func getKeyspaceShards(ctx context.Context, topoServ SrvTopoServer, cell, keyspace string, tabletType pb.TabletType) (string, *pb.SrvKeyspace, []*pb.ShardReference, error) {
srvKeyspace, err := topoServ.GetSrvKeyspace(ctx, cell, keyspace)
if err != nil {
return "", nil, nil, vterrors.NewVitessError(
vtrpc.ErrorCode_INTERNAL_ERROR, err,
"keyspace %v fetch error: %v", keyspace, err,
)
}
// check if the keyspace has been redirected for this tabletType.
for _, sf := range srvKeyspace.ServedFrom {
if sf.TabletType == tabletType {
keyspace = sf.Keyspace
srvKeyspace, err = topoServ.GetSrvKeyspace(ctx, cell, keyspace)
if err != nil {
return "", nil, nil, vterrors.NewVitessError(
vtrpc.ErrorCode_INTERNAL_ERROR, err,
"keyspace %v fetch error: %v", keyspace, err,
)
}
}
}
partition := topoproto.SrvKeyspaceGetPartition(srvKeyspace, tabletType)
if partition == nil {
return "", nil, nil, vterrors.NewVitessError(
vtrpc.ErrorCode_INTERNAL_ERROR, err,
"No partition found for tabletType %v in keyspace %v", strings.ToLower(tabletType.String()), keyspace,
)
}
return keyspace, srvKeyspace, partition.ShardReferences, nil
}
func getKeyspaceShards(ctx context.Context, topoServ SrvTopoServer, cell, keyspace string, tabletType pb.TabletType) (string, *topo.SrvKeyspace, []topo.ShardReference, error) {
srvKeyspace, err := topoServ.GetSrvKeyspace(ctx, cell, keyspace)
if err != nil {
return "", nil, nil, vterrors.NewVitessError(
vtrpc.ErrorCode_INTERNAL_ERROR, err,
"keyspace %v fetch error: %v", keyspace, err,
)
}
// check if the keyspace has been redirected for this tabletType.
tt := topo.ProtoToTabletType(tabletType)
if servedFrom, ok := srvKeyspace.ServedFrom[tt]; ok {
keyspace = servedFrom
srvKeyspace, err = topoServ.GetSrvKeyspace(ctx, cell, keyspace)
if err != nil {
return "", nil, nil, vterrors.NewVitessError(
vtrpc.ErrorCode_INTERNAL_ERROR, err,
"keyspace %v fetch error: %v", keyspace, err,
)
}
}
partition, ok := srvKeyspace.Partitions[tt]
if !ok {
return "", nil, nil, vterrors.NewVitessError(
vtrpc.ErrorCode_INTERNAL_ERROR, err,
"No partition found for tabletType %v in keyspace %v", strings.ToLower(tabletType.String()), keyspace,
)
}
return keyspace, srvKeyspace, partition.ShardReferences, nil
}
// getNewConn creates a new tablet connection with a separate per conn timeout.
// It limits the overall timeout to connTimeoutTotal by checking elapsed time after each blocking call.
func (sdc *ShardConn) getNewConn(ctx context.Context) (conn tabletconn.TabletConn, endPoint *topodatapb.EndPoint, isTimeout bool, err error) {
startTime := time.Now()
endPoints, err := sdc.balancer.Get()
if err != nil {
// Error when getting endpoint
return nil, nil, false, err
}
if len(endPoints) == 0 {
// No valid endpoint
return nil, nil, false, vterrors.FromError(
vtrpcpb.ErrorCode_INTERNAL_ERROR,
fmt.Errorf("no valid endpoint"),
)
}
if time.Now().Sub(startTime) >= sdc.connTimeoutTotal {
return nil, nil, true, vterrors.FromError(
vtrpcpb.ErrorCode_DEADLINE_EXCEEDED,
fmt.Errorf("timeout when getting endpoints"),
)
}
// Iterate through all endpoints to create a connection
perConnTimeout := sdc.getConnTimeoutPerConn(len(endPoints))
allErrors := new(concurrency.AllErrorRecorder)
for _, endPoint := range endPoints {
perConnStartTime := time.Now()
conn, err = tabletconn.GetDialer()(ctx, endPoint, sdc.keyspace, sdc.shard, topodatapb.TabletType_UNKNOWN, perConnTimeout)
if err == nil {
sdc.connectTimings.Record([]string{sdc.keyspace, sdc.shard, strings.ToLower(sdc.tabletType.String())}, perConnStartTime)
sdc.mu.Lock()
defer sdc.mu.Unlock()
sdc.conn = conn
return conn, endPoint, false, nil
}
// Markdown the endpoint if it failed to connect
sdc.balancer.MarkDown(endPoint.Uid, err.Error())
vtErr := vterrors.NewVitessError(
// TODO(aaijazi): what about OperationalErrors here?
