Describe the bug when some node host is crash down ,the failed node cant del from cluster with redis-cli --cluster del-node ,version from 7.0.4 commit 888effe4beb2c0ac8de1c863e635e45af3d3b329 To reproduce
[root@localhost redis-cluster]# redis-cli -p 7000 cluster nodes
e99879144178ee4590fe92594ec24d4c7b1e1b05 172.168.224.131:7007@17007 slave 5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 0 1658304666449 8 connected
a0259db380d31f48df961682afc78ef6bb343984 172.168.224.131:7003@17003 master - 0 1658304666000 4 connected 12288-16383
abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 172.168.224.131:7002@17002 master - 0 1658304666000 3 connected 8192-12287
d6e8d97264c98146ebc46ca60d9af8923610eb78 172.168.224.131:7006@17006 slave ec467a35dab69bf18a734f1ee558bb20df992f01 0 1658304664410 7 connected
5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 172.168.224.131:7001@17001 master - 0 1658304666000 2 connected 4096-8191
36d7e2740c56ea80f0990777c77f355c5c0c7063 172.168.224.131:7004@17004 slave a0259db380d31f48df961682afc78ef6bb343984 0 1658304667474 5 connected
bb537444ac336abb269535adc9c6af61a403d7fe 172.168.224.131:7005@17005 slave abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 0 1658304668498 6 connected
ec467a35dab69bf18a734f1ee558bb20df992f01 172.168.224.131:7000@17000 myself,master - 0 1658304665000 1 connected 0-4095
[root@localhost redis-cluster]# ps -ef|grep redis
root 25974 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7000 [cluster]
root 25980 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7001 [cluster]
root 25986 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7002 [cluster]
root 25992 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7003 [cluster]
root 25998 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7004 [cluster]
root 26004 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7005 [cluster]
root 26009 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7006 [cluster]
root 26014 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7007 [cluster]
root 26019 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7008 [cluster]
root 26024 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7009 [cluster]
root 26040 14605 0 04:11 pts/0 00:00:00 grep --color=auto redis
[root@localhost redis-cluster]# kill 26014
[root@localhost redis-cluster]# !ps
ps -ef|grep redis
root 25974 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7000 [cluster]
root 25980 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7001 [cluster]
root 25986 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7002 [cluster]
root 25992 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7003 [cluster]
root 25998 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7004 [cluster]
root 26004 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7005 [cluster]
root 26009 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7006 [cluster]
root 26019 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7008 [cluster]
root 26024 1 0 04:10 ? 00:00:00 ../redis-server4 0.0.0.0:7009 [cluster]
root 26042 14605 0 04:11 pts/0 00:00:00 grep --color=auto redis
[root@localhost redis-cluster]# redis-cli -p 7000 cluster nodes
e99879144178ee4590fe92594ec24d4c7b1e1b05 172.168.224.131:7007@17007 slave 5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 1658304684532 1658304681767 8 disconnected
a0259db380d31f48df961682afc78ef6bb343984 172.168.224.131:7003@17003 master - 0 1658304697144 4 connected 12288-16383
abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 172.168.224.131:7002@17002 master - 0 1658304695000 3 connected 8192-12287
d6e8d97264c98146ebc46ca60d9af8923610eb78 172.168.224.131:7006@17006 slave ec467a35dab69bf18a734f1ee558bb20df992f01 0 1658304696000 7 connected
5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 172.168.224.131:7001@17001 master - 0 1658304697000 2 connected 4096-8191
36d7e2740c56ea80f0990777c77f355c5c0c7063 172.168.224.131:7004@17004 slave a0259db380d31f48df961682afc78ef6bb343984 0 1658304696119 5 connected
bb537444ac336abb269535adc9c6af61a403d7fe 172.168.224.131:7005@17005 slave abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 0 1658304698166 6 connected
ec467a35dab69bf18a734f1ee558bb20df992f01 172.168.224.131:7000@17000 myself,master - 0 1658304695000 1 connected 0-4095
