Cannot invoke "org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()" because "this.condition" is null

Question

I'm trying to run Springdoc with Spring Boot 2.6.7.

Configuration:

@Configuration
public class SwaggerConfiguration {
  
  @Bean
  public GroupedOpenApi publicApi() {
    return GroupedOpenApi.builder()
            .group("springshop-public")
            .pathsToMatch("/public/**")
            .build();
  }
}

Error stack:

00:50:54.956 [main] ERROR SpringApplication[reportFailure:830] - Application run failed
org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException: Cannot invoke "org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()" because "this.condition" is null
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181)
    at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54)
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356)
    at java.base/java.lang.Iterable.forEach(Iterable.java:75)
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155)
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123)
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
    at com.atlas.psp.AtlasRouterApplication.main(AtlasRouterApplication.java:53)
Caused by: java.lang.NullPointerException: Cannot invoke "org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()" because "this.condition" is null
    at springfox.documentation.spring.web.WebMvcPatternsRequestConditionWrapper.getPatterns(WebMvcPatternsRequestConditionWrapper.java:56)
    at springfox.documentation.RequestHandler.sortedPaths(RequestHandler.java:113)
    at springfox.documentation.spi.service.contexts.Orderings.lambda$byPatternsCondition$3(Orderings.java:89)
    at java.base/java.util.Comparator.lambda$comparing$77a9974f$1(Comparator.java:473)
    at java.base/java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)
    at java.base/java.util.TimSort.sort(TimSort.java:234)
    at java.base/java.util.Arrays.sort(Arrays.java:1307)
    at java.base/java.util.ArrayList.sort(ArrayList.java:1721)
    at java.base/java.util.stream.SortedOps$RefSortingSink.end(SortedOps.java:392)
    at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258)
    at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258)
    at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258)
    at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:510)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
    at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
    at springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider.requestHandlers(WebMvcRequestHandlerProvider.java:81)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
    at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
    at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
    at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.withDefaults(AbstractDocumentationPluginsBootstrapper.java:107)
    at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.buildContext(AbstractDocumentationPluginsBootstrapper.java:91)
    at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.bootstrapDocumentationPlugins(AbstractDocumentationPluginsBootstrapper.java:82)
    at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:100)
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178)
    ... 14 common frames omitted

Is there some way to fix this issue?

score 28 · Answer 1 · edited Jun 26 '23 at 07:43

This problem is caused by the new PathPatternParser introduced in Spring Boot 2.6. There are two ways to resolve:

As suggested by @gsan in the comment, add following in your application.yml or application.properties:

spring.mvc.pathmatch.matching-strategy=ant_path_matcher

OR

Add the following bean in your config class:

import org.springframework.boot.actuate.autoconfigure.endpoint.web.CorsEndpointProperties;
import org.springframework.boot.actuate.autoconfigure.endpoint.web.WebEndpointProperties;
import org.springframework.boot.actuate.autoconfigure.web.server.ManagementPortType;
import org.springframework.boot.actuate.endpoint.ExposableEndpoint;
import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
import org.springframework.boot.actuate.endpoint.web.ExposableWebEndpoint;
import org.springframework.boot.actuate.endpoint.web.WebEndpointsSupplier;
import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointsSupplier;
import org.springframework.boot.actuate.endpoint.web.annotation.ServletEndpointsSupplier;
import org.springframework.boot.actuate.endpoint.web.servlet.WebMvcEndpointHandlerMapping;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

@Bean
public WebMvcEndpointHandlerMapping webEndpointServletHandlerMapping(WebEndpointsSupplier webEndpointsSupplier,
        ServletEndpointsSupplier servletEndpointsSupplier, ControllerEndpointsSupplier controllerEndpointsSupplier,
        EndpointMediaTypes endpointMediaTypes, CorsEndpointProperties corsProperties,
        WebEndpointProperties webEndpointProperties, Environment environment) {
    List<ExposableEndpoint<?>> allEndpoints = new ArrayList();
    Collection<ExposableWebEndpoint> webEndpoints = webEndpointsSupplier.getEndpoints();
    allEndpoints.addAll(webEndpoints);
    allEndpoints.addAll(servletEndpointsSupplier.getEndpoints());
    allEndpoints.addAll(controllerEndpointsSupplier.getEndpoints());
    String basePath = webEndpointProperties.getBasePath();
    EndpointMapping endpointMapping = new EndpointMapping(basePath);
    boolean shouldRegisterLinksMapping = this.shouldRegisterLinksMapping(webEndpointProperties, environment,
            basePath);
    return new WebMvcEndpointHandlerMapping(endpointMapping, webEndpoints, endpointMediaTypes,
            corsProperties.toCorsConfiguration(), new EndpointLinksResolver(allEndpoints, basePath),
            shouldRegisterLinksMapping, null);
}

private boolean shouldRegisterLinksMapping(WebEndpointProperties webEndpointProperties, Environment environment,
        String basePath) {
    return webEndpointProperties.getDiscovery().isEnabled() && (StringUtils.hasText(basePath)
        || ManagementPortType.get(environment).equals(ManagementPortType.DIFFERENT));
}

Reference: Spring Boot 2.6 + Swagger startup exception: because "this.condition" is null

how about in spring mvc with xml file config bros? – Bui Hai Duong May 09 '23 at 09:23 — Bui Hai Duong, May 09 '23 at 09:23

score 10 · Answer 2 · answered Dec 20 '22 at 08:39

Well, the answer mentioned by @Lyncean Patel is not 100% correct because there is no OR in fixing this. From this github issue discussion thread, the way to fix it to do both:

set spring.mvc.pathmatch.matching-strategy: ant_path_matcher in application.properties
add this bean

