func (sc *SchemaChanger) maybeWriteResumeSpan(
txn *client.Txn,
version sqlbase.DescriptorVersion,
resume roachpb.Span,
mutationIdx int,
lastCheckpoint *time.Time,
) error {
checkpointInterval := checkpointInterval
if sc.testingKnobs.WriteCheckpointInterval > 0 {
checkpointInterval = sc.testingKnobs.WriteCheckpointInterval
}
if timeutil.Since(*lastCheckpoint) < checkpointInterval {
return nil
}
tableDesc, err := sqlbase.GetTableDescFromID(txn, sc.tableID)
if err != nil {
return err
}
if tableDesc.Version != version {
return errVersionMismatch
}
tableDesc.Mutations[mutationIdx].ResumeSpan = resume
txn.SetSystemConfigTrigger()
if err := txn.Put(sqlbase.MakeDescMetadataKey(tableDesc.GetID()),
sqlbase.WrapDescriptor(tableDesc)); err != nil {
return err
}
*lastCheckpoint = timeutil.Now()
return nil
}
// 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, "%s: split needed; skipping", repl)
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 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 {
if _, harmless := err.GetDetail().(*roachpb.NotLeaseHolderError); harmless {
log.VEventf(queueCtx, 3, "not holding lease; skipping")
return nil
}
return errors.Wrapf(err.GoError(), "%s: could not obtain lease", repl)
}
log.Event(ctx, "got range lease")
}
log.VEventf(queueCtx, 3, "processing")
start := timeutil.Now()
err := bq.impl.process(ctx, clock.Now(), repl, cfg)
duration := timeutil.Since(start)
bq.processingNanos.Inc(duration.Nanoseconds())
if err != nil {
return err
}
log.VEventf(queueCtx, 2, "done: %s", duration)
log.Event(ctx, "done")
bq.successes.Inc(1)
return nil
}
func testDecimalSingleArgFunc(
t *testing.T,
f func(*inf.Dec, *inf.Dec, inf.Scale) (*inf.Dec, error),
s inf.Scale,
tests []decimalOneArgTestCase,
) {
for _, tc := range tests {
t.Run(fmt.Sprintf("%s = %s", tc.input, tc.expected), func(t *testing.T) {
x, exp := new(inf.Dec), new(inf.Dec)
x.SetString(tc.input)
exp.SetString(tc.expected)
// Test allocated return value.
var z *inf.Dec
var err error
done := make(chan struct{}, 1)
start := timeutil.Now()
go func() {
z, err = f(nil, x, s)
done <- struct{}{}
}()
var after <-chan time.Time
if *flagDurationLimit > 0 {
after = time.After(*flagDurationLimit)
}
select {
case <-done:
t.Logf("execute duration: %s", timeutil.Since(start))
case <-after:
t.Fatalf("timedout after %s", *flagDurationLimit)
}
if err != nil {
if tc.expected != err.Error() {
t.Errorf("expected error %s, got %s", tc.expected, err)
}
return
}
if exp.Cmp(z) != 0 {
t.Errorf("expected %s, got %s", exp, z)
}
// Test provided decimal mutation.
z.SetString("0.0")
_, _ = f(z, x, s)
if exp.Cmp(z) != 0 {
t.Errorf("expected %s, got %s", exp, z)
}
// Test same arg mutation.
_, _ = f(x, x, s)
if exp.Cmp(x) != 0 {
t.Errorf("expected %s, got %s", exp, x)
}
x.SetString(tc.input)
})
}
}
func testPutInner(ctx context.Context, t *testing.T, c cluster.Cluster, cfg cluster.TestConfig) {
db, err := c.NewClient(ctx, 0)
if err != nil {
t.Fatal(err)
}
errs := make(chan error, c.NumNodes())
start := timeutil.Now()
deadline := start.Add(cfg.Duration)
var count int64
for i := 0; i < c.NumNodes(); i++ {
go func() {
r, _ := randutil.NewPseudoRand()
value := randutil.RandBytes(r, 8192)
for timeutil.Now().Before(deadline) {
k := atomic.AddInt64(&count, 1)
v := value[:r.Intn(len(value))]
if err := db.Put(ctx, fmt.Sprintf("%08d", k), v); err != nil {
errs <- err
return
}
}
errs <- nil
}()
}
for i := 0; i < c.NumNodes(); {
baseCount := atomic.LoadInt64(&count)
select {
case <-stopper.ShouldStop():
t.Fatalf("interrupted")
case err := <-errs:
if err != nil {
t.Fatal(err)
}
i++
case <-time.After(1 * time.Second):
// Periodically print out progress so that we know the test is still
// running.
