Resources in /META-INF/ of executable-fat-jar would be fetched repeatedly.

[QilongZhang]

When execute a Spring Boot Fat Jar，it's bootstrapped in AppClassLoader, actually switch to LaunchedURLClassLoader during refreshing application context.

As the parent of LaunchedURLClassLoader is AppClassLoader, it will lead resource in /META-INF/* of executable-fat-jar to be loaded repeatedly when invoke LaunchedURLClassLoader.getResources:

    public Enumeration<URL> getResources(String name) throws IOException {
        Objects.requireNonNull(name);
        @SuppressWarnings("unchecked")
        Enumeration<URL>[] tmp = (Enumeration<URL>[]) new Enumeration<?>[2];
        if (parent != null) {
            tmp[0] = parent.getResources(name);
        } else {
            tmp[0] = BootLoader.findResources(name);
        }
        tmp[1] = findResources(name);

        return new CompoundEnumeration<>(tmp);
    }

it leads our program failed to run！would you fix it?

[philwebb]

I'm sorry but I can't understand the issue as it's reported. Could you please provide a sample application that shows the failure.

[QilongZhang]

Thanks a lot. I found this bug has been fixed in 1.4.x.

#7449
#7595

[philwebb]

@QilongZhang 1.4.x is no longer supported, you should upgrade to 2.1.x