run_as_daemon 之后无法发送http请求

[yqmm666]

前台运行时候正常可以发送httpclient请求（异步）
run_as_daemon切到后台后，无法正确发送。
查看trace的log 发现move to queue之后没有got a new task

[an-tao]

你发送http请求是在run as daemon之后吗？最好写个最小demo复现这个问题，我就可以本地调试看看

[yqmm666]

drogon::app().loadConfigFile(path_server_root / "config.json");
drogon::app().setUploadPath(path_upload);

if (run_as_daemon)
{ //
    drogon::app().setLogPath(path_log_files);
    drogon::app().enableRunAsDaemon();
}
else
    Create_PidFile(path_server_root);

我发现当我的config.json文件中含有redis_clients的配置时，run_as_daemon后无法发送httpclient，当我删除config.json中的redis相关配置时一切正常。（实际我的程序中没有用到redis,配置中的redis描述是之前项目的残留）

"redis_clients": [
{
//name: Name of the client,'default' by default
//"name":"",
//host: Server IP, 127.0.0.1 by default
"host": "127.0.0.1",
//port: Server port, 6379 by default
"port": 6379,
//username: '' by default which means 'default' in redis ACL
"username": "",
//passwd: '' by default
"passwd": "",
//db index: 0 by default
"db": 0,
//is_fast: false by default, if it is true, the client is faster but user can't call
//any synchronous interface of it.
"is_fast": false,
//number_of_connections: 1 by default, if the 'is_fast' is true, the number is the number of
//connections per IO thread, otherwise it is the total number of all connections.
"number_of_connections": 1,
//timeout: -1.0 by default, in seconds, the timeout for executing a command.
//zero or negative value means no timeout.
"timeout": -1.0
}
],

这些信息是否足够？

[yqmm666]

发送httpclient是在run_as_daemon之后，在我的server收到一个请求后，我要在这个请求中去httpclient给另外一个server。
并且关键是，我的项目规划确实需要redis。

[an-tao]

按理说，HttpClient和redisClient是没有关系的。如果他们冲突了，一定有潜在的bug。你可以先自己在框架里加些断点或者log尝试解决。我需要完整的demo才好调试，因为触发这个问题跟具体的写法可能密切相关。

[yqmm666]

`#include <drogon/drogon.h>

#include
#include

#ifdef linux
#include <sys/socket.h>
#include <netinet/tcp.h>
#endif

using namespace drogon;

int nth_resp = 0;

int main(int argc, char const* argv[])
{

bool run_as_daemon{ false };

if (argc == 2 && std::string(argv[1]) == "-d")
{
    LOG_INFO << "enableRunAsDaemon";
    run_as_daemon = true;

}

app().loadConfigFile("config_test.json");
app().setLogPath("./"); 
app().addListener("0.0.0.0", 5888);

if (run_as_daemon)
{ //

    drogon::app().enableRunAsDaemon();
}
trantor::Logger::setLogLevel(trantor::Logger::kDebug);

app().registerHandler(
    "/test",
    [](const HttpRequestPtr&,
        std::function<void(const HttpResponsePtr&)>&& callback) {

            auto client = HttpClient::newHttpClient("http://www.baidu.com");
            auto req = HttpRequest::newHttpRequest();
            req->setMethod(drogon::Get);
            req->setPath("/s");
            req->setParameter("wd", "wx");
            req->setParameter("oq", "wx");
            client->sendRequest(
                req, [callback](ReqResult result, const HttpResponsePtr& response) {
                    if (result != ReqResult::Ok)
                    {
                        LOG_INFO
                            << "error while sending request to server! result: "
                            << result;
                        auto resp = HttpResponse::newHttpResponse();
                        resp->setBody("send error!");
                        callback(resp);
                        return;
                    }

                    LOG_INFO << "receive response!";
                    auto resp = HttpResponse::newHttpResponse();
                    resp->setBody("send ok!");
                    callback(resp);
                });



    },
    { Get });



app().run();

}

config_test.json

`
demo我是这样写的，config_test.json里面删掉redies部分就可以正常 run_as_daemon.不知道是不是对框架的理解不够，哪里写的不对，请查看，谢谢~