loadedCount := atomic.LoadInt64(&count)
log.Infof(ctx, "%d (%d/s)", loadedCount, loadedCount-baseCount)
c.Assert(ctx, t)
if err := cluster.Consistent(ctx, c, 0); err != nil {
t.Fatal(err)
}
}
}
elapsed := timeutil.Since(start)
log.Infof(ctx, "%d %.1f/sec", count, float64(count)/elapsed.Seconds())
}
func (at *allocatorTest) runSchemaChanges(ctx context.Context, t *testing.T) error {
db, err := gosql.Open("postgres", at.f.PGUrl(ctx, 0))
if err != nil {
return err
}
defer func() {
_ = db.Close()
}()
const tableName = "datablocks.blocks"
schemaChanges := []string{
"ALTER TABLE %s ADD COLUMN newcol DECIMAL DEFAULT (DECIMAL '1.4')",
"CREATE INDEX foo ON %s (block_id)",
}
var wg sync.WaitGroup
wg.Add(len(schemaChanges))
for i := range schemaChanges {
go func(i int) {
start := timeutil.Now()
cmd := fmt.Sprintf(schemaChanges[i], tableName)
log.Infof(ctx, "starting schema change: %s", cmd)
if _, err := db.Exec(cmd); err != nil {
log.Infof(ctx, "hit schema change error: %s, for %s, in %s", err, cmd, timeutil.Since(start))
t.Error(err)
return
}
log.Infof(ctx, "completed schema change: %s, in %s", cmd, timeutil.Since(start))
wg.Done()
// TODO(vivek): Monitor progress of schema changes and log progress.
}(i)
}
wg.Wait()
log.Info(ctx, "validate applied schema changes")
if err := at.ValidateSchemaChanges(ctx, t); err != nil {
t.Fatal(err)
}
return nil
}
func testClusterRecoveryInner(
ctx context.Context, t *testing.T, c cluster.Cluster, cfg cluster.TestConfig,
) {
num := c.NumNodes()
// One client for each node.
initBank(t, c.PGUrl(ctx, 0))
start := timeutil.Now()
state := testState{
t: t,
errChan: make(chan error, num),
teardown: make(chan struct{}),
deadline: start.Add(cfg.Duration),
clients: make([]testClient, num),
}
for i := 0; i < num; i++ {
state.clients[i].Lock()
state.initClient(ctx, t, c, i)
state.clients[i].Unlock()
go transferMoneyLoop(ctx, i, &state, *numAccounts, *maxTransfer)
}
defer func() {
<-state.teardown
}()
// Chaos monkey.
rnd, seed := randutil.NewPseudoRand()
log.Warningf(ctx, "monkey starts (seed %d)", seed)
pickNodes := func() []int {
return rnd.Perm(num)[:rnd.Intn(num)+1]
}
go chaosMonkey(ctx, &state, c, true, pickNodes, 0)
waitClientsStop(ctx, num, &state, stall)
// Verify accounts.
verifyAccounts(t, &state.clients[0])
elapsed := timeutil.Since(start)
var count uint64
counts := state.counts()
for _, c := range counts {
count += c
}
log.Infof(ctx, "%d %.1f/sec", count, float64(count)/elapsed.Seconds())
}
func TestSucceedsSoon(t *testing.T) {
// Try a method which always succeeds.
SucceedsSoon(t, func() error { return nil })
// Try a method which succeeds after a known duration.
start := timeutil.Now()
duration := time.Millisecond * 10
SucceedsSoon(t, func() error {
elapsed := timeutil.Since(start)
if elapsed > duration {
return nil
}
return errors.Errorf("%s elapsed, waiting until %s elapses", elapsed, duration)
})
}
func (s *server) status() string {
s.mu.Lock()
defer s.mu.Unlock()
var buf bytes.Buffer
fmt.Fprintf(&buf, "gossip server (%d/%d cur/max conns, %s)\n",
s.mu.incoming.gauge.Value(), s.mu.incoming.maxSize, s.serverMetrics)
for addr, info := range s.mu.nodeMap {
// TODO(peter): Report per connection sent/received statistics. The
// structure of server.Gossip and server.gossipReceiver makes this
// irritating to track.
