程序启动后很快退出，AsyncLogging无法打印日志到文件

[liujiejie]

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Branch (cpp98/cpp11/cpp17) and version of muduo?

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muduo::AsyncLogging log_g; void GWOutputFunc(const char msg, int len) { log_g->append(msg, len); } void GWLogFlush() { log_g->stop(); }

bool GWEngine::InitLog() { char *path = getenv("HOME"); char name[256] = { 0 }; sprintf(name, "%s/log", path);

if (access(name, F_OK) != 0)
{
    mkdir(name, 0755);
}

    sprintf(name, "%s/%s", name, app_arg_.instance_name.c_str());
size_t kOneGB = 1000 * 1024 * 1024;
rlimit rl = { 2 * kOneGB, 2 * kOneGB };
setrlimit(RLIMIT_AS, &rl);
static muduo::AsyncLogging log(name, kOneGB, 1);
log_g = &log;
muduo::Logger::setLogLevel((muduo::Logger::LogLevel)(app_arg_.log_level));
muduo::Logger::setOutput(GWOutputFunc);
    muduo::Logger::setFlush(GWLogFlush);
log.start();

return 0;

} 程序启动后很快退出，异步日志AsyncLogging无法打印日志到文件，这个是啥原因啊？

[firefeifei]

问题解决了吗

[fortunely]

muduo异步日志模块，后端默认是3秒flush一次，快速启动后退出，日志消息还在FixedBuffer中，没有flush到内核缓存/磁盘。 前端Logger的析构中只有FATAL级别的日志消息，才会调用g_flush。

如果要解决这个问题，可以在进程退出前，主动flush一次。