Socket closed when subscribe 3000 topics

AMQJS0008I Socket closed

```
function onConnect() {
// Once a connection has been made, make a subscription and send a message.
console.log("onConnect");
// client.subscribe("World");
//about 3000 topics
for (var i = 0; i < topics.length; i++) {
var topic = topics[i];
for (var key in topic) {
client.subscribe(key);
//console.log("subscribe:"+key); when add this line will be ok. It seems to be blocking
current thread
}
}

}

// called when the client loses its connection
function onConnectionLost(responseObject) {
if (responseObject.errorCode !== 0) {
console.log("onConnectionLost:" + JSON.stringify(responseObject));
}else{
console.log("onConnectionLost:" + 0 );
}
}

```
How to subscribe to multiple topics using one request?
If have any idea how to solve this issue, please help me!