@Bean
public WebMvcEndpointHandlerMapping webEndpointServletHandlerMapping(WebEndpointsSupplier webEndpointsSupplier, ServletEndpointsSupplier servletEndpointsSupplier, ControllerEndpointsSupplier controllerEndpointsSupplier, EndpointMediaTypes endpointMediaTypes, CorsEndpointProperties corsProperties, WebEndpointProperties webEndpointProperties, Environment environment) {
        List<ExposableEndpoint<?>> allEndpoints = new ArrayList();
        Collection<ExposableWebEndpoint> webEndpoints = webEndpointsSupplier.getEndpoints();
        allEndpoints.addAll(webEndpoints);
        allEndpoints.addAll(servletEndpointsSupplier.getEndpoints());
        allEndpoints.addAll(controllerEndpointsSupplier.getEndpoints());
        String basePath = webEndpointProperties.getBasePath();
        EndpointMapping endpointMapping = new EndpointMapping(basePath);
        boolean shouldRegisterLinksMapping = this.shouldRegisterLinksMapping(webEndpointProperties, environment, basePath);
        return new WebMvcEndpointHandlerMapping(endpointMapping, webEndpoints, endpointMediaTypes, corsProperties.toCorsConfiguration(), new EndpointLinksResolver(allEndpoints, basePath), shouldRegisterLinksMapping, null);
    }


private boolean shouldRegisterLinksMapping(WebEndpointProperties webEndpointProperties, Environment environment, String basePath) {
        return webEndpointProperties.getDiscovery().isEnabled() && (StringUtils.hasText(basePath) || ManagementPortType.get(environment).equals(ManagementPortType.DIFFERENT));
    }

Setting only a property didn't help, defining a bean - did – Frankie Drake Jul 13 '23 at 13:38 — Frankie Drake, Jul 13 '23 at 13:38

Max Sampaoli · Answer 3 · 2022-09-16T18:51:41.537

2

I had the same issue and it worked by adding configuration in application.yml AND creating the bean in my SwaggerConfig class.

Springboot 2.7.3
Java 17
springfox-boot-starter 3.0.0

When using springdoc-openapi-ui 1.6.11 you only need to add the application.yml configuration, as suggested by @Lyncean Patel.

edited Sep 16 '22 at 18:51

answered Sep 16 '22 at 18:44

Max Sampaoli

21
1
3

score 1 · Answer 4 · answered Dec 07 '22 at 10:06

I solved it. I used spring boot 2.6.12 and swagger3.0 This is the maven configuration：

 <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger-ui</artifactId>
        <version>3.0.0</version>
    </dependency>
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger2</artifactId>
        <version>3.0.0</version>
    </dependency>

then you should Override WebMvcRequestHandlerProvider.java (Copy and override constructors to filter out abnormal ones)

 this.handlerMappings = handlerMappings.stream().filter(mapping -> mapping.getPatternParser() == null)
            .collect(Collectors.toList());

Everything else stays the same You need to create a new package in your project home directory with the same name as the class ：springfox.documentation.spring.web.plugins

good luck！

score 0 · Answer 5 · answered May 13 '22 at 22:13

0

Consider migration to springdoc

Migration is such a smooth process and it is unlikely that you encounter bugs like that.

answered May 13 '22 at 22:13

gsan

549
1
4
14

2

But I already us it. – Peter Penzov May 13 '22 at 22:27
Sorry, I just assumed it was not springdoc since these kind of bugs usually occur on older versions of swagger. – gsan May 13 '22 at 22:38
could you try to set `spring.mvc.pathmatch.matching-strategy `property to `ant_path_matcher` on your `application.yml` or `application.properties` file – gsan May 13 '22 at 22:42

score 0 · Answer 6 · answered Oct 24 '22 at 21:16

I solved all these issues by removing all springfox dependencies and adding implementation 'org.springdoc:springdoc-openapi-ui:1.6.12'to my build.gradle file (if you use maven add the corresponding elements) then my SecurityFilterChain bean will look like

...
@Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        http.cors().and()
                .authorizeRequests().antMatchers("/actuator/**").permitAll()
                .and().authorizeRequests().antMatchers("/swagger-ui/**").permitAll()
                .and().authorizeRequests().antMatchers("/v3/api-docs/**").permitAll();
        return http.build();
}
...

No extra dependencies or configuration is required.

Abhinav Parnami · Answer 7 · 2023-01-10T13:20:04.923

0

I have used ->implementation("org.apache.commons:commons-lang3:3.12.0") this dependency in my kts file and there is no use of it for me, after removing this dependency this error got resolved . dependency : Apache Tomcat

edited Jan 10 '23 at 13:20

answered Jan 10 '23 at 13:19

Abhinav Parnami

1
1

As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Jan 10 '23 at 15:14

score 0 · Answer 8 · answered Apr 28 '23 at 10:11

adding below property worked for me as well.

spring.mvc.pathmatch.matching-strategy: ant_path_matcher

But it didn't work in another project where spring-actuator dependency was present, so if you're wondering why it's not working, perhaps it's due to actuator's presence. So, I had to drop swagger.

score 0 · Answer 9 · answered Aug 06 '23 at 10:40

0

I solved it with using spring parent "version 2.6.12" and swagger "3.0.0" version. these are maven configuration.

Note: this helped you when you will face "this.condition.isNull" error.

answered Aug 06 '23 at 10:40

Naveen Dwivedi

1

Cannot invoke "org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getPatterns()" because "this.condition" is null

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