boolean globalFailed = false;
while(execIter.hasNext()){
ExecutorSummary execSummary = execIter.next();
String componentId = execSummary.get_component_id();
sb.append("component_id:").append(componentId).append(", ");
ExecutorInfo execInfo = execSummary.get_executor_info();
int taskStart = execInfo.get_task_start();
int taskEnd = execInfo.get_task_end();
sb.append("task_id(s) for this executor:").append(taskStart).append("-").append(taskEnd).append(", ");
String host = execSummary.get_host();
sb.append("host:").append(host).append(", ");
int port = execSummary.get_port();
sb.append("port:").append(port).append(", ");