vterrors.RecoverVtErrorCode(err), err,
"%v %+v", err, endPoint,
)
allErrors.RecordError(vtErr)
if time.Now().Sub(startTime) >= sdc.connTimeoutTotal {
err = vterrors.FromError(
vtrpcpb.ErrorCode_DEADLINE_EXCEEDED,
fmt.Errorf("timeout when connecting to %+v", endPoint),
)
allErrors.RecordError(err)
return nil, nil, true, allErrors.AggrError(AggregateVtGateErrors)
}
}
return nil, nil, false, allErrors.Error()
}
func gRPCVtworkerClientFactory(addr string, dialTimeout time.Duration) (vtworkerclient.Client, error) {
// create the RPC client
opt, err := grpcutils.ClientSecureDialOption(*cert, *key, *ca, *name)
if err != nil {
return nil, err
}
cc, err := grpc.Dial(addr, opt, grpc.WithBlock(), grpc.WithTimeout(dialTimeout))
if err != nil {
return nil, vterrors.NewVitessError(vtrpcpb.ErrorCode_DEADLINE_EXCEEDED, err, "grpc.Dial() err: %v", err)
}
c := vtworkerservicepb.NewVtworkerClient(cc)
return &gRPCVtworkerClient{
cc: cc,
c: c,
}, nil
}
// NewShardConn creates a new ShardConn. It creates a Balancer using
// serv, cell, keyspace, tabletType and retryDelay. retryCount is the max
// number of retries before a ShardConn returns an error on an operation.
func NewShardConn(ctx context.Context, serv topo.SrvTopoServer, cell, keyspace, shard string, tabletType topodatapb.TabletType, retryDelay time.Duration, retryCount int, connTimeoutTotal, connTimeoutPerConn, connLife time.Duration, tabletConnectTimings *stats.MultiTimings) *ShardConn {
getAddresses := func() (*topodatapb.EndPoints, error) {
endpoints, _, err := serv.GetEndPoints(ctx, cell, keyspace, shard, tabletType)
if err != nil {
return nil, vterrors.NewVitessError(
vtrpcpb.ErrorCode_INTERNAL_ERROR, err,
"endpoints fetch error: %v", err,
)
}
return endpoints, nil
}
blc := NewBalancer(getAddresses, retryDelay)
var ticker *timer.RandTicker
if tabletType != topodatapb.TabletType_MASTER {
ticker = timer.NewRandTicker(connLife, connLife/2)
}
sdc := &ShardConn{
keyspace: keyspace,
shard: shard,
tabletType: tabletType,
retryDelay: retryDelay,
retryCount: retryCount,
connTimeoutTotal: connTimeoutTotal,
connTimeoutPerConn: connTimeoutPerConn,
connLife: connLife,
balancer: blc,
ticker: ticker,
consolidator: sync2.NewConsolidator(),
connectTimings: tabletConnectTimings,
}
if ticker != nil {
go func() {
for range ticker.C {
sdc.closeCurrent()
}
}()
}
return sdc
}
// setAndStartWorker will set the current worker.
// We always log to both memory logger (for display on the web) and
// console logger (for records / display of command line worker).
func (wi *Instance) setAndStartWorker(ctx context.Context, wrk Worker, wr *wrangler.Wrangler) (chan struct{}, error) {
wi.currentWorkerMutex.Lock()
defer wi.currentWorkerMutex.Unlock()
if wi.currentContext != nil {
return nil, vterrors.FromError(vtrpcpb.ErrorCode_TRANSIENT_ERROR,
fmt.Errorf("A worker job is already in progress: %v", wi.currentWorker.StatusAsText()))
}
if wi.currentWorker != nil {
// During the grace period, we answer with a retryable error.
const gracePeriod = 1 * time.Minute
gracePeriodEnd := time.Now().Add(gracePeriod)
if wi.lastRunStopTime.Before(gracePeriodEnd) {
return nil, vterrors.FromError(vtrpcpb.ErrorCode_TRANSIENT_ERROR,
fmt.Errorf("A worker job was recently stopped (%f seconds ago): %v",
time.Now().Sub(wi.lastRunStopTime).Seconds(),
wi.currentWorker))
}
// QUERY_NOT_SERVED = FailedPrecondition => manual resolution required.
return nil, vterrors.FromError(vtrpcpb.ErrorCode_QUERY_NOT_SERVED,
fmt.Errorf("The worker job was stopped %.1f minutes ago, but not reset. You have to reset it manually. Job: %v",
time.Now().Sub(wi.lastRunStopTime).Minutes(),
wi.currentWorker))
}
wi.currentWorker = wrk
wi.currentMemoryLogger = logutil.NewMemoryLogger()
wi.currentContext, wi.currentCancelFunc = context.WithCancel(ctx)
wi.lastRunError = nil
wi.lastRunStopTime = time.Unix(0, 0)
done := make(chan struct{})
wranglerLogger := wr.Logger()
if wr == wi.wr {
// If it's the default wrangler, do not reuse its logger because it may have been set before.
// Resuing it would result into an endless recursion.
wranglerLogger = logutil.NewConsoleLogger()
}
wr.SetLogger(logutil.NewTeeLogger(wi.currentMemoryLogger, wranglerLogger))
// one go function runs the worker, changes state when done
go func() {
log.Infof("Starting worker...")
var err error
// Catch all panics and always save the execution state at the end.
defer func() {
// The recovery code is a copy of servenv.HandlePanic().
if x := recover(); x != nil {
log.Errorf("uncaught vtworker panic: %v\n%s", x, tb.Stack(4))
err = fmt.Errorf("uncaught vtworker panic: %v", x)
}
wi.currentWorkerMutex.Lock()
wi.currentContext = nil
wi.currentCancelFunc = nil
wi.lastRunError = err
wi.lastRunStopTime = time.Now()
wi.currentWorkerMutex.Unlock()
close(done)
}()
// run will take a long time
err = wrk.Run(wi.currentContext)
// If the context was canceled, include the respective error code.
select {
case <-wi.currentContext.Done():
// Context is done i.e. probably canceled.
if wi.currentContext.Err() == context.Canceled {
err = vterrors.NewVitessError(vtrpcpb.ErrorCode_CANCELLED, err, "vtworker command was canceled: %v", err)
}
default:
}
}()
return done, nil
}