amazon web services - CloudHaskell running on AWS -


i have created 3 ec2 ubuntu instances on aws , trying run code:

module main  remotabledecl [ [d|   distribute :: ([nodeid], int) -> process ()   distribute (slaves, x) =     let x' = mymath x         nextnode = slaves !! (x' `mod` (length slaves))     $ show x ++ " - 1 = " ++ show x'     unless (x' == 0) $       void $ spawn nextnode $ $(mkclosure 'distribute) (slaves, mymath x)   |]]  remotetable = __remotetabledecl initremotetable  master :: backend -> [nodeid] -> process () master backend slaves =   liftio . putstrln $ "slaves: " ++ show slaves   distribute (slaves, 15)   terminateallslaves backend  main :: io () main =   prog <- getprogname   args <- getargs    case args of     ["master", host, port] ->       backend <- initializebackend host port remotetable       startmaster backend (master backend)     ["slave", host, port] ->       backend <- initializebackend host port remotetable       startslave backend

by these commands stated here https://hackage.haskell.org/package/distributed-process-simplelocalnet-0.2.3.2/docs/control-distributed-process-backend-simplelocalnet.html

$ stack exec -- test slave 172.31.3.226 8080 &

$ stack exec -- test slave 172.31.3.227 8080 &

$ stack exec -- test master 172.31.3.228 8080

ips private ips of aws instances. when run master, there no slaves connected. output:

slaves: []

tue jul 26 17:45:04 utc 2016 pid://172.31.3.228:8000:0:10: 15 - 1 = 14

test: divide zero

there should slaves connected in output, there not.


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