fmt.Fprintf(&buf, " %d: %s (%s)\n",
info.peerID, addr.AddressField, roundSecs(timeutil.Since(info.createdAt)))
}
return buf.String()
}
// waitForFullReplication waits for the cluster to be fully replicated.
func (c *Cluster) waitForFullReplication() {
for i := 1; true; i++ {
done, detail := c.isReplicated()
if (done && i >= 50) || (i%50) == 0 {
fmt.Print(detail)
log.Infof(context.Background(), "waiting for replication")
}
if done {
break
}
time.Sleep(100 * time.Millisecond)
}
log.Infof(context.Background(), "replicated %.3fs", timeutil.Since(c.started).Seconds())
}
func (g *Gossip) clientStatus() string {
var buf bytes.Buffer
g.mu.Lock()
defer g.mu.Unlock()
g.clientsMu.Lock()
defer g.clientsMu.Unlock()
fmt.Fprintf(&buf, "gossip client (%d/%d cur/max conns)\n", len(g.clientsMu.clients), g.outgoing.maxSize)
for _, c := range g.clientsMu.clients {
fmt.Fprintf(&buf, " %d: %s (%s: %s)\n",
c.peerID, c.addr, roundSecs(timeutil.Since(c.createdAt)), c.clientMetrics)
}
return buf.String()
}
func testNodeRestartInner(
ctx context.Context, t *testing.T, c cluster.Cluster, cfg cluster.TestConfig,
) {
num := c.NumNodes()
if minNum := 3; num < minNum {
t.Skipf("need at least %d nodes, got %d", minNum, num)
}
// One client for each node.
initBank(t, c.PGUrl(ctx, 0))
start := timeutil.Now()
state := testState{
t: t,
errChan: make(chan error, 1),
teardown: make(chan struct{}),
deadline: start.Add(cfg.Duration),
clients: make([]testClient, 1),
}
clientIdx := num - 1
client := &state.clients[0]
client.Lock()
client.db = makePGClient(t, c.PGUrl(ctx, clientIdx))
client.Unlock()
go transferMoneyLoop(ctx, 0, &state, *numAccounts, *maxTransfer)
defer func() {
<-state.teardown
}()
// Chaos monkey.
rnd, seed := randutil.NewPseudoRand()
log.Warningf(ctx, "monkey starts (seed %d)", seed)
pickNodes := func() []int {
return []int{rnd.Intn(clientIdx)}
}
go chaosMonkey(ctx, &state, c, false, pickNodes, clientIdx)
waitClientsStop(ctx, 1, &state, stall)
// Verify accounts.
verifyAccounts(t, client)
elapsed := timeutil.Since(start)
count := atomic.LoadUint64(&client.count)
log.Infof(ctx, "%d %.1f/sec", count, float64(count)/elapsed.Seconds())
}
// finishSQLTxn closes the root span for the current SQL txn.
// This needs to be called before resetForNewSQLTransaction() is called for
// starting another SQL txn.
// The session context is just used for logging the SQL trace.
func (ts *txnState) finishSQLTxn(sessionCtx context.Context) {
ts.mon.Stop(ts.Ctx)
if ts.sp == nil {
panic("No span in context? Was resetForNewSQLTxn() called previously?")
}
sampledFor7881 := (ts.sp.BaggageItem(keyFor7881Sample) != "")
ts.sp.Finish()
ts.sp = nil
if (traceSQL && timeutil.Since(ts.sqlTimestamp) >= traceSQLDuration) ||
(traceSQLFor7881 && sampledFor7881) {
dump := tracing.FormatRawSpans(ts.CollectedSpans)
if len(dump) > 0 {
log.Infof(sessionCtx, "SQL trace:\n%s", dump)
}
}
}
// scanLoop loops endlessly, scanning through replicas available via
// the replica set, or until the scanner is stopped. The iteration
// is paced to complete a full scan in approximately the scan interval.
func (rs *replicaScanner) scanLoop(clock *hlc.Clock, stopper *stop.Stopper) {
stopper.RunWorker(func() {
ctx := rs.AnnotateCtx(context.Background())
start := timeutil.Now()
// waitTimer is reset in each call to waitAndProcess.
defer rs.waitTimer.Stop()
for {
if rs.GetDisabled() {
if done := rs.waitEnabled(stopper); done {
return
}
continue
}
var shouldStop bool
count := 0
rs.replicas.Visit(func(repl *Replica) bool {
count++
shouldStop = rs.waitAndProcess(ctx, start, clock, stopper, repl)
return !shouldStop
})
if count == 0 {
// No replicas processed, just wait.
