SpringBoot Config data location 'classpath:/' does not exist

I used the 2.4.2-SNAPSHOT version to get this error. I found that it was because there was no property file in the classpath:/ path. If the property file is placed in the classpath:/ path, it can start normally. It is normal for me to use the version before 2.4.1.

I use openjdk11.09 This is a demo to reproduce the problem

This is a demo to reproduce the problem demo.zip

The following is the log output when starting the program

 10:12:52.753 [main] DEBUG org.springframework.boot.diagnostics.LoggingFailureAnalysisReporter - Application failed to start due to an exception
org.springframework.boot.context.config.ConfigDataLocationNotFoundException: Config data location 'classpath:/' cannot be found
    at org.springframework.boot.context.config.ConfigDataEnvironment.checkMandatoryLocations(ConfigDataEnvironment.java:372)
    at org.springframework.boot.context.config.ConfigDataEnvironment.applyToEnvironment(ConfigDataEnvironment.java:323)
    at org.springframework.boot.context.config.ConfigDataEnvironment.processAndApply(ConfigDataEnvironment.java:235)
    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:172)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127)
    at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:82)
    at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:63)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
    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 com.example.demo.DemoApplication.main(DemoApplication.java:13)
10:12:52.757 [main] ERROR org.springframework.boot.diagnostics.LoggingFailureAnalysisReporter - 

***************************
APPLICATION FAILED TO START
***************************

Description:

Config data location 'classpath:/' does not exist

Action:

Check that the value 'classpath:/' is correct, or prefix it with 'optional:'


Process finished with exit code 1

Comment From: philwebb

This is the expected behavior with Spring Boot 2.4. See this section of the release notes.

You can change your main method to the following and things should work as before:

public static void main(String[] args) {
    new SpringApplicationBuilder(DemoApplication.class).properties(
        "spring.config.name:application",
        "spring.config.location:optional:classpath:/,optional:classpath:/config/properties/")
    .build().run(args);
}