Thank you for answer @marcospereira
I run on PROD mode and Play’s version is 2.6.12.
Additionally, I config reference.conf like this
akka {
http {
server {
backlog = 1000
max-connections = 4096
}
client {
connecting-timeout = 200ms
idle-timeout = 500ms
}
host-connection-pool {
max-connections = 16
max-retries = 0
}
}
}