Create CMX nodes sequentially (#2184)

Author: sgalsaleh

e2e/cluster/cmx/cluster.go

@@ -14,7 +14,6 @@ import (
 	"time"
 
 	"github.com/google/uuid"
-	"golang.org/x/sync/errgroup"
 )
 
 type ClusterInput struct {
@@ -59,27 +58,13 @@ func NewCluster(in *ClusterInput) *Cluster {
 	}
 	c.network = network
 
-	g := new(errgroup.Group)
-	var mu sync.Mutex
-
 	for i := range c.Nodes {
-		func(i int) {
-			g.Go(func() error {
-				node, err := NewNode(in, i, network.ID)
-				if err != nil {
-					return fmt.Errorf("create node %d: %w", i, err)
-				}
-				in.T.Logf("node%d created with ID %s", i, node.ID)
-				mu.Lock()
-				c.Nodes[i] = *node
-				mu.Unlock()
-				return nil
-			})
-		}(i)
-	}
-
-	if err := g.Wait(); err != nil {
-		in.T.Fatalf("failed to create nodes: %v", err)
+		node, err := NewNode(in, i, network.ID)
+		if err != nil {
+			in.T.Fatalf("create node %d: %v", i, err)
+		}
+		in.T.Logf("node%d created with ID %s", i, node.ID)
+		c.Nodes[i] = *node
 	}
 
 	return c