NullPointerException when calling Application.isStarted because app is null

[ManishJain-TomTom]

Describe the bug

When trying to use the @QuarkusMain annotation with main method, the application fails to start with a NPE mentioning that the app is null.

Below is our class:

@QuarkusMain
public class Main implements QuarkusApplication {

    static Logger logger = Logger.getLogger(FlinkTestJob.class.getName());
    @Inject
    FlinkTestJob flinkTestJob;

    public static void main(String[] args) throws Exception {
        Quarkus.run(Main.class, args);
    }

    public void run() throws Exception {
        logger.info("Going to run method with FlinkTestJob: "+flinkTestJob);
        flinkTestJob.run();
    }

    @Override public int run(String... args) throws Exception {
        logger.info("Going to run method with FlinkTestJob Quarkus Run: "+flinkTestJob);
        flinkTestJob.run();

        Quarkus.waitForExit();
        return 0;
    }
}

When I run this application, I get the below error:
Exception:

Exception in thread "Shutdown thread" java.lang.NullPointerException: Cannot invoke "io.quarkus.runtime.Application.isStarted()" because "app" is null
	at io.quarkus.runtime.ApplicationLifecycleManager$ShutdownHookThread.run(ApplicationLifecycleManager.java:455)

How are we running it:
We are creating a package using mvn clean install, then then using flink to run this class. Will that have an impact on the app being null?

Expected behavior

We'd be able to run the application without any problems. As we are inject FlinkTestJob in the Main class, we'd be able to call FlinkTestJob::run method.

Actual behavior

The application fails to start with exception:

Exception in thread "Shutdown thread" java.lang.NullPointerException: Cannot invoke "io.quarkus.runtime.Application.isStarted()" because "app" is null
	at io.quarkus.runtime.ApplicationLifecycleManager$ShutdownHookThread.run(ApplicationLifecycleManager.java:455)

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

openjdk version "21.0.4" 2024-07-16
OpenJDK Runtime Environment Homebrew (build 21.0.4)
OpenJDK 64-Bit Server VM Homebrew (build 21.0.4, mixed mode, sharing)

Quarkus version or git rev

3.13.3

Build tool (ie. output of mvnw --version or gradlew --version)

mvn --version:

Maven home: /opt/homebrew/Cellar/maven/3.9.9/libexec
Java version: 21.0.4
OS name: "mac os x", version: "14.5", arch: "aarch64", family: "mac"

Additional information

We are trying to run the created jar with flink application.
Command used:
./flink run -c com.flink.Main -d flink/target/flink-stream-processor-1.0.0-SNAPSHOT-runner.jar

[geoand]

Any chance you can share a sample application we can use to see the problem in action?

[gsmet]

Wonder if it could be #42794 .

[ManishJain-TomTom]

Yeah, looks similar. Maybe we can close this one as a duplicate. I see that the ticket is merged into 3.14 and 3.13 main. But is it released, or will that take some more time?

[geoand]

Okay, let's close as a duplicate for now.

The fix is not yet part of a release, but will be soon