/
stream_reader.go
1461 lines (1166 loc) · 44.1 KB
/
stream_reader.go
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// Copyright (c) 2014 Couchbase, Inc.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
package indexer
import (
"errors"
"fmt"
"sync/atomic"
"time"
"sync"
"github.com/couchbase/indexing/secondary/common"
"github.com/couchbase/indexing/secondary/dataport"
"github.com/couchbase/indexing/secondary/logging"
protobuf "github.com/couchbase/indexing/secondary/protobuf/data"
Stats "github.com/couchbase/indexing/secondary/stats"
)
//MutationStreamReader reads a Dataport and stores the incoming mutations
//in mutation queue. This is the only component writing to a mutation queue.
type MutationStreamReader interface {
Shutdown()
}
type mutationStreamReader struct {
mutationCount uint64
syncBatchInterval uint64 //batch interval for sync message
stream *dataport.Server //handle to the Dataport server
streamId common.StreamId
streamMutch chan interface{} //Dataport channel
supvCmdch MsgChannel //supervisor sends commands on this channel
supvRespch MsgChannel //channel to send any message to supervisor
syncStopCh StopChannel
keyspaceIdQueueMap KeyspaceIdQueueMap //keyspaceId to mutation queue map
keyspaceIdEnableOSO KeyspaceIdEnableOSO
killch chan bool // kill chan for the main loop
stats IndexerStatsHolder
indexerState common.IndexerState
stateLock sync.RWMutex
queueMapLock sync.RWMutex
stopch StopChannel
numWorkers int // number of workers to process mutation stream
streamWorkers []*streamWorker
config common.Config
}
//CreateMutationStreamReader creates a new mutation stream and starts
//a reader to listen and process the mutations.
//In case returned MutationStreamReader is nil, Message will have the error msg.
func CreateMutationStreamReader(streamId common.StreamId, keyspaceIdQueueMap KeyspaceIdQueueMap,
keyspaceIdFilter map[string]*common.TsVbuuid, supvCmdch MsgChannel, supvRespch MsgChannel,
numWorkers int, stats *IndexerStats, config common.Config, is common.IndexerState,
allowMarkFirstSnap bool, vbMap *VbMapHolder, keyspaceIdSessionId KeyspaceIdSessionId,
keyspaceIdEnableOSO KeyspaceIdEnableOSO) (
MutationStreamReader, Message) {
//start a new mutation stream
streamMutch := make(chan interface{}, getMutationBufferSize(config))
dpconf := config.SectionConfig(
"dataport.", true /*trim*/)
dpconf = overrideDataportConf(dpconf)
stream, err := dataport.NewServer(
string(StreamAddrMap[streamId]),
common.SystemConfig["maxVbuckets"].Int(),
dpconf, streamMutch)
if err != nil {
//return stream init error
logging.Fatalf("MutationStreamReader: Error returned from NewServer."+
"StreamId: %v, Err: %v", streamId, err)
msgErr := &MsgError{
err: Error{code: ERROR_STREAM_INIT,
severity: FATAL,
category: STREAM_READER,
cause: err}}
return nil, msgErr
}
//init the reader
r := &mutationStreamReader{streamId: streamId,
stream: stream,
streamMutch: streamMutch,
supvCmdch: supvCmdch,
supvRespch: supvRespch,
syncStopCh: make(StopChannel),
keyspaceIdQueueMap: CopyKeyspaceIdQueueMap(keyspaceIdQueueMap),
keyspaceIdEnableOSO: make(KeyspaceIdEnableOSO),
killch: make(chan bool),
syncBatchInterval: getSyncBatchInterval(config),
stopch: make(StopChannel),
streamWorkers: make([]*streamWorker, numWorkers),
numWorkers: numWorkers,
config: config,
}
for ks, enable := range keyspaceIdEnableOSO {
r.keyspaceIdEnableOSO[ks] = enable
}
r.stats.Set(stats)
logging.Infof("MutationStreamReader: Setting Stream Workers %v %v", r.streamId, numWorkers)
for i := 0; i < numWorkers; i++ {
r.streamWorkers[i] = newStreamWorker(streamId, numWorkers, i, config, r,
keyspaceIdFilter, allowMarkFirstSnap, vbMap, keyspaceIdSessionId, keyspaceIdEnableOSO)
go r.streamWorkers[i].start()
}
r.indexerState = is
//start the main reader loop
go r.run()
go r.listenSupvCmd()
go r.syncWorker()
return r, &MsgSuccess{}
}
//Shutdown shuts down the mutation stream and all workers.
