Function mainEntryClickHouseServer

programs/server/Server.cpp:230–267

}

int mainEntryClickHouseServer(int argc, char ** argv)
{
    DB::Server app;
    if (jemallocOptionEnabled("opt.background_thread"))
    {
        LOG_ERROR(&app.logger(),
            "jemalloc.background_thread was requested, "
            "however ClickHouse uses percpu_arena and background_thread most likely will not give any benefits, "
            "and also background_thread is not compatible with ClickHouse watchdog "
            "(that can be disabled with CLICKHOUSE_WATCHDOG_ENABLE=0)");
    }

    /// Do not fork separate process from watchdog by default
    /// Otherwise it breaks minidump and jeprof usage
    /// Can be overridden by environment variable (cannot use server config at this moment).
    if (argc > 0)
    {
        const char * env_watchdog = getenv("CLICKHOUSE_WATCHDOG_ENABLE");
        if (env_watchdog)
        {
            if (0 == strcmp(env_watchdog, "1"))
                app.shouldSetupWatchdog(argv[0]);

            /// Other values disable watchdog explicitly.
        }
    }

    try
    {
        return app.run(argc, argv);
    }
    catch (...)
    {
        std::cerr << DB::getCurrentExceptionMessage(true) << "\n";
        auto code = DB::getCurrentExceptionCode();
        return code ? code : 1;
    }
}


namespace