func (c *Client) watchLeader() {
var (
conn zkhelper.Conn
err error
)
for {
conn, err = zkhelper.ConnectToZkWithTimeout(c.conf.ZKAddr, time.Second)
if err != nil {
log.Errorf("connect zk err %v, retry later", err)
time.Sleep(3 * time.Second)
continue
}
break
}
defer conn.Close()
var lastAddr string
for {
addr, watcher, err := util.GetWatchLeader(conn, c.conf.RootPath)
if err != nil {
log.Errorf("get tso leader err %v, retry later", err)
time.Sleep(3 * time.Second)
continue
}
if lastAddr != addr {
log.Warnf("leader change %s -> %s", lastAddr, addr)
lastAddr = addr
c.leaderCh <- addr
}
// watch the leader changes.
<-watcher
}
}