//This call doesn't return till shutdown is complete.
func (r *mutationStreamReader) Shutdown() {
logging.Infof("MutationStreamReader:Shutdown StreamReader %v", r.streamId)
close(r.killch)
for i := 0; i < r.numWorkers; i++ {
close(r.streamWorkers[i].workerStopCh)
}
//stop sync worker
close(r.syncStopCh)
close(r.stopch)
//close the mutation stream
r.stream.Close()
}
//run starts the stream reader loop which listens to message from
//mutation stream
func (r *mutationStreamReader) run() {
//panic handler
defer r.panicHandler()
for {
select {
case msg, ok := <-r.streamMutch:
if ok {
switch msg.(type) {
case []*protobuf.VbKeyVersions:
vbKeyVer := msg.([]*protobuf.VbKeyVersions)
r.handleVbKeyVersions(vbKeyVer)
default:
r.handleStreamInfoMsg(msg)
}
} else {
//stream library has closed this channel indicating
//unexpected stream closure send the message to supervisor
logging.Fatalf("MutationStreamReader::run Unexpected Mutation "+
"Channel Close for Stream %v", r.streamId)
msgErr := &MsgError{
err: Error{code: ERROR_STREAM_READER_STREAM_SHUTDOWN,
severity: FATAL,
category: STREAM_READER}}
r.supvRespch <- msgErr
}
case <-r.killch:
return
}
}
}
//run starts the stream reader loop which listens to message from
//the supervisor
func (r *mutationStreamReader) listenSupvCmd() {
//panic handler
defer r.panicHandler()
for {
cmd, ok := <-r.supvCmdch
if ok {
//handle commands from supervisor
if cmd.GetMsgType() == STREAM_READER_SHUTDOWN {
//shutdown and exit the stream reader loop
r.Shutdown()
r.supvCmdch <- &MsgSuccess{}
return
}
msg := r.handleSupervisorCommands(cmd)
r.supvCmdch <- msg
} else {
//supervisor channel closed. Shutdown stream reader.
r.Shutdown()
return
}
}
}
func (r *mutationStreamReader) handleVbKeyVersions(vbKeyVers []*protobuf.VbKeyVersions) {
for _, vb := range vbKeyVers {
r.streamWorkers[int(vb.GetVbucket())%r.numWorkers].workerch <- vb
}
}
//handleStreamInfoMsg handles the error messages from Dataport
func (r *mutationStreamReader) handleStreamInfoMsg(msg interface{}) {
var supvMsg Message
switch msg.(type) {
case dataport.ConnectionError:
logging.Infof("MutationStreamReader::handleStreamInfoMsg \n\tReceived ConnectionError "+
"from Client for Stream %v %v.", r.streamId, msg.(dataport.ConnectionError))
//send a separate message for each keyspaceId. If the ConnError is with empty vblist,
//the message is ignored.
