why kafka php consumer code running infinite

Question

I am using arnaud-lb/php-rdkafka as kafka PHP client. I installed kafka client with PECL. I am using the following code for consuming data.

$conf = new RdKafka\Conf();
$conf->set('group.id', 'myConsumerGroup');
$rk = new RdKafka\Consumer($conf);
$rk->addBrokers("127.0.0.1");
$topicConf = new RdKafka\TopicConf();
$topicConf->set('auto.commit.interval.ms', 100);
$topicConf->set('offset.store.method', 'broker');
$topicConf->set('auto.offset.reset', 'earliest');
$topic = $rk->newTopic("test", $topicConf);
$topic->consumeStart(0, RD_KAFKA_OFFSET_STORED);
while (true) {
    $message = $topic->consume(0, 120*10000);
    switch ($message->err) {
        case RD_KAFKA_RESP_ERR_NO_ERROR:
            var_dump($message);
            break;
        case RD_KAFKA_RESP_ERR__PARTITION_EOF:
            echo "No more messages; will wait for more\n";
            break;
        case RD_KAFKA_RESP_ERR__TIMED_OUT:
            echo "Timed out\n";
            break;
        default:
            throw new \Exception($message->errstr(), $message->err);
            break;
    }
}

Even I changed while loop to for loop till 2 indexes like following but still same issue persists.

for($i=0;$i<2;$i++) {
    
}

I enabled port 9092 in Apache /etc/apache2/ports.conf by adding the following line in it

Listen 9092

I am not getting what causing it to run infinitely?