Chaosd run as a server, how to set http request header

[dbaicss]

1. chaosd server -p 9288
2. chaosd attack jvm exception --class main --method hello* --exception 'java.io.IOException("BOOM")' --pid 3699
   after excute 1,2 cmd, the log follow
   [2023/10/12 16:23:37.447 +08:00] [INFO] [jvm.go:90] ["submit rules"] [output="HTTP/1.1 400 Bad Request\nContent-Type: text/plain; charset=utf-8\nConnection: close\n\n400 Bad Request\n\n"]

how to set chaosd http request header, solve the promblem, thxs!