Oauth2.0 integrated Springcloud Zuul solve critical bug error message: Principal must not being null

I'm not sure Oauth2.0 can view my previous posts.

Zuul for the Springcloud Micro-service framework can be used very simply can be verified online

This article only explains how to resolve conflicts between Oauth2.0 and Zuul packages.

Requirements: Create a new Oauth2.0 project the framework for gateway distribution is required on this basis Zuul

The problem is that once you import the required packages for Zuul

  
  <dependency>        <groupId>org.springframework.cloud</groupId>------"  Conflict       < Artifactid>spring-cloud-starter-zuul</artifactid>   </dependency>

<properties>
<project.build.sourceencoding>utf-8</project.build.sourceEncoding>
<project.reporting.outputencoding>utf-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>dalston.sr3</spring-cloud.version>
</properties>
<dependencymanagement> 
  <dependencies> 
  <dependency> 
  <groupId> Org.springframework.cloud</groupid> 
  < Artifactid>spring-cloud-dependencies</ARTIFACTID> 
  <version>${spring-cloud.version}</version 
  <type>pom</TYPE> 
  <scope>import</SCOPE> 
  </dependency> 
  </dependencies> 
 < /dependencymanagement>             

Request the distribution interface after running the error message

Java.lang.IllegalArgumentException:Principal must not beingNULLAt org.springframework.util.Assert.notNull (Assert.java:134) ~[spring-core-4.3.9.release.jar:4.3.9. RELEASE] at org.springframework.boot.actuate.audit.AuditEvent.<init> (auditevent.java:88) ~[spring-boot-actuator-1.5.4.release.jar:1.5.4. RELEASE] at org.springframework.boot.actuate.audit.AuditEvent.<init> (auditevent.java:64) ~[spring-boot-actuator-1.5.4.release.jar:1.5.4. RELEASE] at Org.springframework.boot.actuate.security.AuthenticationAuditListener.onAuthenticationSuccessEvent ( Authenticationauditlistener.java:(~[spring-boot-actuator-1.5.4.release.jar:1.5.4). RELEASE] at Org.springframework.boot.actuate.security.AuthenticationAuditListener.onApplicationEvent ( Authenticationauditlistener.java:~[spring-boot-actuator-1.5.4.release.jar:1.5.4). RELEASE] at Org.springframework.boot.actuate.security.AuthenticationAuditListener.onApplicationEvent ( Authenticationauditlistener.java:~[spring-boot-actuator-1.5.4.release.jar:1.5.4). RELEASE] at Org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener ( Simpleapplicationeventmulticaster.java:167) ~[spring-context-4.3.9.release.jar:4.3.9. RELEASE] at Org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent ( Simpleapplicationeventmulticaster.java:139) ~[spring-context-4.3.9.release.jar:4.3.9. RELEASE] at Org.springframework.context.support.AbstractApplicationContext.publishEvent ( Abstractapplicationcontext.java:393) ~[spring-context-4.3.9.release.jar:4.3.9. RELEASE] at Org.springframework.context.support.AbstractApplicationContext.publishEvent ( Abstractapplicationcontext.java:347) ~[spring-context-4.3.9.release.jar:4.3.9. RELEASE] At Org.springframework.security.authentication.DefaultAuthenticationEventPublisher.publishAuthenticationSuccess ( Defaultauthenticationeventpublisher.java:~[spring-security-core-4.2.3.release.jar:4.2.3). RELEASE] At Org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter.doFilter ( Oauth2authenticationprocessingfilter.java:156) ~[spring-security-oauth2-2.0.14. RELEASE.jar:na] at Org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter ( Filterchainproxy.java:331) ~[spring-security-web-4.2.3.release.jar:4.2.3. RELEASE] at Org.springframework.security.web.authentication.logout.LogoutFilter.doFilter (Logoutfilter.java:~[spring-security-web-4.2.3.release.jar:4.2.3). RELEASE] at Org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter (FilterChainProxy.java: 331) ~[spring-security-web-4.2.3.release.jar:4.2.3. RELEASE] at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal (Headerwriterfilter.java: ) ~[spring-security-web-4.2.3.release.jar:4.2.3. RELEASE] at Org.springframework.web.filter.OncePerRequestFilter.doFilter (Onceperrequestfilter.java:107) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter (FilterChainProxy.java: 331) ~[spring-security-web-4.2.3.release.jar:4.2.3. RELEASE] at Org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter ( Securitycontextpersistencefilter.java:(~[spring-security-web-4.2.3.release.jar:4.2.3). RELEASE] at Org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter (FilterChainProxy.java: 331) ~[spring-security-web-4.2.3.release.jar:4.2.3. RELEASE] At Org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal ( Webasyncmanagerintegrationfilter.java:~[spring-security-web-4.2.3.release.jar:4.2.3). RELEASE] at Org.springframework.web.filter.OncePerRequestFilter.doFilter (Onceperrequestfilter.java:107) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter (FilterChainProxy.java: 331) ~[spring-security-web-4.2.3.release.jar:4.2.3. RELEASE] at org.springframework.security.web.FilterChainProxy.doFilterInternal (Filterchainproxy.java:214) ~[spring-security-web-4.2.3.release.jar:4.2.3. RELEASE] at Org.springframework.security.web.FilterChainProxy.doFilter (Filterchainproxy.java:177) ~[spring-security-web-4.2.3.release.jar:4.2.3. RELEASE] at Org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate (Delegatingfilterproxy.java:346) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.springframework.web.filter.DelegatingFilterProxy.doFilter (Delegatingfilterproxy.java:262) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (Applicationfilterchain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.ApplicationFilterChain.doFilter (Applicationfilterchain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.RequestContextFilter.doFilterInternal (Requestcontextfilter.java:~[spring-web-4.3.9.release.jar:4.3.9). RELEASE] at Org.springframework.web.filter.OncePerRequestFilter.doFilter (Onceperrequestfilter.java:107) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (Applicationfilterchain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.ApplicationFilterChain.doFilter (Applicationfilterchain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal (Httpputformcontentfilter.java: (~[spring-web-4.3.9.release.jar:4.3.9). RELEASE] at Org.springframework.web.filter.OncePerRequestFilter.doFilter (Onceperrequestfilter.java:107) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (Applicationfilterchain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.ApplicationFilterChain.doFilter (Applicationfilterchain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal (Hiddenhttpmethodfilter.java: Bayi) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.springframework.web.filter.OncePerRequestFilter.doFilter (Onceperrequestfilter.java:107) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (Applicationfilterchain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.ApplicationFilterChain.doFilter (Applicationfilterchain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal (Characterencodingfilter.java: 197) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.springframework.web.filter.OncePerRequestFilter.doFilter (Onceperrequestfilter.java:107) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (Applicationfilterchain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.ApplicationFilterChain.doFilter (Applicationfilterchain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal (Metricsfilter.java:106) ~[spring-boot-actuator-1.5.4.release.jar:1.5.4. RELEASE] at Org.springframework.web.filter.OncePerRequestFilter.doFilter (Onceperrequestfilter.java:107) ~[spring-web-4.3.9.release.jar:4.3.9. RELEASE] at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (Applicationfilterchain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.ApplicationFilterChain.doFilter (Applicationfilterchain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.StandardWrapperValve.invoke (Standardwrappervalve.java:198) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.StandardContextValve.invoke (Standardcontextvalve.java:(+) [tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.authenticator.AuthenticatorBase.invoke (Authenticatorbase.java:478) [tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.StandardHostValve.invoke (Standardhostvalve.java:(+) [tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.valves.ErrorReportValve.invoke (Errorreportvalve.java:) [tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.core.StandardEngineValve.invoke (Standardenginevalve.java:) [tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.catalina.connector.CoyoteAdapter.service (Coyoteadapter.java:342) [tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.coyote.http11.Http11Processor.service (Http11processor.java:799) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.AbstractProcessorLight.process (Abstractprocessorlight.java:[tomcat-embed-core-8.5.15.jar:8.5.15]] at org.apache.coyote.abstractprotocol$connectionhandler.process (Abstractprotocol.java:861) [tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.tomcat.util.net.nioendpoint$socketprocessor.dorun (Nioendpoint.java:1455) [tomcat-embed-core-8.5.15.jar:8.5.15] at Org.apache.tomcat.util.net.SocketProcessorBase.run (Socketprocessorbase.java:) [tomcat-embed-core-8.5.15.jar:8.5.15] at Java.util.concurrent.ThreadPoolExecutor.runWorker (Threadpoolexecutor.java:1142) [na:1.8. 0_91] at Java.util.concurrent.threadpoolexecutor$worker.run (Threadpoolexecutor.java:617) [na:1.8. 0_91] at Org.apache.tomcat.util.threads.taskthread$wrappingrunnable.run (Taskthread.java:) [tomcat-embed-core-8.5.15.jar:8.5.15] at Java.lang.Thread.run (Thread.java:745) [na:1.8.0_91]