connErr := msg.(dataport.ConnectionError)
if len(connErr) != 0 {
for keyspaceId, vbList := range connErr {
supvMsg = &MsgStreamInfo{mType: STREAM_READER_CONN_ERROR,
streamId: r.streamId,
keyspaceId: keyspaceId,
vbList: copyVbList(vbList),
}
r.supvRespch <- supvMsg
}
} else {
supvMsg = &MsgStreamInfo{mType: STREAM_READER_CONN_ERROR,
streamId: r.streamId,
keyspaceId: "",
vbList: []Vbucket(nil),
}
r.supvRespch <- supvMsg
}
default:
logging.Fatalf("MutationStreamReader::handleStreamError \n\tReceived Unknown Message "+
"from Client for Stream %v.", r.streamId)
supvMsg = &MsgError{
err: Error{code: ERROR_STREAM_READER_UNKNOWN_ERROR,
severity: FATAL,
category: STREAM_READER}}
r.supvRespch <- supvMsg
}
}
//handleSupervisorCommands handles the messages from Supervisor
func (r *mutationStreamReader) handleSupervisorCommands(cmd Message) Message {
switch cmd.GetMsgType() {
case STREAM_READER_UPDATE_QUEUE_MAP:
logging.Infof("MutationStreamReader::handleSupervisorCommands %v", cmd)
close(r.stopch)
r.queueMapLock.Lock()
defer r.queueMapLock.Unlock()
//copy and store new keyspaceIdQueueMap
req := cmd.(*MsgUpdateKeyspaceIdQueue)
keyspaceIdQueueMap := req.GetKeyspaceIdQueueMap()
r.keyspaceIdQueueMap = CopyKeyspaceIdQueueMap(keyspaceIdQueueMap)
r.stats.Set(req.GetStatsObject())
keyspaceIdFilter := req.GetKeyspaceIdFilter()
keyspaceIdSessionId := req.GetKeyspaceIdSessionId()
keyspaceIdEnableOSO := req.GetKeyspaceIdEnableOSO()
for ks, enable := range keyspaceIdEnableOSO {
r.keyspaceIdEnableOSO[ks] = enable
}
for i := 0; i < r.numWorkers; i++ {
r.streamWorkers[i].initKeyspaceIdFilter(keyspaceIdFilter,
keyspaceIdSessionId, keyspaceIdEnableOSO)
}
r.stopch = make(StopChannel)
return &MsgSuccess{}
case INDEXER_PAUSE:
logging.Infof("MutationStreamReader::handleIndexerPause")
r.setIndexerState(common.INDEXER_PAUSED)
return &MsgSuccess{}
case INDEXER_SECURITY_CHANGE:
logging.Infof("MutationStreamReader::handleSecurityChange")
if err := r.stream.ResetConnections(); err != nil {
idxErr := Error{
code: ERROR_INDEXER_INTERNAL_ERROR,
severity: FATAL,
cause: err,
category: INDEXER,
}
return &MsgError{err: idxErr}
}
return &MsgSuccess{}
case UPDATE_KEYSPACE_STATS_MAP:
logging.Infof("MutationStreamReader::handleUpdateKeyspaceStatsMap")
req := cmd.(*MsgUpdateKeyspaceStatsMap)
stats := r.stats.Get()
if stats != nil {
stats.keyspaceStatsMap.Set(req.GetStatsObject())
}
return &MsgSuccess{}
default:
logging.Errorf("MutationStreamReader::handleSupervisorCommands Received Unknown Command %v", cmd)
return &MsgError{
err: Error{code: ERROR_STREAM_READER_UNKNOWN_COMMAND,
severity: NORMAL,
category: STREAM_READER}}
}
}
//panicHandler handles the panic from underlying stream library
func (r *mutationStreamReader) panicHandler() {
//panic recovery
if rc := recover(); rc != nil {
logging.Fatalf("MutationStreamReader::panicHandler Received Panic for Stream %v", r.streamId)
var err error
switch x := rc.(type) {
case string:
err = errors.New(x)
case error:
err = x
default:
err = errors.New("Unknown panic")
}
logging.Fatalf("StreamReader Panic Err %v", err)
logging.Fatalf("%s", logging.StackTrace())
//panic from stream library, propagate to supervisor
msg := &MsgStreamError{streamId: r.streamId,
err: Error{code: ERROR_STREAM_READER_PANIC,
severity: FATAL,
category: STREAM_READER,
cause: err}}
r.supvRespch <- msg
}
}
func (r *mutationStreamReader) syncWorker() {
ticker := time.NewTicker(time.Millisecond * time.Duration(r.syncBatchInterval))
