpl.java:225)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImplSetup(RequestDispatcherImpl.java:147)
	at io.undertow.servlet.spec.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:110)
	at javaeetutorial.mood.TimeOfDayFilter.doFilter(TimeOfDayFilter.java:53)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
	...
"ServerService Thread Pool -- 37":
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000000eda4bbc0> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)
	at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:943)
	at javaeetutorial.mood.TimeOfDayFilter.destroy(TimeOfDayFilter.java:106)
	at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:109)
	at org.wildfly.extension.undertow.security.RunAsLifecycleInterceptor.destroy(RunAsLifecycleInterceptor.java:94)
	at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:95)
	at io.undertow.servlet.core.ManagedFilter.stop(ManagedFilter.java:97)
	- locked <0x00000000ea9633b0> (a io.undertow.servlet.core.ManagedFilter)
	at io.undertow.servlet.core.DeploymentManagerImpl.call(DeploymentManagerImpl.java:617)
	at io.undertow.servlet.core.DeploymentManagerImpl.call(DeploymentManagerImpl.java:612)
	at io.undertow.servlet.core.ServletRequestContextThreadSetupAction.call(ServletRequestContextThreadSetupAction.java:42)
	at io.undertow.servlet.core.ContextClassLoaderSetupAction.call(ContextClassLoaderSetupAction.java:43)
	at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create(SecurityContextThreadSetupAction.java:105)
	at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction$$Lambda/1935933046.call(Unknown Source)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create(UndertowDeploymentInfoService.java:1551)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda/1897544253.call(Unknown Source)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create(UndertowDeploymentInfoService.java:1551)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda/1897544253.call(Unknown Source)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create(UndertowDeploymentInfoService.java:1551)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda/1897544253.call(Unknown Source)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create(UndertowDeploymentInfoService.java:1551)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda/1897544253.call(Unknown Source)
	at io.undertow.servlet.core.DeploymentManagerImpl.stop(DeploymentManagerImpl.java:626)
	at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.stopContext(UndertowDeploymentService.java:135)