Multi threaded HTTP server socket hangs with CLOSE_WAIT - c++

Question

I have a C++ server application. The server application is acting as a HTTP
server in this case. With the large number of requests socket move to the
CLOSE_WAIT state.With small number of requests its working fine.
void *task1(void *);
static int connFd;
int noThread = 0;
int main()
{
int pId, portNo, listenFd;
socklen_t len; //store size of the address
bool loop = false;
struct sockaddr_in svrAdd, clntAdd;
pthread_t threadA[500];
portNo = 9898 ;
cout<<"td::string::npos = "<<std::string::npos<<endl;
if((portNo > 65535) || (portNo < 2000))
{
cout<<"Please enter a port number between 2000 - 65535";
return 0;
}
//create socket
listenFd = socket(AF_INET, SOCK_STREAM, 0);
if(listenFd < 0)
{
cout<< "Cannot open socket"<<endl;
return 0;
}
bzero((char*) &svrAdd, sizeof(svrAdd));
svrAdd.sin_family = AF_INET;
svrAdd.sin_addr.s_addr = INADDR_ANY;
svrAdd.sin_port = htons(portNo);
//bind socket
if(bind(listenFd, (struct sockaddr *)&svrAdd, sizeof(svrAdd)) < 0)
{
cout<<"Cannot bind"<<endl;;
return 0;
}
listen(listenFd, 5);
len = sizeof(clntAdd);
while (noThread < 500)
{
cout<<"Listening"<<endl;
//this is where client connects. svr will hang in this mode until client conn
connFd = accept(listenFd, (struct sockaddr *)&clntAdd, &len);
if (connFd < 0)
{
cout<<"Cannot accept connection"<<endl;
return 0;
}
else
{
cout<<"Connection successful" <<endl;
}
//pthread_create(&threadA[noThread], NULL, test::task1, NULL);
//thr_create(&threadA[noThread], NULL, task1, NULL);
pthread_create(&threadA[noThread], NULL, task1, NULL);
noThread++;
cout<<"Number of noThread :"<< noThread;
}
for(int i = 0; i < 500; i++)
{
pthread_join(threadA[i], NULL);
//thr_join(threadA[i], NULL);
cout<<"inside join"<<i;
}
}
void *task1 (void *dummyPt)
{
cout<<"Thread No: " << pthread_self();
char test[1000];
bzero(test, 1001);
bool loop = false;
int t=0;
while(t==0)
{
bzero(test, 1001);
read(connFd, test, 1001);
string t1(test);
if(tester.find("connection_request")!=std::string::npos){
if(connFd)
{
cout<<"T1 :"<<t1<<endl;
send(connFd, "HTTP/1.0 200 OK\n\n", 17, 0);
write(connFd,"Test Response",13);
}
else
cout << "Problem With collection FD";
t=1;
}
}
cout<<"Closing thread and conn"<<endl;
close(connFd);
noThread--;
return NULL;
}