// refreshBy retries refreshing the node key until the deadline is reached.
func (ec *EtcdCoordinator) refreshBy(c *etcd.Client, deadline time.Time) (err error) {
for time.Now().Before(deadline) {
// Make sure we shouldn't exit
select {
case <-ec.stop:
return err
default:
}
_, err = c.UpdateDir(ec.nodePath, ec.conf.NodeTTL)
if err == nil {
// It worked!
return nil
}
metafora.Warnf("Unexpected error updating node key: %v", err)
transport.CloseIdleConnections() // paranoia; let's get fresh connections on errors.
time.Sleep(500 * time.Millisecond) // rate limit retries a bit
}
// Didn't get a successful response before deadline, exit with error
return err
}