docker镜像 canal/canal-server:v1.1.5 app.sh stop部份里的stop_exporter写成了start_exporter，如下：

app.sh

echo "==> START ..."

start_exporter
start_canal

echo "==> START SUCCESSFUL ..."

tail -f /dev/null &

wait TERM signal

waitterm

echo "==> STOP"

stop_canal
start_exporter

echo "==> STOP SUCCESSFUL ..."