final long pid = ProcessHandle.current().pid();
        assertEquals(hostname + ":" + pid, systemHelper.getInstanceId());
    }

    @Test
    public void test_getInstanceId_withTargetName() {
        // When scheduler.target.name is set, instanceId is targetName@hostname:pid
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;