// hasSomeLifeLeft returns true if the lease has at least a minimum of
// lifetime left until expiration, and thus can be used.
func (s *LeaseState) hasSomeLifeLeft(clock *hlc.Clock) bool {
if s.testingKnobs.CanUseExpiredLeases {
return true
}
minDesiredExpiration := clock.Now().GoTime().Add(MinLeaseDuration)
return s.expiration.After(minDesiredExpiration)
}
// processReplica processes a single replica. This should not be
// called externally to the queue. bq.mu.Lock must not be held
// while calling this method.
func (bq *baseQueue) processReplica(
queueCtx context.Context, repl *Replica, clock *hlc.Clock,
) error {
bq.processMu.Lock()
defer bq.processMu.Unlock()
// Load the system config.
cfg, ok := bq.gossip.GetSystemConfig()
if !ok {
log.VEventf(queueCtx, 1, "no system config available, skipping")
return nil
}
if bq.requiresSplit(cfg, repl) {
// Range needs to be split due to zone configs, but queue does
// not accept unsplit ranges.
log.VEventf(queueCtx, 3, "split needed; skipping")
return nil
}
// Putting a span in a context means that events will no longer go to the
// event log. Use queueCtx for events that are intended for the event log.
ctx, span := bq.AnnotateCtxWithSpan(queueCtx, bq.name)
defer span.Finish()
// Also add the Replica annotations to ctx.
ctx = repl.AnnotateCtx(ctx)
ctx, cancel := context.WithTimeout(ctx, bq.processTimeout)
defer cancel()
log.Eventf(ctx, "processing replica")
if err := repl.IsDestroyed(); err != nil {
log.VEventf(queueCtx, 3, "replica destroyed (%s); skipping", err)
return nil
}
// If the queue requires a replica to have the range lease in
// order to be processed, check whether this replica has range lease
// and renew or acquire if necessary.
if bq.needsLease {
// Create a "fake" get request in order to invoke redirectOnOrAcquireLease.
if err := repl.redirectOnOrAcquireLease(ctx); err != nil {
switch v := err.GetDetail().(type) {
case *roachpb.NotLeaseHolderError, *roachpb.RangeNotFoundError:
log.VEventf(queueCtx, 3, "%s; skipping", v)
return nil
default:
return errors.Wrapf(err.GoError(), "%s: could not obtain lease", repl)
}
}
log.Event(ctx, "got range lease")
}
log.VEventf(queueCtx, 3, "processing")
if err := bq.impl.process(ctx, clock.Now(), repl, cfg); err != nil {
return err
}
log.Event(ctx, "done")
bq.successes.Inc(1)
return nil
}
// waitAndProcess waits for the pace interval and processes the replica
// if repl is not nil. The method returns true when the scanner needs
// to be stopped. The method also removes a replica from queues when it
// is signaled via the removed channel.
func (rs *replicaScanner) waitAndProcess(
ctx context.Context, start time.Time, clock *hlc.Clock, stopper *stop.Stopper, repl *Replica,
) bool {
waitInterval := rs.paceInterval(start, timeutil.Now())
rs.waitTimer.Reset(waitInterval)
if log.V(6) {
log.Infof(ctx, "wait timer interval set to %s", waitInterval)
}
for {
select {
case <-rs.waitTimer.C:
if log.V(6) {
log.Infof(ctx, "wait timer fired")
}
rs.waitTimer.Read = true
if repl == nil {
return false
}
if log.V(2) {
log.Infof(ctx, "replica scanner processing %s", repl)
}
for _, q := range rs.queues {
q.MaybeAdd(repl, clock.Now())
}
return false
case repl := <-rs.removed:
rs.removeReplica(repl)
case <-stopper.ShouldStop():
return true
}
}
}
// newTimestampCache returns a new timestamp cache with supplied
// hybrid clock.
func newTimestampCache(clock *hlc.Clock) *timestampCache {
tc := ×tampCache{
rCache: cache.NewIntervalCache(cache.Config{Policy: cache.CacheFIFO}),
wCache: cache.NewIntervalCache(cache.Config{Policy: cache.CacheFIFO}),
evictionSizeThreshold: defaultEvictionSizeThreshold,
}
tc.Clear(clock.Now())
tc.rCache.Config.ShouldEvict = tc.shouldEvict
tc.wCache.Config.ShouldEvict = tc.shouldEvict
return tc
}
func (m *LeaseManager) ExpireLeases(clock *hlc.Clock) {
past := clock.Now().GoTime().Add(-time.Millisecond)
m.tableNames.mu.Lock()
for _, lease := range m.tableNames.tables {
lease.expiration = parser.DTimestamp{
Time: past,
}
}
m.tableNames.mu.Unlock()
}
func (l *Liveness) isLive(clock *hlc.Clock) bool {
expiration := l.Expiration.Add(-int64(clock.MaxOffset()), 0)
return clock.Now().Less(expiration)
}
// hasSomeLifeLeft returns true if the lease has at least a minimum of lifetime
// left until expiration, and thus can be used.
func (s *LeaseState) hasSomeLifeLeft(clock *hlc.Clock) bool {
minDesiredExpiration := clock.Now().GoTime().Add(MinLeaseDuration)
return s.expiration.After(minDesiredExpiration)
}