make-cluster command random failures

[bsergean]

with this error:

2020-07-17 16:18:46 ERROR cluster_nodes error: ERR Unknown node 566f9c51750a6eabbceba86ad09052b03d8021ef

We should display the full backtrace when this happens.

[bsergean]

other problem, we create the cluster before finishing to check that all port are opened

2020-07-18T00:44:23.8106610Z 4/6 Wait for the cluster nodes to be running
2020-07-18T00:44:23.8107920Z ......
2020-07-18T00:44:23.8143080Z Checking redis://localhost:5000 .
2020-07-18T00:44:23.8170640Z Checking redis://localhost:5001 .
2020-07-18T00:44:23.8196280Z Checking redis://localhost:5002 .
2020-07-18T00:44:23.8221310Z Checking redis://localhost:5003 .
2020-07-18T00:44:23.8246170Z Checking redis://localhost:5004 .
2020-07-18T00:44:23.8271290Z 5/6 Create the cluster
2020-07-18T00:44:23.8271510Z >>> Performing hash slots allocation on 3 nodes...
2020-07-18T00:44:24.4186210Z Master[0] -> Slotes 0 - 5460
2020-07-18T00:44:24.4186840Z Master[1] -> Slotes 5461 - 10921
2020-07-18T00:44:24.4187290Z Master[2] -> Slotes 10922 - 16383
2020-07-18T00:44:24.4187520Z >>> Assign a different config epoch to each node
2020-07-18T00:44:24.4197850Z 1367:M 18 Jul 2020 00:44:24.419 # configEpoch set to 1 via CLUSTER SET-CONFIG-EPOCH
2020-07-18T00:44:24.6240140Z 1368:M 18 Jul 2020 00:44:24.623 # configEpoch set to 2 via CLUSTER SET-CONFIG-EPOCH
2020-07-18T00:44:24.8274250Z 1369:M 18 Jul 2020 00:44:24.827 # configEpoch set to 3 via CLUSTER SET-CONFIG-EPOCH
2020-07-18T00:44:25.0291640Z 1370:M 18 Jul 2020 00:44:25.028 # configEpoch set to 4 via CLUSTER SET-CONFIG-EPOCH
2020-07-18T00:44:25.2306490Z 1371:M 18 Jul 2020 00:44:25.230 # configEpoch set to 5 via CLUSTER SET-CONFIG-EPOCH
2020-07-18T00:44:25.3524370Z 1372:M 18 Jul 2020 00:44:25.352 # configEpoch set to 6 via CLUSTER SET-CONFIG-EPOCH
2020-07-18T00:44:25.5533570Z >>> Sending CLUSTER MEET messages to join the cluster
2020-07-18T00:44:25.5941480Z 1367:M 18 Jul 2020 00:44:25.593 # IP address for this node updated to 127.0.0.1
2020-07-18T00:44:26.0403840Z 1369:M 18 Jul 2020 00:44:26.040 # IP address for this node updated to 127.0.0.1
2020-07-18T00:44:26.0804300Z 1371:M 18 Jul 2020 00:44:26.080 # IP address for this node updated to 127.0.0.1
2020-07-18T00:44:26.2836630Z 1370:M 18 Jul 2020 00:44:26.283 # IP address for this node updated to 127.0.0.1
2020-07-18T00:44:26.3641650Z 1368:M 18 Jul 2020 00:44:26.364 # IP address for this node updated to 127.0.0.1
2020-07-18T00:44:26.4448500Z 1372:M 18 Jul 2020 00:44:26.444 # IP address for this node updated to 127.0.0.1
2020-07-18T00:44:26.8888070Z Checking redis://localhost:5005 .
2020-07-18T00:44:27.4681500Z >>> Assigning replicas