Fix slow connection ramp-up caused by up_wait_retry_interval pausing operations on first connection attempt

src/cluster_client.cpp

@@ -9,6 +9,7 @@
 #define PART_SENT 1
 #define PART_DONE 2
 #define PART_ERROR 4
+#define PART_RETRY 8
 #define CACHE_DIRTY 1
 #define CACHE_FLUSHING 2
 #define CACHE_REPEATING 3
@@ -670,6 +671,8 @@ resume_2:
             if (!try_send(op, i))
             {
                 // We'll need to retry again
+                if (op->parts[i].flags & PART_RETRY)
+                {
                     op->up_wait = true;
                     if (!retry_timeout_id)
                     {
@@ -679,6 +682,7 @@ resume_2:
                             continue_ops(true);
                         });
                     }
+                }
                 op->state = 2;
             }
         }
@@ -746,7 +750,7 @@ resume_3:
         {
             for (int i = 0; i < op->parts.size(); i++)
             {
-                op->parts[i].flags = 0;
+                op->parts[i].flags = PART_RETRY;
             }
             goto resume_2;
         }