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[libvirt] Error connecting to virConnectOpen("qemu:///system"); after 20 times



Hi,

I am using libvirt api to create an app, I am facing a problem.

I can connect to connection object 20 number of times in programm after that it gives connection object null.

Here is the sample code.

 

Normally code should run 1000 times but it only runs 20 times

Filename: list.cpp

 

#include<pthread.h>

#include<stdlib.h>

#include<stdio.h>

#include<malloc.h>

#include <iostream>

#include<string.h>

#include <libvirt/libvirt.h>

#include <libvirt/virterror.h>

static int count;

    static void customErrorFunc(void *userdata, virErrorPtr err)

    {

    }

 

int main()

{

    virConnectPtr conn;

 

  for ( int i=0; i< 1000;i++)

  {

     conn = virConnectOpen("qemu:///system");

     if (conn == NULL) {

        fprintf(stderr, "Failed to open connection to qemu:///system\n");

        printf("Failed to open connection to qemu:///system\n");

        virConnectClose(conn);

        return NULL;

        }

        printf("Hello %d\n",i);

        virError err;

        virSetErrorFunc(NULL, customErrorFunc);

        int j;

        int numDomains1,numDomains2,numDomains;

        int *activeDomains;

        numDomains1 = virConnectNumOfDomains(conn);

        activeDomains = (int*)malloc(sizeof(int) * numDomains1);

        numDomains1 = virConnectListDomains(conn, activeDomains, numDomains1);

        for (int j = 0 ; j < numDomains1 ; j++)

        {

                virDomainPtr dom;

                dom = virDomainLookupByID(conn,activeDomains[j]);

                free(dom);

        }

        free(activeDomains);

        count--;

        virConnectClose(conn);

   }

}

 

 

Output:

Hello 0

Hello 1

Hello 2

Hello 3

Hello 4

Hello 5

Hello 6

Hello 7

Hello 8

Hello 9

Hello 10

Hello 11

Hello 12

Hello 13

Hello 14

Hello 15

Hello 16

Hello 17

Hello 18

Hello 19

Failed to open connection to qemu:///system

Failed to open connection to qemu:///system

 

 

Can any one tell me where I am going wrong.

Regards,

Pankaj Rawat

NECHCL ST

 


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