code: func (a *Agent) remoteExecGetSpec(event *remoteExecEvent, spec *remoteExecSpec) bool {
  	get := structs.KeyRequest{
  		Datacenter: a.config.Datacenter,
  		Key:        path.Join(event.Prefix, event.Session, remoteExecFileName),
  		QueryOptions: structs.QueryOptions{
  			AllowStale: true, // Stale read for scale! Retry on failure.
  		},
  	}
  	get.Token = a.tokens.AgentToken()
  	var out structs.IndexedDirEntries
  QUERY:
  	if err := a.RPC("KVS.Get", &get, &out); err != nil {
  		a.logger.Printf("[ERR] agent: failed to get remote exec job: %v", err)
  		return false
  	}
  	if len(out.Entries) == 0 {
  		// If the initial read was stale and had no data, retry as a consistent read
  		if get.QueryOptions.AllowStale {
  			a.logger.Printf("[DEBUG] agent: trying consistent fetch of remote exec job spec")
  			get.QueryOptions.AllowStale = false
  			goto QUERY
  		} else {
  			a.logger.Printf("[DEBUG] agent: remote exec aborted, job spec missing")
  			return false
  		}
  	}
  	if err := json.Unmarshal(out.Entries[0].Value, &spec); err != nil {
  		a.logger.Printf("[ERR] agent: failed to decode remote exec spec: %v", err)
  		return false
  	}
  	return true
  }
docs: // remoteExecGetSpec is used to get the exec specification.
  // Returns if execution should continue