push stream to srs ,the pusher is end, the console show status is no stream ,can't repush immediately


1. I use ffmpeg push video stream to srs by RTMP format  , eg  livestream_1
2. I close ffmpeg process , at now,the srs show the push status is no stream for the pusher
3. immediately ,I begin push the same stream to SRS , I get the I/O error  for livetream_1
4. about two or three minutes ,I can push the same stream success. 

I want repush the same stream  work immediately.

