[keycloak-user] keycloak and application configuration | how to resolve this error

[vandana thota]

ESC[0mESC[31m16:36:59,379 ERROR [io.undertow.request] (default task-1)
UT005023: Exception handling request to /sample/:
java.lang.NullPointerException
        at java.lang.String.contains(String.java:2133)
        at
org.keycloak.adapters.saml.elytron.KeycloakHttpServerAuthenticationMechanism.evaluateRequest(KeycloakHttpServerAuthenticationMechanism.java:82)
        at
org.wildfly.security.http.util.SetMechanismInformationMechanismFactory$1.evaluateRequest(SetMechanismInformationMechanismFactory.java:114)
        at
org.wildfly.security.http.util.SecurityIdentityServerMechanismFactory$1.evaluateRequest(SecurityIdentityServerMechanismFactory.java:77)
        at
org.wildfly.security.http.HttpAuthenticator$AuthenticationExchange.authenticate(HttpAuthenticator.java:115)
        at
org.wildfly.security.http.HttpAuthenticator$AuthenticationExchange.access$100(HttpAuthenticator.java:94)
        at
org.wildfly.security.http.HttpAuthenticator.authenticate(HttpAuthenticator.java:78)
        at
org.wildfly.elytron.web.undertow.server.SecurityContextImpl.authenticate(SecurityContextImpl.java:100)
        at
io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:55)
        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.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
        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
org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
        at
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at
io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
        at
io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
        at
io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
        at
io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
        at
io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
        at
io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)