Could not load metrics? An error while viewing the data of canary report


May I know the error reason of the attached screenshot? If needed, I’d like to provide another logs.

This is my kayenta-log.
2018-08-30 03:04:22.955 ERROR 1 — [.0-8090-exec-27] c.n.s.k.w.e.GenericExceptionHandlers : Internal Server Error

org.apache.catalina.connector.ClientAbortException: Broken pipe

2018-08-30 03:04:22.958  WARN 1 --- [.0-8090-exec-27] .m.m.a.ExceptionHandlerExceptionResolver : Failed to invoke @ExceptionHandler method: public void,javax.servlet.http.HttpServletResponse,javax.servlet.http.HttpServletRequest) throws

java.lang.IllegalStateException: Cannot call sendError() after the response has been committed


what could be cause the error as the attachment