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pingLoop(interval:number): void{
        setInterval(() => {
            
            this.pingNode(this.index);
            if (this.index == this.nodes.length-1) 
                this.index = 0;
            else
                this.index++;
            
            this.getAliveNodesUrl(); 

           
        }, interval); 
        console.log("Node ping Loop began...:");      
    }

    /**
    * Get url array of alive Nodes 
    * @return   {Array<string>}   
    */
    private getAliveNodesUrl(): Array<string>{
        let aliveNodes : string[] = [];  

        for (let id = 0; id < this.nodes.length; id++) {
            console.log(id)
            console.log(this.nodes[id].options.port)
            if (this.nodes[id].state == "alive") {
                let noreUrl: string = this.nodes[id].getNodeUrl()
                aliveNodes.push(noreUrl);
                console.log(noreUrl);
            }
        }

In the Nodemanager class, the pingloop isuccessfully pinging all the nodes of the list.
After having contacted a node in the list the getAliveNodesUrl() method should, if it is alive, retrieve its Url. But instead of that it retrieves the url of the next node to contact