Node: Arbitrum poller failling without details (#1836)

* Node: Arbitrum poller failling without details

Change-Id: Id067d0be18a7c391ef90a82cc78f0684c72ab2ad

* Add a comment.

Change-Id: I4d2ef2ea44febc2a1462ac22a3a3e977b09e6545

node/pkg/watchers/evm/connectors/poller.go

@@ -67,10 +67,14 @@ func (b *BlockPollConnector) run(ctx context.Context) error {
 					break
 				}
 				logger.Error("polling encountered an error", zap.Error(err))
+
+				// Wait an interval before trying again. We stay in this loop so that we
+				// try up to three times before causing the watcher to restart.
+				time.Sleep(b.Delay)
 			}
 
 			if err != nil {
-				b.errFeed.Send("polling encountered an error")
+				b.errFeed.Send(fmt.Sprint("polling encountered an error: ", err))
 			}
 			timer.Reset(b.Delay)
 		}