Hi All, I got below issue while i running my application on wildfly-10.1.0.Final,

Context Path:/MyMDAPI

Servlet Path:/swagger-ui.html

Path Info:null

Query String:null

Stack Trace

java.lang.NullPointerException: value is null

org.jboss.logmanager.MDC.putObject(MDC.java:78)

org.jboss.logmanager.MDC.put(MDC.java:62)

org.slf4j.impl.Slf4jMDCAdapter.put(Slf4jMDCAdapter.java:32)

org.slf4j.MDC.put(MDC.java:116)

ch.qos.logback.classic.helpers.MDCInsertingServletFilter.insertIntoMDC(MDCInsertingServletFilter.java:70)

ch.qos.logback.classic.helpers.MDCInsertingServletFilter.doFilter(MDCInsertingServletFilter.java:49)

io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)

io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)

com.Myone.common.filter.CORSFilter.doFilter(CORSFilter.java:39)

io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)

io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)

io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)

io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)

io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)

org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)

io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)

io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)

io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)

io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)

io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)

io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)

io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)

io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)

io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)

io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)

io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)

io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)

io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)

io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)

io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)

io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)

io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)

io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)

io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)

io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)

io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)

io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)

io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)

io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)

io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:805)

java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

java.lang.Thread.run(Thread.java:745)

I could not figure it out why i got this issue. By searching on net i found that it is due to sl4f and Jboss logging method issue, sl4j map method return null but  logmanager doesn't.