fastpath := true
inactivityTick := 0
for {
select {
case <-ticker.C:
if r.maybeSendSync(fastpath) {
inactivityTick = 0
fastpath = true
} else {
if inactivityTick > int(r.syncBatchInterval)*r.numWorkers {
fastpath = false
} else {
inactivityTick++
}
}
case <-r.syncStopCh:
ticker.Stop()
return
}
}
}
//send a sync message if its due
func (r *mutationStreamReader) maybeSendSync(fastpath bool) bool {
if !fastpath {
if !r.checkAnySyncDue() {
return false
}
}
hwt := make(map[string]*common.TsVbuuid)
prevSnap := make(map[string]*common.TsVbuuid)
numVbuckets := r.config["numVbuckets"].Int()
var hwtOSOMap map[string]*common.TsVbuuid
var hwtOSO *common.TsVbuuid
sent := false
r.queueMapLock.RLock()
for keyspaceId := range r.keyspaceIdQueueMap {
//actual TS uses bucket as keyspaceId
hwt[keyspaceId] = common.NewTsVbuuidCached(GetBucketFromKeyspaceId(keyspaceId), numVbuckets)
prevSnap[keyspaceId] = common.NewTsVbuuidCached(GetBucketFromKeyspaceId(keyspaceId), numVbuckets)
if r.keyspaceIdEnableOSO[keyspaceId] {
if hwtOSOMap == nil {
hwtOSOMap = make(map[string]*common.TsVbuuid)
}
hwtOSOMap[keyspaceId] = common.NewTsVbuuidCached(GetBucketFromKeyspaceId(keyspaceId), numVbuckets)
}
}
nWrkr := r.numWorkers
for keyspaceId := range hwt {
needSync := false
hasOSO := false
enableOSO := false
sessionId := uint64(0)
for i := 0; i < nWrkr; i++ {
r.streamWorkers[i].lock.Lock()
if r.streamWorkers[i].keyspaceIdSyncDue[keyspaceId] {
needSync = true
}
if r.streamWorkers[i].keyspaceIdEnableOSO[keyspaceId] {
enableOSO = true
}
//all workers have same sessionId, it is ok to overwrite
sessionId = r.streamWorkers[i].keyspaceIdSessionId[keyspaceId]
loopCnt := 0
vb := 0
for {
vb = loopCnt*nWrkr + i
if vb < numVbuckets {
filter := r.streamWorkers[i].keyspaceIdFilter[keyspaceId]
filterOSO := r.streamWorkers[i].keyspaceIdFilterOSO[keyspaceId]
//if OSO snapshot
if enableOSO &&
filterOSO.Snapshots[vb][0] == 1 {
hwtOSOMap[keyspaceId].Seqnos[vb] = filterOSO.Seqnos[vb]
hwtOSOMap[keyspaceId].Vbuuids[vb] = filterOSO.Vbuuids[vb]
hwtOSOMap[keyspaceId].Snapshots[vb][0] = filterOSO.Snapshots[vb][0]
hwtOSOMap[keyspaceId].Snapshots[vb][1] = filterOSO.Snapshots[vb][1]
hasOSO = true
}
//regular snapshot
hwt[keyspaceId].Seqnos[vb] = filter.Seqnos[vb]
hwt[keyspaceId].Vbuuids[vb] = filter.Vbuuids[vb]
hwt[keyspaceId].Snapshots[vb] = filter.Snapshots[vb]
prevSnapMap := r.streamWorkers[i].keyspaceIdPrevSnapMap[keyspaceId]
prevSnap[keyspaceId].Seqnos[vb] = prevSnapMap.Seqnos[vb]
prevSnap[keyspaceId].Vbuuids[vb] = prevSnapMap.Vbuuids[vb]
prevSnap[keyspaceId].Snapshots[vb][0] = prevSnapMap.Snapshots[vb][0]
prevSnap[keyspaceId].Snapshots[vb][1] = prevSnapMap.Snapshots[vb][1]
if !hwt[keyspaceId].DisableAlign {
hwt[keyspaceId].DisableAlign = filter.DisableAlign
}
} else {
break
}
loopCnt++
}
r.streamWorkers[i].keyspaceIdSyncDue[keyspaceId] = false
r.streamWorkers[i].keyspaceIdFilter[keyspaceId].DisableAlign = false
r.streamWorkers[i].lock.Unlock()
}
if hasOSO && hwtOSOMap != nil {
hwtOSO = hwtOSOMap[keyspaceId]
}
if needSync {
r.supvRespch <- &MsgKeyspaceHWT{mType: STREAM_READER_HWT,
streamId: r.streamId,
keyspaceId: keyspaceId,
hwt: hwt[keyspaceId],
hwtOSO: hwtOSO,
prevSnap: prevSnap[keyspaceId],
sessionId: sessionId,
}
sent = true
}
}
r.queueMapLock.RUnlock()
return sent
}
//check if any worker has sync due
func (r *mutationStreamReader) checkAnySyncDue() bool {
syncDue := false
r.queueMapLock.RLock()
loop:
for keyspaceId := range r.keyspaceIdQueueMap {
