@Override
    public String toString() {
        return "DefaultAgentProperty{" +
                "applicationName='" + applicationName + '\'' +
                ", agentId='" + agentId + '\'' +
                ", agentStartTime=" + agentStartTime +
                ", properties=" + properties +
                ", serviceType=" + serviceType +
                '}';
    }
@author Woonduk Kang(emeroad)
@author jaehong.kim
collector/src/main/java/com/navercorp/pinpoint/collector/service/async/DefaultAgentProperty.java