Qt Service无法进入事件循环问题排查与解决求助

我基于Qt Solutions仓库中的QtService旧代码开发了一个Windows服务，目标是系统启动时自动执行npm start命令启动网站。在添加-exec参数以应用模式启动时，功能运行正常，但切换到服务模式后完全没有反应。调试发现服务并未正确进入事件循环，因此编写了一段向TXT文件写入文本的示例代码来复现问题。

示例代码 #

insuranceservice.h #

#ifndef INSURANCESERVICE_H
#define INSURANCESERVICE_H

#include <QCoreApplication>
#include <QObject>
#include <QThread>
#include <QDebug>
#include "qtservice.h"
#include "servicelogger.h"

class InsuranceService : public QtService<QCoreApplication>
{
    Q_GADGET
public:
    InsuranceService(int argc, char *argv[]);
    ~InsuranceService();

private:
    void start();
    void stop();
    void pause();
    void resume();
    void processCommand(int code);
    void createApplication(int &argc, char *argv[]);
};

#endif // INSURANCESERVICE_H

insuranceservice.cpp #

#include "insuranceservice.h"

InsuranceService::InsuranceService(int argc, char *argv[]) : QtService<QCoreApplication>(argc, argv, "InsuranceService")
{
    std::cout << serviceName().toStdString().c_str() << std::endl;
    setServiceDescription("Test service");
    setServiceFlags(QtServiceBase::CanBeSuspended);
    //setStartupType(QtServiceController::AutoStartup);
}

void InsuranceService::start()
{
    try {
        QCoreApplication *insuranceApp = application();
        QFile *logFile = new QFile(ServiceLogger::getLogPath(), insuranceApp); 
        logFile->open(QIODevice::WriteOnly | QIODevice::Append);
        ServiceLogger::writeLog(logFile, QString("Test...").toUtf8());
        logFile->close();
        logFile->deleteLater();
    } catch (...) {
        qCritical() << "Failed to start the service!!!";
    }
}

void InsuranceService::stop()
{

}

void InsuranceService::pause()
{

}

void InsuranceService::resume()
{

}

void InsuranceService::processCommand(int code)
{
    Q_UNUSED(code);
}

void InsuranceService::createApplication(int &argc, char *argv[])
{
    QtService::createApplication(argc, argv);
}

InsuranceService::~InsuranceService()
{

}

main.cpp #

#include <QCoreApplication>
#include "insuranceservice.h"

int main(int argc, char *argv[])
{
    InsuranceService service(argc, argv);
    return service.exec();
}

请问如何让服务正确进入事件循环？

更新内容 #

我尝试使用QtService内置的logMessage方法测试服务运行状态：

void InsuranceService::start()
{
    logMessage("The start method executing....", QtServiceBase::Success, 0, 0);
    QFile *logFile = new QFile(ServiceLogger::getLogPath());
    logFile->open(QIODevice::WriteOnly | QIODevice::Append);
    ServiceLogger::writeLog(logFile, QString("Test...").toUtf8());
    logFile->close();
    logFile->deleteLater();
}

在Windows事件查看器中可以看到日志信息：The start method executing....，但logMessage()之后的代码均未执行，预期生成的日志文件也不存在。怀疑logMessage和QFile操作运行在不同的应用实例中，需要连接到正确的实例，求解决办法。

内容的提问来源于stack exchange，提问作者Hunter91151