Redis Cluster: How to remove a machine?

A machine has been hung up, and can not reboot, with two nodes. del-node do not work, after FORGET, the state becomes handshake, how to remove the two nodes in the machine from cluster?

the nodeid change every few seconds if the state of node is handshake.

maybe because the nodeis changed, send CLUSTER FORGET failed.

Comment From: yhsmy

how did you solve this problem?