for i := 0; i < r.numWorkers; i++ {
r.streamWorkers[i].lock.Lock()
if r.streamWorkers[i].keyspaceIdSyncDue[keyspaceId] {
syncDue = true
}
r.streamWorkers[i].lock.Unlock()
if syncDue {
break loop
}
}
}
r.queueMapLock.RUnlock()
return syncDue
}
func (r *mutationStreamReader) logReaderStat() {
atomic.AddUint64(&r.mutationCount, 1)
c := atomic.LoadUint64(&r.mutationCount)
if (c%10000 == 0) || c == 1 {
logging.Debugf("logReaderStat:: %v "+
"MutationCount %v", r.streamId, c)
}
}
func (r *mutationStreamReader) getIndexerState() common.IndexerState {
r.stateLock.RLock()
defer r.stateLock.RUnlock()
return r.indexerState
}
func (r *mutationStreamReader) setIndexerState(is common.IndexerState) {
r.stateLock.Lock()
defer r.stateLock.Unlock()
r.indexerState = is
}
//Stream Worker
type firstSnapFlag []bool
type streamWorker struct {
workerch chan *protobuf.VbKeyVersions //buffered channel for each worker
workerStopCh StopChannel //stop channels of workers
keyspaceIdFilter map[string]*common.TsVbuuid
keyspaceIdFilterOSO map[string]*common.TsVbuuid
keyspaceIdSessionId KeyspaceIdSessionId
keyspaceIdEnableOSO KeyspaceIdEnableOSO
keyspaceIdOSOException map[string]bool
keyspaceIdPrevSnapMap map[string]*common.TsVbuuid
keyspaceIdSyncDue map[string]bool
lock sync.RWMutex
//local variables
skipMutation bool
evalFilter bool
snapType uint32
snapStart uint64
snapEnd uint64
workerId int
streamId common.StreamId
reader *mutationStreamReader
meta *MutationMeta
markFirstSnap bool
keyspaceIdFirstSnap map[string]firstSnapFlag
vbMap *VbMapHolder
}
func newStreamWorker(streamId common.StreamId, numWorkers int, workerId int, config common.Config,
reader *mutationStreamReader, keyspaceIdFilter map[string]*common.TsVbuuid, allowMarkFirstSnap bool,
vbMap *VbMapHolder, keyspaceIdSessionId KeyspaceIdSessionId, keyspaceIdEnableOSO KeyspaceIdEnableOSO) *streamWorker {
w := &streamWorker{streamId: streamId,
workerId: workerId,
workerch: make(chan *protobuf.VbKeyVersions, getWorkerBufferSize(config)/uint64(numWorkers)),
workerStopCh: make(StopChannel),
keyspaceIdFilter: make(map[string]*common.TsVbuuid),
keyspaceIdFilterOSO: make(map[string]*common.TsVbuuid),
keyspaceIdPrevSnapMap: make(map[string]*common.TsVbuuid),
keyspaceIdSyncDue: make(map[string]bool),
reader: reader,
keyspaceIdFirstSnap: make(map[string]firstSnapFlag),
vbMap: vbMap,
keyspaceIdSessionId: make(KeyspaceIdSessionId),
keyspaceIdEnableOSO: make(KeyspaceIdEnableOSO),
keyspaceIdOSOException: make(map[string]bool),
}
w.meta = &MutationMeta{}
if allowMarkFirstSnap {
w.markFirstSnap = getMarkFirstSnap(config)
}
w.initKeyspaceIdFilter(keyspaceIdFilter, keyspaceIdSessionId, keyspaceIdEnableOSO)
return w
}
func (w *streamWorker) start() {
defer w.reader.panicHandler()
for {
select {
case vb := <-w.workerch:
w.handleKeyVersions(vb.GetKeyspaceId(), Vbucket(vb.GetVbucket()),
Vbuuid(vb.GetVbuuid()), vb.GetOpaque2(), vb.GetKvs(),
common.ProjectorVersion(vb.GetProjVer()))
case <-w.workerStopCh:
return
}
}
}
func (w *streamWorker) handleKeyVersions(keyspaceId string, vbucket Vbucket, vbuuid Vbuuid,
opaque uint64, kvs []*protobuf.KeyVersions, projVer common.ProjectorVersion) {
for _, kv := range kvs {
w.handleSingleKeyVersion(keyspaceId, vbucket, vbuuid, opaque, kv, projVer)
if kv.GetPrjMovingAvg() > 0 {
avg := w.getLatencyObj(keyspaceId, vbucket)
if avg != nil {
avg.Set(kv.GetPrjMovingAvg())
}
}
}
}
//handleSingleKeyVersion processes a single mutation based on the command type
