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156 lines
4.3 KiB
156 lines
4.3 KiB
package consensus
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import (
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"errors"
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"fmt"
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"io"
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"reflect"
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"strconv"
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"strings"
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"time"
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auto "github.com/tendermint/go-autofile"
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. "github.com/tendermint/go-common"
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"github.com/tendermint/go-wire"
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"github.com/tendermint/tendermint/types"
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)
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// Unmarshal and apply a single message to the consensus state
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// as if it were received in receiveRoutine
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// Lines that start with "#" are ignored.
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// NOTE: receiveRoutine should not be running
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func (cs *ConsensusState) readReplayMessage(msgBytes []byte, newStepCh chan interface{}) error {
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// Skip over empty and meta lines
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if len(msgBytes) == 0 || msgBytes[0] == '#' {
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return nil
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}
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var err error
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var msg TimedWALMessage
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wire.ReadJSON(&msg, msgBytes, &err)
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if err != nil {
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fmt.Println("MsgBytes:", msgBytes, string(msgBytes))
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return fmt.Errorf("Error reading json data: %v", err)
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}
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// for logging
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switch m := msg.Msg.(type) {
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case types.EventDataRoundState:
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log.Notice("Replay: New Step", "height", m.Height, "round", m.Round, "step", m.Step)
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// these are playback checks
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ticker := time.After(time.Second * 2)
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if newStepCh != nil {
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select {
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case mi := <-newStepCh:
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m2 := mi.(types.EventDataRoundState)
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if m.Height != m2.Height || m.Round != m2.Round || m.Step != m2.Step {
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return fmt.Errorf("RoundState mismatch. Got %v; Expected %v", m2, m)
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}
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case <-ticker:
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return fmt.Errorf("Failed to read off newStepCh")
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}
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}
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case msgInfo:
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peerKey := m.PeerKey
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if peerKey == "" {
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peerKey = "local"
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}
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switch msg := m.Msg.(type) {
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case *ProposalMessage:
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p := msg.Proposal
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log.Notice("Replay: Proposal", "height", p.Height, "round", p.Round, "header",
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p.BlockPartsHeader, "pol", p.POLRound, "peer", peerKey)
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case *BlockPartMessage:
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log.Notice("Replay: BlockPart", "height", msg.Height, "round", msg.Round, "peer", peerKey)
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case *VoteMessage:
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v := msg.Vote
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log.Notice("Replay: Vote", "height", v.Height, "round", v.Round, "type", v.Type,
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"blockID", v.BlockID, "peer", peerKey)
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}
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cs.handleMsg(m, cs.RoundState)
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case timeoutInfo:
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log.Notice("Replay: Timeout", "height", m.Height, "round", m.Round, "step", m.Step, "dur", m.Duration)
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cs.handleTimeout(m, cs.RoundState)
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default:
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return fmt.Errorf("Replay: Unknown TimedWALMessage type: %v", reflect.TypeOf(msg.Msg))
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}
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return nil
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}
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// replay only those messages since the last block.
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// timeoutRoutine should run concurrently to read off tickChan
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func (cs *ConsensusState) catchupReplay(csHeight int) error {
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// set replayMode
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cs.replayMode = true
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defer func() { cs.replayMode = false }()
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// Ensure that height+1 doesn't exist
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gr, found, err := cs.wal.group.Search("#HEIGHT: ", makeHeightSearchFunc(csHeight+1))
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if found {
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return errors.New(Fmt("WAL should not contain height %d.", csHeight+1))
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}
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if gr != nil {
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gr.Close()
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}
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// Search for height marker
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gr, found, err = cs.wal.group.Search("#HEIGHT: ", makeHeightSearchFunc(csHeight))
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if err == io.EOF {
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log.Warn("Replay: wal.group.Search returned EOF", "height", csHeight)
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return nil
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} else if err != nil {
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return err
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}
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if !found {
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return errors.New(Fmt("WAL does not contain height %d.", csHeight))
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}
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defer gr.Close()
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log.Notice("Catchup by replaying consensus messages", "height", csHeight)
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for {
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line, err := gr.ReadLine()
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if err != nil {
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if err == io.EOF {
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break
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} else {
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return err
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}
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}
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// NOTE: since the priv key is set when the msgs are received
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// it will attempt to eg double sign but we can just ignore it
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// since the votes will be replayed and we'll get to the next step
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if err := cs.readReplayMessage([]byte(line), nil); err != nil {
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return err
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}
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}
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log.Notice("Replay: Done")
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return nil
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}
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//--------------------------------------------------------------------------------
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// Parses marker lines of the form:
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// #HEIGHT: 12345
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func makeHeightSearchFunc(height int) auto.SearchFunc {
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return func(line string) (int, error) {
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line = strings.TrimRight(line, "\n")
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parts := strings.Split(line, " ")
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if len(parts) != 2 {
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return -1, errors.New("Line did not have 2 parts")
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}
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i, err := strconv.Atoi(parts[1])
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if err != nil {
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return -1, errors.New("Failed to parse INFO: " + err.Error())
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}
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if height < i {
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return 1, nil
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} else if height == i {
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return 0, nil
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} else {
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return -1, nil
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}
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}
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}
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