uint64 time_stamp 
string task_name

float32 quit_distance
string addition_info
---
#result definition
int32 result # (>= 0 正常) (<0 异常中断)
string type # "cancel" "done" "abort"
---
#feedback
uint64 time_stamp
uint64 task_time_stamp
string task_name
int32 status
int32 progress
string info
string addition_info