private void reportSucceededAndExit() {
        Date now = new Date();
        heartbeatThread.setContainersFinishTime(now.toString());
        heartbeatThread.setContainerStatus(HboxContainerStatus.SUCCEEDED);
        Utilities.sleep(heartbeatInterval);

        Span.current()
                .setStatus(StatusCode.OK)
                .setAttribute("process.exit.code", (long) 0)
                .end();
        HboxOpenTelemetry.flush();

        System.exit(0);
    }
code=0: container is successful
code>0: container is failed, for example: python 137 means being kill SIGKILL
code=-1: container is killed by website
core/src/main/java/net/qihoo/hbox/container/HboxContainer.java