SpringBoot Spring Boot 2.3.1 upgrade issue

Hi Team, I was trying to upgrade my application to spring boot 2.3.1, got issue -java.lang.UnsupportedOperationException: null at java.util.Collections$UnmodifiableMap.put(Collections.java:1459) in my postprocessenvironment class. please give me some insight.

Comment From: bclozel

Could you provide us with a sample application that reproduces the issue? Your comment doesn't give us enough information to look into this.

Thanks!

Comment From: spring-projects-issues

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

Comment From: bismaya123

Hi Team, i have resolved the issue, Thanks @bclozel for your prompt response.it was having some properties file issue, so I did resolve on that day. @spring-issuemaster please go ahead and close the issue.

Comment From: caiqichang

@bismaya123 could you tell how to deal with it ? i got this problem too

Comment From: bismaya123

Hi @caiqichang, you get this type of error, when you try to write something to a read only properties file during deployment. if you are using build-info properties to read service-name and service-version etc. through a config class, avoid doing that so, try to read all those information from application properties directly rather than modifying properties file. hope this will resolve this problem.

Comment From: caiqichang

@bismaya123 thank you. i found i should override the properties instead of modifying them. some code like:

public class EnvironmentPostProcessorConfig implements EnvironmentPostProcessor {
    @Override
    public void postProcessEnvironment(ConfigurableEnvironment environment, SpringApplication application) {
        // ...
        environment.getPropertySources().addFirst(new MapPropertySource(...));
    }
}