Merge pull request moby#3882 from tonistiigi/healthcheck-log-fix

session: avoid logging healthcheck error on canceled connection

Author: tonistiigi

session/grpc.go

@@ -112,6 +112,11 @@ func monitorHealth(ctx context.Context, cc *grpc.ClientConn, cancelConn func())
 			}
 
 			if err != nil {
+				select {
+				case <-ctx.Done():
+					return
+				default:
+				}
 				if failedBefore {
 					bklog.G(ctx).Error("healthcheck failed fatally")
 					return