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delay new connection in case of exausted files #1004

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delay new connection in case of exausted files #1004

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21 changes: 13 additions & 8 deletions warp/Network/Wai/Handler/Warp/Run.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,8 @@ import qualified Control.Exception
import qualified Data.ByteString as S
import Data.IORef (newIORef, readIORef)
import Data.Streaming.Network (bindPortTCP)
import Foreign.C.Error (Errno (..), eCONNABORTED)
import Foreign.C.Error (Errno (..), eCONNABORTED, eMFILE)
import GHC.Conc (threadDelay)
import GHC.IO.Exception (IOErrorType (..), IOException (..))
import Network.Socket (
SockAddr,
Expand Down Expand Up @@ -305,13 +306,17 @@ acceptConnection set getConnMaker app counter ii = do
case ex of
Right x -> return $ Just x
Left e -> do
let eConnAborted = getErrno eCONNABORTED
getErrno (Errno cInt) = cInt
if ioe_errno e == Just eConnAborted
then acceptNewConnection
else do
settingsOnException set Nothing $ toException e
return Nothing
let getErrno (Errno cInt) = cInt
isErrno err = ioe_errno e == Just (getErrno err)
case () of
_ | isErrno eCONNABORTED -> acceptNewConnection
| isErrno eMFILE -> do
settingsOnException set Nothing $ toException e
threadDelay 100000
acceptNewConnection
| otherwise -> do
settingsOnException set Nothing $ toException e
return Nothing

-- Fork a new worker thread for this connection maker, and ask for a
-- function to unmask (i.e., allow async exceptions to be thrown).
Expand Down