scala - Akka actor remote dissociation from sending a delayed response -


so have client server based program, client send request server, server computation , response. done via ask.

specifically client receive message client app , send call ask

      val response = ask(actorref, sessionmessage(token, message)).mapto[responsemessage]

the server receive so

val response = sessionmessage.message match {       case message: message1 =>         ask(actorset.actor1,message)       case message: message2 =>         ask(actorset.actor2,message)

where actorset literally set of different actors.

i collect result , send sender

val responseresult = response.mapto[responsemessage]     responseresult pipeto sender

the problem i'm running of requests, database query can take while (5-10 minutes) , when query completes sends dead letters , dissociation , unable associate again , sends dead letters.

i thought because took long, sender time out (or sender reference) stored sender reference val, , confirmed doing sender reference lost. however, as query finishes , pipe correct sender, dissociates. other queries take minute or don't seem suffer problem, ones last few minutes dissociate , need restart server or server keep sending dead letters.

even if oncomplete send on success or await.result, same issue occurs, tries send message (after completion) server dissociates , sends dead letters.

i'm @ lost why happening.

the problem ask has timeout, separate timeout might specify in await.result. full signature ask is:

def ask (actorref: actorref, message: any)(implicit timeout: timeout): future[any]

this means if did not manually provide value timeout , did not define implicit yourself, must inheriting 1 via 1 of imports.

to extend timeout particular ask, call one:

ask(actorref, sessionmessage(token, message))(15.minutes).mapto[responsemessage]

or if applies asks in scope, declare own implicit:

implicit val timeout = timeout(15.minutes)

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