title: Springboot 2.6.0 / Spring fox 3 - Failed to start bean 'documentationPluginsBootstrapper'
body: <p>I'm trying to initiate a Springboot project using Open Jdk 15, Springboot 2.6.0, Springfox 3.
  We are working on a project that replaced Netty as the webserver and used Jetty instead because we do not need a non-blocking environment.</p>
  <p>In the code we depend primarily on Reactor API (Flux, Mono), so we can not remove <code>org.springframework.boot:spring-boot-starter-webflux</code> dependencies.</p>
  <p>I replicated the problem that we have in a new project.: <a href="https://github.com/jvacaq/spring-fox" rel="noreferrer">https://github.com/jvacaq/spring-fox</a>.</p>
  <p>I figured out that these lines in our build.gradle file are the origin of the problem.</p>
  <pre><code>compile(&quot;org.springframework.boot:spring-boot-starter-web&quot;) {
     exclude module: &quot;spring-boot-starter-tomcat&quot;
  }
  compile(&quot;org.springframework.boot:spring-boot-starter-jetty&quot;)
  </code></pre>
  <p>Here is the <code>build.gradle</code> file:</p>
  <pre><code>plugins {
      id 'org.springframework.boot' version '2.6.0'
      id 'io.spring.dependency-management' version '1.0.11.RELEASE'
      id 'java'
  }
  
  group = 'com.example'
  version = '0.0.1-SNAPSHOT'
  sourceCompatibility = '11'
  
  repositories {
      mavenCentral()
  }
  
  dependencies {
      compile(&quot;org.springframework.boot:spring-boot-starter-web&quot;) {
          exclude module: &quot;spring-boot-starter-tomcat&quot;
      }
      compile(&quot;org.springframework.boot:spring-boot-starter-jetty&quot;)
      implementation 'org.springframework.boot:spring-boot-starter-webflux'
      testImplementation 'org.springframework.boot:spring-boot-starter-test'
      testImplementation 'io.projectreactor:reactor-test'
      implementation &quot;io.springfox:springfox-boot-starter:3.0.0&quot;
  }
  
  test {
      useJUnitPlatform()
  }
  
  </code></pre>
  <p>I issued the command <code>gradle clean bootrun</code>. The result is this error:</p>
  <pre><code> gradle clean bootrun                                                                                                                                                                                                               
  
  &gt; Task :bootRun FAILED
  
    .   ____          _            __ _ _
   /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
  ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
   \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
    '  |____| .__|_| |_|_| |_\__, | / / / /
   =========|_|==============|___/=/_/_/_/
   :: Spring Boot ::                (v2.6.0)
  