//A mutation is put in a worker queue and control message is sent to supervisor
func (w *streamWorker) handleSingleKeyVersion(keyspaceId string, vbucket Vbucket, vbuuid Vbuuid,
opaque uint64, kv *protobuf.KeyVersions, projVer common.ProjectorVersion) {
meta := w.meta
meta.keyspaceId = keyspaceId
meta.vbucket = vbucket
meta.vbuuid = vbuuid
meta.seqno = kv.GetSeqno()
meta.projVer = projVer
meta.opaque = opaque
defer meta.Reset()
var mutk *MutationKeys
w.skipMutation = false
w.evalFilter = true
logging.LazyTrace(func() string {
return fmt.Sprintf("MutationStreamReader::handleSingleKeyVersion received KeyVersions %v", logging.TagUD(kv))
})
allocateFillerMutation := func(meta *MutationMeta, docid []byte) *MutationKeys {
mutk = NewMutationKeys()
mutk.meta = meta.Clone()
mutk.docid = docid
mutk.mut = mutk.mut[:0]
mut := NewMutation()
mut.command = common.Filler
mutk.mut = append(mutk.mut, mut)
return mutk
}
state := w.reader.getIndexerState()
for i, cmd := range kv.GetCommands() {
//based on the type of command take appropriate action
switch byte(cmd) {
//case protobuf.Command_Upsert, protobuf.Command_Deletion, protobuf.Command_UpsertDeletion:
case common.Upsert, common.Deletion, common.UpsertDeletion:
//As there can multiple keys in a KeyVersion for a mutation,
//filter needs to be evaluated and set only once.
if w.evalFilter {
w.evalFilter = false
//check the keyspaceId filter to see if this mutation can be processed
//valid mutation will increment seqno of the filter
w.skipMutation, meta.firstSnap = w.checkAndSetKeyspaceIdFilter(meta)
}
if w.skipMutation {
continue
}
w.reader.logReaderStat()
if state != common.INDEXER_ACTIVE {
if mutk != nil {
mutk.Free()
mutk = nil
}
continue
}
//allocate new mutation first time
if mutk == nil {
//TODO use free list here to reuse the struct and reduce garbage
mutk = NewMutationKeys()
mutk.meta = meta.Clone()
mutk.docid = kv.GetDocid()
mutk.mut = mutk.mut[:0]
}
mut := NewMutation()
mut.uuid = common.IndexInstId(kv.GetUuids()[i])
mut.key = append(mut.key, kv.GetKeys()[i]...)
mut.command = byte(kv.GetCommands()[i])
// For backward compatibilty, projector may not send partnkey pre-5.1.
if len(kv.GetPartnkeys()) != 0 && len(kv.GetPartnkeys()[i]) != 0 {
mut.partnkey = append(mut.partnkey, kv.GetPartnkeys()[i]...)
}
mutk.mut = append(mutk.mut, mut)
case common.DropData:
//send message to supervisor to take decision
msg := &MsgStream{mType: STREAM_READER_STREAM_DROP_DATA,
streamId: w.streamId,
meta: meta.Clone()}
w.reader.supvRespch <- msg
case common.StreamBegin:
status := common.STREAM_SUCCESS
code := byte(0)
len := len(kv.GetKeys()[i])
if len >= 1 {
status = common.StreamStatus(kv.GetKeys()[i][0])
}
if len >= 2 {
code = kv.GetKeys()[i][1]
}
if status == common.STREAM_SUCCESS {
w.updateVbuuidInFilter(meta)
}
//send message to supervisor to take decision
msg := &MsgStream{
mType: STREAM_READER_STREAM_BEGIN,
streamId: w.streamId,
node: kv.GetDocid(), // For projector versions prior to 6.5, docid would be "nil"
meta: meta.Clone(),
status: status,
errCode: code,
}
w.reader.supvRespch <- msg
case common.StreamEnd:
//send message to supervisor to take decision
msg := &MsgStream{mType: STREAM_READER_STREAM_END,
streamId: w.streamId,
meta: meta.Clone()}
w.reader.supvRespch <- msg
case common.Snapshot:
//get snapshot information from message
w.snapType, w.snapStart, w.snapEnd = kv.Snapshot()
// Snapshot marker can be processed only if
// they belong to ondisk type or inmemory type.
