func (c *ClusterClient) execClusterCmds(
cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
) (map[*clusterNode][]Cmder, error) {
if err := writeCmd(cn, cmds...); err != nil {
setCmdsErr(cmds, err)
return failedCmds, err
}
var retErr error
setRetErr := func(err error) {
if retErr == nil {
retErr = err
}
}
for i, cmd := range cmds {
err := cmd.readReply(cn)
if err == nil {
continue
}
if errors.IsNetwork(err) {
cmd.reset()
failedCmds[nil] = append(failedCmds[nil], cmds[i:]...)
break
} else if moved, ask, addr := errors.IsMoved(err); moved {
c.lazyReloadSlots()
cmd.reset()
node, err := c.nodeByAddr(addr)
if err != nil {
setRetErr(err)
continue
}
failedCmds[node] = append(failedCmds[node], cmd)
} else if ask {
cmd.reset()
node, err := c.nodeByAddr(addr)
if err != nil {
setRetErr(err)
continue
}
failedCmds[node] = append(failedCmds[node], NewCmd("ASKING"), cmd)
} else {
setRetErr(err)
}
}
return failedCmds, retErr
}
func (c *PubSub) receiveMessage(timeout time.Duration) (*Message, error) {
var errNum uint
for {
msgi, err := c.ReceiveTimeout(timeout)
if err != nil {
if !errors.IsNetwork(err) {
return nil, err
}
errNum++
if errNum < 3 {
if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
err := c.Ping("")
if err != nil {
internal.Logf("PubSub.Ping failed: %s", err)
}
}
} else {
// 3 consequent errors - connection is bad
// and/or Redis Server is down.
// Sleep to not exceed max number of open connections.
time.Sleep(time.Second)
}
continue
}
// Reset error number, because we received a message.
errNum = 0
switch msg := msgi.(type) {
case *Subscription:
// Ignore.
case *Pong:
// Ignore.
case *Message:
return msg, nil
default:
return nil, fmt.Errorf("redis: unknown message: %T", msgi)
}
}
}