  2021-11-19 09:41:06.665  INFO 16666 --- [           main] c.e.springfox.SpringFoxApplication       : Starting SpringFoxApplication using Java 15.0.2 on advance-Inspiron-5379 with PID 16666 (/home/advance/projects/spring-fox/build/classes/java/main started by advance in /home/advance/projects/spring-fox)
  2021-11-19 09:41:06.666  INFO 16666 --- [           main] c.e.springfox.SpringFoxApplication       : No active profile set, falling back to default profiles: default
  2021-11-19 09:41:07.294  INFO 16666 --- [           main] org.eclipse.jetty.util.log               : Logging initialized @1132ms to org.eclipse.jetty.util.log.Slf4jLog
  2021-11-19 09:41:07.396  INFO 16666 --- [           main] o.s.b.w.e.j.JettyServletWebServerFactory : Server initialized with port: 8080
  2021-11-19 09:41:07.398  INFO 16666 --- [           main] org.eclipse.jetty.server.Server          : jetty-9.4.44.v20210927; built: 2021-09-27T23:02:44.612Z; git: 8da83308eeca865e495e53ef315a249d63ba9332; jvm 15.0.2+7-27
  2021-11-19 09:41:07.417  INFO 16666 --- [           main] o.e.j.s.h.ContextHandler.application     : Initializing Spring embedded WebApplicationContext
  2021-11-19 09:41:07.417  INFO 16666 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 713 ms
  2021-11-19 09:41:07.474  INFO 16666 --- [           main] org.eclipse.jetty.server.session         : DefaultSessionIdManager workerName=node0
  2021-11-19 09:41:07.474  INFO 16666 --- [           main] org.eclipse.jetty.server.session         : No SessionScavenger set, using defaults
  2021-11-19 09:41:07.475  INFO 16666 --- [           main] org.eclipse.jetty.server.session         : node0 Scavenging every 660000ms
  2021-11-19 09:41:07.480  INFO 16666 --- [           main] o.e.jetty.server.handler.ContextHandler  : Started o.s.b.w.e.j.JettyEmbeddedWebAppContext@6aa3bfc{application,/,[file:///tmp/jetty-docbase.8080.2024342829220941812/, jar:file:/home/advance/.gradle/caches/modules-2/files-2.1/io.springfox/springfox-swagger-ui/3.0.0/1e665fbe22148f7c36fa8a08e515a0047cd4390b/springfox-swagger-ui-3.0.0.jar!/META-INF/resources],AVAILABLE}
  2021-11-19 09:41:07.480  INFO 16666 --- [           main] org.eclipse.jetty.server.Server          : Started @1318ms
  2021-11-19 09:41:07.920  INFO 16666 --- [           main] o.e.j.s.h.ContextHandler.application     : Initializing Spring DispatcherServlet 'dispatcherServlet'
  2021-11-19 09:41:07.920  INFO 16666 --- [           main] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
  2021-11-19 09:41:07.921  INFO 16666 --- [           main] o.s.web.servlet.DispatcherServlet        : Completed initialization in 1 ms
  2021-11-19 09:41:07.931  INFO 16666 --- [           main] o.e.jetty.server.AbstractConnector       : Started ServerConnector@2643d762{HTTP/1.1, (http/1.1)}{0.0.0.0:8080}
  2021-11-19 09:41:07.932  INFO 16666 --- [           main] o.s.b.web.embedded.jetty.JettyWebServer  : Jetty started on port(s) 8080 (http/1.1) with context path '/'
  2021-11-19 09:41:07.934  WARN 16666 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException: Cannot invoke &quot;org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()&quot; because &quot;this.condition&quot; is null
  2021-11-19 09:41:07.949  INFO 16666 --- [           main] o.e.jetty.server.AbstractConnector       : Stopped ServerConnector@2643d762{HTTP/1.1, (http/1.1)}{0.0.0.0:8080}
  2021-11-19 09:41:07.950  INFO 16666 --- [           main] org.eclipse.jetty.server.session         : node0 Stopped scavenging
  2021-11-19 09:41:07.951  INFO 16666 --- [           main] o.e.j.s.h.ContextHandler.application     : Destroying Spring FrameworkServlet 'dispatcherServlet'
  2021-11-19 09:41:07.951  INFO 16666 --- [           main] o.e.jetty.server.handler.ContextHandler  : Stopped o.s.b.w.e.j.JettyEmbeddedWebAppContext@6aa3bfc{application,/,[file:///tmp/jetty-docbase.8080.2024342829220941812/, jar:file:/home/advance/.gradle/caches/modules-2/files-2.1/io.springfox/springfox-swagger-ui/3.0.0/1e665fbe22148f7c36fa8a08e515a0047cd4390b/springfox-swagger-ui-3.0.0.jar!/META-INF/resources],STOPPED}
  2021-11-19 09:41:07.958  INFO 16666 --- [           main] ConditionEvaluationReportLoggingListener : 
  
  Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
  2021-11-19 09:41:07.970 ERROR 16666 --- [           main] o.s.boot.SpringApplication               : Application run failed
  
  org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException: Cannot invoke &quot;org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()&quot; because &quot;this.condition&quot; is null
          at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.13.jar:5.3.13]
          at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.13.jar:5.3.13]
          at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.13.jar:5.3.13]
          at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
          at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.13.jar:5.3.13]
          at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.13.jar:5.3.13]
          at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.13.jar:5.3.13]
          at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.13.jar:5.3.13]
          at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.0.jar:2.6.0]
          at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) ~[spring-boot-2.6.0.jar:2.6.0]
          at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) ~[spring-boot-2.6.0.jar:2.6.0]
          at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) ~[spring-boot-2.6.0.jar:2.6.0]
          at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.0.jar:2.6.0]
          at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) ~[spring-boot-2.6.0.jar:2.6.0]
          at com.example.springfox.SpringFoxApplication.main(SpringFoxApplication.java:10) ~[main/:na]
  Caused by: java.lang.NullPointerException: Cannot invoke &quot;org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()&quot; because &quot;this.condition&quot; is null
          at springfox.documentation.spring.web.WebMvcPatternsRequestConditionWrapper.getPatterns(WebMvcPatternsRequestConditionWrapper.java:56) ~[springfox-spring-webmvc-3.0.0.jar:3.0.0]
          at springfox.documentation.RequestHandler.sortedPaths(RequestHandler.java:113) ~[springfox-core-3.0.0.jar:3.0.0]
          at springfox.documentation.spi.service.contexts.Orderings.lambda$byPatternsCondition$3(Orderings.java:89) ~[springfox-spi-3.0.0.jar:3.0.0]
          at java.base/java.util.Comparator.lambda$comparing$77a9974f$1(Comparator.java:469) ~[na:na]
          at java.base/java.util.TimSort.countRunAndMakeAscending(TimSort.java:355) ~[na:na]
          at java.base/java.util.TimSort.sort(TimSort.java:220) ~[na:na]
          at java.base/java.util.Arrays.sort(Arrays.java:1306) ~[na:na]
          at java.base/java.util.ArrayList.sort(ArrayList.java:1721) ~[na:na]
          at java.base/java.util.stream.SortedOps$RefSortingSink.end(SortedOps.java:392) ~[na:na]
          at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:na]
          at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:na]
          at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:na]
          at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:na]
          at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485) ~[na:na]
          at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[na:na]
          at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) ~[na:na]
          at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na]
          at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) ~[na:na]
          at springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider.requestHandlers(WebMvcRequestHandlerProvider.java:81) ~[springfox-spring-webmvc-3.0.0.jar:3.0.0]
          at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) ~[na:na]
          at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) ~[na:na]
          at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[na:na]
          at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[na:na]
          at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) ~[na:na]
          at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na]
          at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) ~[na:na]
          at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.withDefaults(AbstractDocumentationPluginsBootstrapper.java:107) ~[springfox-spring-web-3.0.0.jar:3.0.0]
          at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.buildContext(AbstractDocumentationPluginsBootstrapper.java:91) ~[springfox-spring-web-3.0.0.jar:3.0.0]
          at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.bootstrapDocumentationPlugins(AbstractDocumentationPluginsBootstrapper.java:82) ~[springfox-spring-web-3.0.0.jar:3.0.0]
          at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:100) ~[springfox-spring-web-3.0.0.jar:3.0.0]
          at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.13.jar:5.3.13]
          ... 14 common frames omitted
  
  
  FAILURE: Build failed with an exception.
  
  * What went wrong:
  Execution failed for task ':bootRun'.
  &gt; Process 'command '/home/advance/.sdkman/candidates/java/15.0.2-open/bin/java'' finished with non-zero exit value 1
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
  
  * Get more help at https://help.gradle.org
  
  Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
  Use '--warning-mode all' to show the individual deprecation warnings.
  See https://docs.gradle.org/6.9.1/userguide/command_line_interface.html#sec:command_line_warnings
  
  BUILD FAILED in 2s
  5 actionable tasks: 5 executed
  </code></pre>
  <p>Does anyone have an idea how to solve it?</p>