if w.snapType&(0x1|0x2) != 0 {
w.updateSnapInFilter(meta, w.snapStart, w.snapEnd)
}
case common.UpdateSeqno, common.SeqnoAdvanced:
//TODO Collections remove these logs after integration testing
if byte(cmd) == common.UpdateSeqno && w.streamId == common.INIT_STREAM {
logging.Fatalf("MutationStreamReader::handleSingleKeyVersion %v %v Unexpected UpdateSeqno "+
"%v %v", w.streamId, keyspaceId, meta, kv.GetDocid())
}
/* Disable the log message till further investigation (MB-39494)
if byte(cmd) == common.SeqnoAdvanced && w.streamId == common.MAINT_STREAM {
logging.Fatalf("MutationStreamReader::handleSingleKeyVersion %v %v Unexpected SeqnoAdvanced "+
"%v %v", w.streamId, keyspaceId, meta, kv.GetDocid())
}
*/
skipMutation, _ := w.checkAndSetKeyspaceIdFilter(meta)
//allocate an empty mutation for flusher
//TODO Collections can be done only for snapshot boundary
if !skipMutation {
mutk = allocateFillerMutation(meta, kv.GetDocid())
}
case common.CollectionCreate, common.CollectionDrop,
common.CollectionFlush, common.CollectionChanged,
common.ScopeCreate, common.ScopeDrop:
manifestuid := string(kv.GetKeys()[i])
scopeId := string(kv.GetOldkeys()[i])
collectionId := string(kv.GetPartnkeys()[i])
w.processDcpSystemEvent(meta, byte(cmd),
manifestuid, scopeId, collectionId)
skipMutation, _ := w.checkAndSetKeyspaceIdFilter(meta)
//allocate a filler mutation for flusher
//TODO can be done only for snapshot boundary
if !skipMutation {
mutk = allocateFillerMutation(meta, kv.GetDocid())
}
case common.OSOSnapshotStart, common.OSOSnapshotEnd:
w.updateOSOMarkerInFilter(meta, byte(cmd))
w.processDcpOSOMarker(meta, byte(cmd))
}
}
//place secKey in the right worker's queue
if mutk != nil {
w.handleSingleMutation(mutk, w.reader.stopch)
}
}
//handleSingleMutation enqueues mutation in the mutation queue
func (w *streamWorker) handleSingleMutation(mut *MutationKeys, stopch StopChannel) {
logging.LazyTrace(func() string {
return fmt.Sprintf("MutationStreamReader::handleSingleMutation received mutation %v", logging.TagUD(mut))
})
w.reader.queueMapLock.RLock()
defer w.reader.queueMapLock.RUnlock()
//based on the index, enqueue the mutation in the right queue
if q, ok := w.reader.keyspaceIdQueueMap[mut.meta.keyspaceId]; ok {
q.queue.Enqueue(mut, mut.meta.vbucket, stopch)
keyspaceStats := w.reader.stats.GetKeyspaceStats(w.streamId, mut.meta.keyspaceId)
if keyspaceStats != nil {
keyspaceStats.mutationQueueSize.Add(1)
keyspaceStats.numMutationsQueued.Add(1)
}
} else {
logging.Warnf("MutationStreamReader::handleSingleMutation got mutation for "+
"unknown keyspaceId:. Skipped %v", logging.TagUD(mut))
}
}
//initKeyspaceIdFilter initializes the keyspaceId filter
func (w *streamWorker) initKeyspaceIdFilter(keyspaceIdFilter map[string]*common.TsVbuuid,
keyspaceIdSessionId KeyspaceIdSessionId, keyspaceIdEnableOSO KeyspaceIdEnableOSO) {
w.lock.Lock()
defer w.lock.Unlock()
//allocate a new filter for the keyspaceIds which don't
//have a filter yet
for b, q := range w.reader.keyspaceIdQueueMap {
if _, ok := w.keyspaceIdFilter[b]; !ok {
logging.Debugf("MutationStreamReader::initKeyspaceIdFilter Added new filter "+
"for KeyspaceId %v Stream %v", b, w.streamId)
//if there is non-nil filter, use that. otherwise use a zero filter.
