Merge pull request #382 from lbryio/silence_socket_error

silence "[Errno 11] Resource temporarily unavailable" error

CHANGELOG.md

@@ -8,6 +8,8 @@ can and probably will change functionality and break backwards compatability
 at anytime.
 
 ## [Unreleased]
+### Fixed
+ * Change EWOULDBLOCK error in DHT to warning. #481
 
 ## [0.8.3rc0] - 2017-02-10
 ### Changed

lbrynet/dht/protocol.py

@@ -10,6 +10,8 @@
 import logging
 import binascii
 import time
+import socket
+import errno
 
 from twisted.internet import protocol, defer
 from twisted.python import failure
@@ -251,7 +253,15 @@ class KademliaProtocol(protocol.DatagramProtocol):
     def _write_and_remove(self, key, txData, address):
         del self._call_later_list[key]
         if self.transport:
+            try:
                 self.transport.write(txData, address)
+            except socket.error as err:
+                if err.errno == errno.EWOULDBLOCK:
+                    # i'm scared this may swallow important errors, but i get a million of these
+                    # on Linux and it doesnt seem to affect anything  -grin
+                    log.warning("Can't send data to dht: EWOULDBLOCK")
+                else:
+                    raise err
 
     def _sendResponse(self, contact, rpcID, response):
         """ Send a RPC response to the specified contact