restore EOF handling on TCP failed conns

Author: jackofallops

sdk/client/client.go

@@ -780,7 +780,7 @@ func extendedRetryPolicy(resp *http.Response, err error) (bool, error) {
 	tcpDialTCPRe := regexp.MustCompile(`dial tcp`)
 
 	// A regular expression to match complete packet loss - see comment below on packet-loss scenarios
-	// completePacketLossRe := regexp.MustCompile(`EOF$`)
+	completePacketLossRe := regexp.MustCompile(`EOF`)
 
 	if err != nil {
 		var v *url.Error
@@ -809,11 +809,10 @@ func extendedRetryPolicy(resp *http.Response, err error) (bool, error) {
 				return false, v
 			}
 
-			// TODO - Need to investigate how to deal with total packet-loss situations that doesn't break LRO retries.
-			// Such as Temporary Proxy outage, or recoverable disruption to network traffic (e.g. bgp events etc)
-			// if completePacketLossRe.MatchString(v.Error()) {
-			//	return false, v
-			// }
+			// Such as Temporary Proxy outage, or recoverable disruption to network traffic (e.g. bgp events, Proxy failures etc)
+			if completePacketLossRe.MatchString(v.Error()) {
+				return false, v
+			}
 
 			var certificateVerificationError *tls.CertificateVerificationError
 			if ok := errors.As(v.Err, &certificateVerificationError); ok {