if filter, ok := keyspaceIdFilter[b]; ok && filter != nil {
w.keyspaceIdFilter[b] = filter.Copy()
w.keyspaceIdPrevSnapMap[b] = filter.Copy()
//reset vbuuids to 0 in filter. mutations for a vbucket are
//only processed after streambegin is received, which will set
//the vbuuid again.
for i := 0; i < len(filter.Vbuuids); i++ {
w.keyspaceIdFilter[b].Vbuuids[i] = 0
}
} else {
//actual TS uses bucket as keyspaceId
w.keyspaceIdFilter[b] = common.NewTsVbuuid(GetBucketFromKeyspaceId(b), int(q.queue.GetNumVbuckets()))
w.keyspaceIdPrevSnapMap[b] = common.NewTsVbuuid(GetBucketFromKeyspaceId(b), int(q.queue.GetNumVbuckets()))
}
w.keyspaceIdSyncDue[b] = false
w.keyspaceIdFirstSnap[b] = make(firstSnapFlag, int(q.queue.GetNumVbuckets()))
w.keyspaceIdSessionId[b] = keyspaceIdSessionId[b]
w.keyspaceIdEnableOSO[b] = keyspaceIdEnableOSO[b]
if keyspaceIdEnableOSO[b] {
w.keyspaceIdFilterOSO[b] = common.NewTsVbuuid(GetBucketFromKeyspaceId(b), int(q.queue.GetNumVbuckets()))
}
w.keyspaceIdOSOException[b] = false
//reset stat for bucket
keyspaceStats := w.reader.stats.GetKeyspaceStats(w.streamId, b)
if keyspaceStats != nil {
keyspaceStats.mutationQueueSize.Set(0)
}
}
}
//remove the keyspaceId filters for which keyspace doesn't exist anymore
for b := range w.keyspaceIdFilter {
if _, ok := w.reader.keyspaceIdQueueMap[b]; !ok {
logging.Debugf("MutationStreamReader::initKeyspaceIdFilter Deleted filter "+
"for KeyspaceId %v Stream %v", b, w.streamId)
delete(w.keyspaceIdFilter, b)
delete(w.keyspaceIdPrevSnapMap, b)
delete(w.keyspaceIdSyncDue, b)
delete(w.keyspaceIdFirstSnap, b)
delete(w.keyspaceIdSessionId, b)
delete(w.keyspaceIdFilterOSO, b)
delete(w.keyspaceIdEnableOSO, b)
delete(w.keyspaceIdOSOException, b)
}
}
}
//setKeyspaceIdFilter sets the keyspaceId filter based on seqno/vbuuid of mutation.
//filter is set when stream begin is received.
func (w *streamWorker) setKeyspaceIdFilter(meta *MutationMeta) {
w.lock.Lock()
defer w.lock.Unlock()
if filter, ok := w.keyspaceIdFilter[meta.keyspaceId]; ok {
filter.Seqnos[meta.vbucket] = meta.seqno
filter.Vbuuids[meta.vbucket] = uint64(meta.vbuuid)
logging.Tracef("MutationStreamReader::setKeyspaceIdFilter Vbucket %v "+
"Seqno %v KeyspaceId %v Stream %v", meta.vbucket, meta.seqno, meta.keyspaceId, w.streamId)
} else {
logging.Errorf("MutationStreamReader::setKeyspaceIdFilter Missing keyspaceId "+
"%v in Filter for Stream %v", meta.keyspaceId, w.streamId)
}
}
//checkAndSetKeyspaceIdFilter checks if mutation can be processed
//based on the current filter. Filter is also updated with new
//seqno/vbuuid if mutations can be processed.
//Returns {skip, firstSnap} to indicate if mutations needs to be "skipped" and
//if it belongs for first DCP snapshot.
func (w *streamWorker) checkAndSetKeyspaceIdFilter(meta *MutationMeta) (bool, bool) {
w.lock.Lock()
defer w.lock.Unlock()
if w.keyspaceIdOSOException[meta.keyspaceId] {
return true /* skip */, false /* firstSnap */