View Code

The reason is that a foreigner's blog has given the solution and the reason limited to English limited you can see for yourself 1. Address: https://github.com/spring-projects/spring-boot/issues/6447 2. Https://stackoverflow.com/questions/38958004/spring-boot-1-4-principal-must-not-be-null-exception

The translation is generally:

When you have spring Boot actuator and spring security at the same time,

trying to use SecurityContextHolder.getContext().getAuthentication() (or @AuthenticationPrincipal UriTemplate-based routing that is used in the method signature will get a null values.

That is, Oauth2.0 the imported package and Zuul the child package under the imported package Spring-boot-actuator (Note that the package is not reflected in the Zuul POM package) and that the call conflict will solve the problem of removing the package.

Workaround 1: Add the following exclusions tags to the zuul below to remove them.

<dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId> spring-cloud-starter-zuul</artifactid>            <exclusions>                <exclusion>                    <artifactid >spring-boot-actuator</artifactId>                    <groupId>org.springframework.boot</groupId>                </exclusion>            </exclusions>        </dependency>

The second solution is to start without knowing the spring-boot-actuator for Zuul, and how to find him I use the Springboot +maven Framework tool is idea

Click on the right sidebar maven projects--show dependence

You can see that spring-boot-actuator belongs to the sub-package under Springzuul, as shown below.

Find spring-boot-actuator Right-click Delete in the bottom right corner of the import

This is still true in pom after deletion

<dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId> spring-cloud-starter-zuul</artifactid>            <exclusions>                <exclusion>                    <artifactid >spring-boot-actuator</artifactId>                    <groupId>org.springframework.boot</groupId>                </exclusion>            </exclusions>        </dependency>

Oauth2.0 integrated Springcloud Zuul solve critical bug error message: Principal must not being null