Function clusterSendFail

app/redis-6.2.6/src/cluster.c:2751–2758

Send a FAIL message to all the nodes we are able to contact. * The FAIL message is sent when we detect that a node is failing * (CLUSTER_NODE_PFAIL) and we also receive a gossip confirmation of this: * we switch the node state to CLUSTER_NODE_FAIL and ask all the other * nodes to do the same ASAP. */

 * we switch the node state to CLUSTER_NODE_FAIL and ask all the other
 * nodes to do the same ASAP. */
void clusterSendFail(char *nodename) {
    clusterMsg buf[1];
    clusterMsg *hdr = (clusterMsg*) buf;

    clusterBuildMessageHdr(hdr,CLUSTERMSG_TYPE_FAIL);
    memcpy(hdr->data.fail.about.nodename,nodename,CLUSTER_NAMELEN);
    clusterBroadcastMessage(buf,ntohl(hdr->totlen));
}

/* Send an UPDATE message to the specified link carrying the specified 'node'
 * slots configuration. The node name, slots bitmap, and configEpoch info