ConfigDataLocationResolvers.ConfigDataLocationResolvers(..., ResourceLoader resourceLoader) does not use a resourceLoader to load factory names

[Serzh0711]

org.springframework.boot.context.config.ConfigDataLocationResolvers.ConfigDataLocationResolvers(
    DeferredLogFactory logFactory, 
    ConfigurableBootstrapContext bootstrapContext, 
    Binder binder, 
    ResourceLoader resourceLoader) {
        this(
            logFactory, 
            bootstrapContext, 
            binder, 
            resourceLoader, 
            SpringFactoriesLoader.loadFactoryNames(
                ConfigDataLocationResolver.class, 
                (ClassLoader)null // !!! <= Here should be:  resourceLoader == null 
                                           // !!!                                     ? (ClassLoader)null 
                                           // !!!                                     :  resourceLoader.getClassLoader()
            )
        );
    }

Otherwise the following exception occurred here:

ConfigDataEnvironment.ConfigDataEnvironment(..., ConfigDataEnvironmentUpdateListener environmentUpdateListener) {
    ...
    this.resolvers = createConfigDataLocationResolvers(logFactory, bootstrapContext, binder, resourceLoader);
    ...
}

ConfigDataLocationResolvers::

	List<ConfigDataResolutionResult> resolve(ConfigDataLocationResolverContext context, ConfigDataLocation location,
			Profiles profiles) {
		if (location == null) {
			return Collections.emptyList();
		}
		for (ConfigDataLocationResolver<?> resolver : getResolvers()) {
			if (resolver.isResolvable(context, location)) {
				return resolve(resolver, context, location, profiles);
			}
		}
		throw new UnsupportedConfigDataLocationException(location); // !!! <= Here
	}

Stack trace:

	Caused by: org.springframework.boot.context.config.UnsupportedConfigDataLocationException: Unsupported config data location 'optional:classpath:/application-prod.properties'
	at org.springframework.boot.context.config.ConfigDataLocationResolvers.resolve(ConfigDataLocationResolvers.java:110)
	at org.springframework.boot.context.config.ConfigDataImporter.resolve(ConfigDataImporter.java:101)
	at org.springframework.boot.context.config.ConfigDataImporter.resolve(ConfigDataImporter.java:93)
	at org.springframework.boot.context.config.ConfigDataImporter.resolveAndLoad(ConfigDataImporter.java:81)
	at org.springframework.boot.context.config.ConfigDataEnvironmentContributors.withProcessedImports(ConfigDataEnvironmentContributors.java:121)
	at org.springframework.boot.context.config.ConfigDataEnvironment.processInitial(ConfigDataEnvironment.java:242)
	at org.springframework.boot.context.config.ConfigDataEnvironment.processAndApply(ConfigDataEnvironment.java:230)
	at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:97)
	at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:89)
	at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:100)
	at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:86)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:82)
	at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:63)
	at java.util.ArrayList.forEach(ArrayList.java:1257)
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:117)
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:111)
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:62)
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:362)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
	at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:123)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)

[wilkinsona]

Thanks for the report. This is a duplicate of #26149.