scala - Time to live on host-level akka-http client connection -

i have service running on production, calls dependency service using :

http().newhostconnectionpoolhttps[promise[httpresponse]]

each time new stack of dependency service deployed, service dns cache updated setting :

java.security.security.setproperty("networkaddress.cache.ttl" , "60")

problem connections inside pool lives on forever , resolves dns once @ initiation time. keeps calling old dependency stack.

i searching away set max connection's time live.

akka-http has functionality build in, can settings in reference config

in short have put following key config (application.conf likely):

akka {   io {     dns {       inet-address {          # set time cache name resolutions         # possible values:         # default: sun.net.inetaddresscachepolicy.get() , getnegative()         # forever: cache forever         # never: no caching         # n [time unit]: positive timeout unit, example "30 s"          positive-ttl = 20s         negative-ttl = 10s       }     }   } } 

and have do. connection pool ttls set sensible values default can find them here.