@Override
    public String toString() {
        return "{" + "objectName='" + objectName + '\'' +
                ", isContainer=" + isContainer +
                ", startTime=" + startTime +
                ", pid=" + pid +
                ", machineName='" + machineName + '\'' +
                ", hostIp='" + hostIp + '\'' +
                ", serverType=" + serverType +
                ", jvmVersion='" + jvmVersion + '\'' +
                ", agentVersion='" + agentVersion + '\'' +
                ", clusterNamespace='" + clusterNamespace + '\'' +
                '}';
    }
@author emeroad
@author koo.taejin
@author hyungil.jeong
agent-module/profiler/src/main/java/com/navercorp/pinpoint/profiler/DefaultAgentInformation.java