我试图将我的应用程序容器化，但是我在log4cplus的工作上遇到了麻烦。最重要的是，当在主机上运行时，日志可以工作，但是当我从长时间运行的循环中日志时，在容器中就不行了。看起来好像某个地方的缓冲区没有被刷新。下面是一个最小的例子。
此外，删除长寿命循环也解决了这个问题，大概log4cplus在关闭之前会最后一次刷新。延长休眠持续时间似乎没有帮助。
main.cpp

# include <iostream>

# include <unistd.h>

# include <log4cplus/logger.h>

# include <log4cplus/loggingmacros.h>

# include <log4cplus/configurator.h>

# include <log4cplus/initializer.h>

int main(int argc, char**argv)
{
    std::cout << "Sanity Check" << std::endl;

    auto log4cplus = ::log4cplus::Initializer();
    std::string logconfig("log4cplus_configure.ini");
    ::log4cplus::PropertyConfigurator::doConfigure(logconfig);
    auto logger = ::log4cplus::Logger::getInstance(LOG4CPLUS_TEXT("main"));

    while (true) { 
        LOG4CPLUS_ERROR(logger, "Sleeping...");
        // std::cout << "cout sleep..." << std::endl; // uncomment to get log messages working
        sleep(1);
    }

    return 0;
}

log4cplus_configure.ini

log4cplus.rootLogger=INFO, MyConsoleAppender
log4cplus.appender.MyConsoleAppender=log4cplus::ConsoleAppender
log4cplus.appender.MyConsoleAppender.layout=log4cplus::PatternLayout
log4cplus.appender.MyConsoleAppender.layout.ConversionPattern=[%-5p][%d] %m%n

停靠文件

FROM rockylinux:latest

RUN dnf install -y boost-system

COPY ./build/sandbox /
COPY ./log4cplus_configure.ini /

CMD  ["/sandbox"]

CMakeLists.txt

cmake_minimum_required(VERSION 3.10)
set (CMAKE_CXX_STANDARD 17)

# Project executable and library

add_executable(sandbox main.cpp)

target_link_libraries(sandbox
    PUBLIC liblog4cplus.a
    PUBLIC pthread
    PUBLIC boost_system
)