Method initialize

src/Daemon/BaseDaemon.cpp:235–443

void BaseDaemon::initialize(Application & self)
{
    closeFDs();
    ServerApplication::initialize(self);

    /// now highest priority (lowest value) is PRIO_APPLICATION = -100, we want higher!
    argsToConfig(argv(), config(), PRIO_APPLICATION - 100);

    bool is_daemon = config().getBool("application.runAsDaemon", false);
    if (is_daemon)
    {
        /** When creating pid file and looking for config, will search for paths relative to the working path of the program when started.
          */
        std::string path = fs::path(config().getString("application.path")).replace_filename("");
        if (0 != chdir(path.c_str()))
            throw Poco::Exception("Cannot change directory to " + path);
    }

    loadConfiguration();

#if USE_JEMALLOC
    Jemalloc::setup(
        config().getBool(Jemalloc::config_enable_global_profiler, Jemalloc::default_enable_global_profiler),
        config().getBool(Jemalloc::config_enable_background_threads, Jemalloc::default_enable_background_threads),
        config().getUInt64(Jemalloc::config_max_background_threads_num, Jemalloc::default_max_background_threads_num),
        config().getBool(Jemalloc::config_collect_global_profile_samples_in_trace_log, Jemalloc::default_collect_global_profile_samples_in_trace_log),
        config().getUInt64(Jemalloc::config_profiler_sampling_rate, Jemalloc::default_profiler_sampling_rate));
#endif

    /// This must be done before creation of any files (including logs).
    mode_t umask_num = 0027;
    if (config().has("umask"))
    {
        std::string umask_str = config().getString("umask");
        std::stringstream stream; // STYLE_CHECK_ALLOW_STD_STRING_STREAM
        stream << umask_str;
        stream >> std::oct >> umask_num;
    }
    umask(umask_num);

    ConfigProcessor(config_path).savePreprocessedConfig(loaded_config, ""
#if USE_SSL
    , true // skip loading encryption keys from ZK
#endif
    );


#if defined(OS_LINUX)
    /// Configure RLIMIT_SIGPENDING
    /// (query profiler creates lots of timers - timer_create(), and this requires slot in pending signals)
    if (auto pending_signals = config().getUInt64("pending_signals", 0); pending_signals > 0)
    {
        struct rlimit rlim{};
        if (getrlimit(RLIMIT_SIGPENDING, &rlim))
            throw Poco::Exception("Cannot getrlimit");

        /// Only adjust if the current soft limit is below the requested value.
        if (rlim.rlim_cur < pending_signals)