plugin gets stuck while loading

I am trying to call a python API while loading plugin, For that I used following code

static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
{
((std::string*)userp)->append((char*)contents, size * nmemb);
return size * nmemb;
}

int starter(){
std::cout<<"pinging..............................................................";

CURL *curl;
CURLcode res;
std::string readBuffer;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "localhost:8000/init");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
std::cout<<readBuffer;

}

auto j = json::parse(readBuffer);
if (j["folder"]){
std::cout<<"Image folder is created";
}
std::cout<<j["name"];

return 0;
}

int init_caller = starter();

/**
* @param deviceInfo Various information about the related device, such as its id, vendor, model,
* etc.
*/
DeviceAgent::DeviceAgent(const nx::sdk::IDeviceInfo* deviceInfo):
// Call the DeviceAgent helper class constructor telling it to verbosely report to stderr.

ConsumingDeviceAgent(deviceInfo, /*enableOutput*/ true)
{
cameraId = deviceInfo->id();
}

starter function is called but it stuck at res = curl_easy_perform(curl); After a few minutes plugin throws

>>> ASSERTION FAILED: /home/jenkins/build-0-linux-x64-vms_4.1/nx_vms/vms/server/nx_vms_server/src/media_server_process.cpp:1202 (false) Server was unable to stop within 100s

I am not sure why it's not working. The above code works as I expected If i execute that as separate cpp file.  

Traceback log:

2020-05-08 10:37:30.440 4757 INFO START: ================================================================================
2020-05-08 10:37:30.441 4757 INFO START: Network Optix MetaVMS Media Server started, version: 4.1.0.30731, revision: 457d4da9daf1
2020-05-08 10:37:30.441 4757 INFO START: Binary path: /opt/networkoptix-metavms/mediaserver/bin/mediaserver-bin
2020-05-08 10:37:30.441 4757 INFO START: Log level: info
2020-05-08 10:37:30.441 4757 INFO START: Log file size: 10M, backup count: 25, file: /opt/networkoptix-metavms/mediaserver/var/log/log_file.log
2020-05-08 10:37:30.441 4757 INFO START: Mutex implementation: qt
2020-05-08 10:37:30.442 4757 INFO nx::vms::server::RootFileSystem: Root tool enabled: false
2020-05-08 10:37:30.442 4757 WARNING nx::vms::server::nvr::hanwha: Unable to get board id, result -1
2020-05-08 10:37:30.446 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libaxis_analytics_plugin.so]
2020-05-08 10:37:30.447 4757 INFO PluginManager(0x7fd49405d370): Loaded Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libaxis_analytics_plugin.so] (main interface nx_sdk_analytics_IPlugin)
2020-05-08 10:37:30.447 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libdahua_analytics_plugin.so]
2020-05-08 10:37:30.447 4757 INFO PluginManager(0x7fd49405d370): Loaded Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libdahua_analytics_plugin.so] (main interface nx_sdk_analytics_IPlugin)
2020-05-08 10:37:30.448 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libdw_mtt_analytics_plugin.so]
2020-05-08 10:37:30.448 4757 INFO PluginManager(0x7fd49405d370): Loaded Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libdw_mtt_analytics_plugin.so] (main interface nx_sdk_analytics_IPlugin)
2020-05-08 10:37:30.448 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libgeneric_multicast_plugin.so]
2020-05-08 10:37:30.449 4757 INFO PluginManager(0x7fd49405d370): Loaded Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libgeneric_multicast_plugin.so] (old SDK, main interface nxpl_Plugin)
2020-05-08 10:37:30.449 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libgeneric_rtsp_plugin.so]
2020-05-08 10:37:30.449 4757 INFO PluginManager(0x7fd49405d370): Loaded Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libgeneric_rtsp_plugin.so] (old SDK, main interface nxpl_Plugin)
2020-05-08 10:37:30.449 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libhanwha_analytics_plugin.so]
2020-05-08 10:37:30.450 4757 INFO PluginManager(0x7fd49405d370): Loaded Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libhanwha_analytics_plugin.so] (main interface nx_sdk_analytics_IPlugin)
2020-05-08 10:37:30.451 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libhikvision_analytics_plugin.so]
2020-05-08 10:37:30.451 4757 INFO PluginManager(0x7fd49405d370): Loaded Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libhikvision_analytics_plugin.so] (main interface nx_sdk_analytics_IPlugin)
2020-05-08 10:37:30.451 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libmjpeg_link_plugin.so]
2020-05-08 10:37:30.452 4757 INFO PluginManager(0x7fd49405d370): Loaded Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libmjpeg_link_plugin.so] (old SDK, main interface nxpl_Plugin2)
2020-05-08 10:37:30.452 4757 INFO PluginManager(0x7fd49405d370): Considering to load Server plugin [/opt/networkoptix-metavms/mediaserver/bin/plugins/libsample_analytics_plugin.so]
2020-05-08 10:38:13.164 4749 WARNING QMessageLogContext(0x562d44ad1a78): Stopping server
2020-05-08 10:39:53.164 4749 ERROR CRASH: ASSERTION FAILED: /home/jenkins/build-0-linux-x64-vms_4.1/nx_vms/vms/server/nx_vms_server/src/media_server_process.cpp:1202 (false) Server was unable to stop within 100s