I am encountering the following issue:
When using Java 8 + Spring, I have the following code:

@SpringBootApplication
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class, args);
        SecurityUtilsBase.extractNativeLibraries("/usr/lib");
    }
}

and

@PostMapping("/decrypt")
public String decrypt(@RequestParam String value) {
    try {
        TestCrypt crypt = new TestCrypt(); 
        return crypt.cypher_Damo_Decrypt_B64(value);
    } catch (Exception e) {
        e.printStackTrace();
        return "";
    }
}

The library loading in TestCrypt:

static {
    try {
        System.out.println("Before System.loadLibrary..");
        System.loadLibrary("testcryptjni");
    } catch (UnsatisfiedLinkError var1) {
        System.out.println("libmascryptjni.so load error " + var1);
    }
}

In this case, the controller doesn’t work at all, and the program stops immediately without any error message.

Stop app image

When I modify the main method and call it once before, like this:

@SpringBootApplication
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class, args);
        SecurityUtilsBase.extractNativeLibraries("/usr/lib");
        TestCrypt crypt = new TestCrypt();
        System.out.println(crypt.cypher_Damo_Decrypt_B64("0hKybskMef8voU8QHxQhww=="));
    }
}

The controller then works normally. I suspect this is related to Java’s resource cleanup mechanism.

In Java 11, there is no way for this library to work. Why is that?

I tried to enable JNI logging, but it didn’t work
JNI log