Questions about MQFaultStrategy.java

[衡友海]

I have a problem reading the code below
MQFaultStrategy#selectOneMessageQueue():
public MessageQueue selectOneMessageQueue(final TopicPublishInfo tpInfo, final 
String lastBrokerName) {
    if (this.sendLatencyFaultEnable) {
        try {
            int index = tpInfo.getSendWhichQueue().getAndIncrement();
            for (int i = 0; i < tpInfo.getMessageQueueList().size(); i++) {
                int pos = Math.abs(index++) % 
tpInfo.getMessageQueueList().size();
                if (pos < 0)
                    pos = 0;
                MessageQueue mq = tpInfo.getMessageQueueList().get(pos);
                if (latencyFaultTolerance.isAvailable(mq.getBrokerName())) {
                    if (null == lastBrokerName || 
mq.getBrokerName().equals(lastBrokerName))
                        return mq;
                }
            }

            final String notBestBroker = latencyFaultTolerance.pickOneAtLeast();
            int writeQueueNums = tpInfo.getQueueIdByBroker(notBestBroker);
            if (writeQueueNums > 0) {
                final MessageQueue mq = tpInfo.selectOneMessageQueue();
                if (notBestBroker != null) {
                    mq.setBrokerName(notBestBroker); // 此处会不会有线程安全问题??
                    mq.setQueueId(tpInfo.getSendWhichQueue().getAndIncrement() 
% writeQueueNums);
                }
                return mq;
            } else {
                latencyFaultTolerance.remove(notBestBroker);
            }
        } catch (Exception e) {
            log.error("Error occurred when selecting message queue", e);
        }

        return tpInfo.selectOneMessageQueue();
    }

    return tpInfo.selectOneMessageQueue(lastBrokerName);
}
My question is whether the use of ‘mq.setBrokerName’ and ‘setQueueId’ is going 
to be a thread-safe problem when multiple thread try to modify it?