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java.lang.NullPointerException: 	at by.softclub.abank.admin.ui.faces.UniqueSessionPhaseListener.beforePhase(UniqueSessionPhaseListener.java:26)	at com.sun.faces.lifecycle.Phase.handleBeforePhase(Phase.java:228)	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:99)	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:659)	at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86)	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:130)	at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:98)	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132)	at com.github.zhanhb.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:55)	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132)	at by.softclub.abank.admin.ui.faces.UrlFilter.doFilter(UrlFilter.java:118)	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132)	at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:85)	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)	at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)	at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)	at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)	at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)	at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)	at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58)	at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72)	at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)	at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76)	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)	at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)	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.handleFirstRequest(ServletInitialHandler.java:282)	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261)	at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80)	at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172)	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199)	at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)