[root@localhost redis-cluster]# redis-cli -p 7000 cluster nodes
e99879144178ee4590fe92594ec24d4c7b1e1b05 172.168.224.131:7007@17007 slave,fail 5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 1658304684532 1658304681767 8 disconnected
a0259db380d31f48df961682afc78ef6bb343984 172.168.224.131:7003@17003 master - 0 1658304701253 4 connected 12288-16383
abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 172.168.224.131:7002@17002 master - 0 1658304702281 3 connected 8192-12287
d6e8d97264c98146ebc46ca60d9af8923610eb78 172.168.224.131:7006@17006 slave ec467a35dab69bf18a734f1ee558bb20df992f01 0 1658304700000 7 connected
5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 172.168.224.131:7001@17001 master - 0 1658304700000 2 connected 4096-8191
36d7e2740c56ea80f0990777c77f355c5c0c7063 172.168.224.131:7004@17004 slave a0259db380d31f48df961682afc78ef6bb343984 0 1658304699000 5 connected
bb537444ac336abb269535adc9c6af61a403d7fe 172.168.224.131:7005@17005 slave abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 0 1658304700227 6 connected
ec467a35dab69bf18a734f1ee558bb20df992f01 172.168.224.131:7000@17000 myself,master - 0 1658304699000 1 connected 0-4095
[root@localhost redis-7.0.4]# src/redis-cli --cluster del-node 172.168.224.131:7000 e99879144178ee4590fe92594ec24d4c7b1e1b05
>>> Removing node e99879144178ee4590fe92594ec24d4c7b1e1b05 from cluster 172.168.224.131:7000
Could not connect to Redis at 172.168.224.131:7007: Connection refused
[ERR] No such node ID e99879144178ee4590fe92594ec24d4c7b1e1b05
[root@localhost redis-cluster]# redis-cli -p 7000 cluster nodes
e99879144178ee4590fe92594ec24d4c7b1e1b05 172.168.224.131:7007@17007 slave,fail 5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 1658304684532 1658304681767 8 disconnected
a0259db380d31f48df961682afc78ef6bb343984 172.168.224.131:7003@17003 master - 0 1658304701253 4 connected 12288-16383
abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 172.168.224.131:7002@17002 master - 0 1658304702281 3 connected 8192-12287
d6e8d97264c98146ebc46ca60d9af8923610eb78 172.168.224.131:7006@17006 slave ec467a35dab69bf18a734f1ee558bb20df992f01 0 1658304700000 7 connected
5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 172.168.224.131:7001@17001 master - 0 1658304700000 2 connected 4096-8191
36d7e2740c56ea80f0990777c77f355c5c0c7063 172.168.224.131:7004@17004 slave a0259db380d31f48df961682afc78ef6bb343984 0 1658304699000 5 connected
bb537444ac336abb269535adc9c6af61a403d7fe 172.168.224.131:7005@17005 slave abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 0 1658304700227 6 connected
ec467a35dab69bf18a734f1ee558bb20df992f01 172.168.224.131:7000@17000 myself,master - 0 1658304699000 1 connected 0-4095
it cant work well and when fix or check the cluster may crash the redis-cli command Expected behavior
redis-cli should work well and not crash ,like this
src/redis-cli --cluster del-node 172.168.224.131:7000 e99879144178ee4590fe92594ec24d4c7b1e1b05
>>> Removing node e99879144178ee4590fe92594ec24d4c7b1e1b05 from cluster 172.168.224.131:7000
Could not connect to Redis at 172.168.224.131:7007: Connection refused
>>> Sending CLUSTER FORGET messages to the cluster...
[root@localhost redis-cluster]# redis-cli -p 7000 cluster nodes
a0259db380d31f48df961682afc78ef6bb343984 172.168.224.131:7003@17003 master - 0 1658305482000 4 connected 12288-16383
abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 172.168.224.131:7002@17002 master - 0 1658305482017 3 connected 8192-12287
d6e8d97264c98146ebc46ca60d9af8923610eb78 172.168.224.131:7006@17006 slave ec467a35dab69bf18a734f1ee558bb20df992f01 0 1658305484053 7 connected
5cfab7e5d821d5390bab58f0b88db6a5ce4dad22 172.168.224.131:7001@17001 master - 0 1658305483036 2 connected 4096-8191
36d7e2740c56ea80f0990777c77f355c5c0c7063 172.168.224.131:7004@17004 slave a0259db380d31f48df961682afc78ef6bb343984 0 1658305482000 5 connected
bb537444ac336abb269535adc9c6af61a403d7fe 172.168.224.131:7005@17005 slave abbf31dbf414a2a73b36349ab6dc8bdcfdd84a45 0 1658305485075 6 connected
ec467a35dab69bf18a734f1ee558bb20df992f01 172.168.224.131:7000@17000 myself,master - 0 1658305482000 1 connected 0-4095
Additional information
Comment From: heyone-top
my fix https://github.com/heyone-top/redis/commit/d97881822ec61d93f96d2e483a990a36040840df