shouldStop = rs.waitAndProcess(ctx, start, clock, stopper, nil)
}
shouldStop = shouldStop || nil != stopper.RunTask(func() {
// Increment iteration count.
rs.mu.Lock()
defer rs.mu.Unlock()
rs.mu.scanCount++
rs.mu.total += timeutil.Since(start)
if log.V(6) {
log.Infof(ctx, "reset replica scan iteration")
}
// Reset iteration and start time.
start = timeutil.Now()
})
if shouldStop {
return
}
}
})
}
// Start starts a cluster. The numWorkers parameter controls the SQL connection
// settings to avoid unnecessary connection creation. The args parameter can be
// used to pass extra arguments to each node.
func (c *Cluster) Start(db string, numWorkers int, args, env []string) {
c.started = timeutil.Now()
baseCtx := &base.Config{
User: security.NodeUser,
Insecure: true,
}
c.rpcCtx = rpc.NewContext(log.AmbientContext{}, baseCtx, nil, c.stopper)
for i := range c.Nodes {
c.Nodes[i] = c.makeNode(i, args, env)
c.Clients[i] = c.makeClient(i)
c.Status[i] = c.makeStatus(i)
c.DB[i] = c.makeDB(i, numWorkers, db)
}
log.Infof(context.Background(), "started %.3fs", timeutil.Since(c.started).Seconds())
c.waitForFullReplication()
}
// PeriodicallyCheckForUpdates starts a background worker that periodically
// phones home to check for updates and report usage.
func (s *Server) PeriodicallyCheckForUpdates() {
s.stopper.RunWorker(func() {
startup := timeutil.Now()
for {
// `maybeCheckForUpdates` and `maybeReportUsage` both return the
// duration until they should next be checked.
// Wait for the shorter of the durations returned by the two checks.
wait := s.maybeCheckForUpdates()
if reportWait := s.maybeReportUsage(timeutil.Since(startup)); reportWait < wait {
wait = reportWait
}
jitter := rand.Intn(updateCheckJitterSeconds) - updateCheckJitterSeconds/2
wait = wait + (time.Duration(jitter) * time.Second)
select {
case <-s.stopper.ShouldQuiesce():
return
case <-time.After(wait):
}
}
})
}
func (r *rocksDBBatch) Commit() error {
if r.closed() {
panic("this batch was already committed")
}
start := timeutil.Now()
var count, size int
r.distinctOpen = false
if r.flushes > 0 {
// We've previously flushed mutations to the C++ batch, so we have to flush
// any remaining mutations as well and then commit the batch.
r.flushMutations()
if err := statusToError(C.DBCommitAndCloseBatch(r.batch)); err != nil {
return err
}
r.batch = nil
count, size = r.flushedCount, r.flushedSize
} else if r.builder.count > 0 {
count, size = r.builder.count, len(r.builder.repr)
// Fast-path which avoids flushing mutations to the C++ batch. Instead, we
// directly apply the mutations to the database.
if err := r.parent.ApplyBatchRepr(r.builder.Finish()); err != nil {
return err
}
C.DBClose(r.batch)
r.batch = nil
}
const batchCommitWarnThreshold = 500 * time.Millisecond
if elapsed := timeutil.Since(start); elapsed >= batchCommitWarnThreshold {
log.Warningf(context.TODO(), "batch [%d/%d/%d] commit took %s (>%s):\n%s",
count, size, r.flushes, elapsed, batchCommitWarnThreshold, debug.Stack())
}
return nil
}
func TestConcurrentBatch(t *testing.T) {
defer leaktest.AfterTest(t)()
dir, err := ioutil.TempDir("", "TestConcurrentBatch")
if err != nil {
t.Fatal(err)
}
defer func() {
if err := os.RemoveAll(dir); err != nil {
t.Fatal(err)
}
}()
db, err := NewRocksDB(roachpb.Attributes{}, dir, RocksDBCache{},
0, DefaultMaxOpenFiles)
if err != nil {
t.Fatalf("could not create new rocksdb db instance at %s: %v", dir, err)
}
defer db.Close()
// Prepare 16 4 MB batches containing non-overlapping contents.
var batches []Batch
for i := 0; i < 16; i++ {
batch := db.NewBatch()
for j := 0; true; j++ {
key := encoding.EncodeUvarintAscending([]byte("bar"), uint64(i))
key = encoding.EncodeUvarintAscending(key, uint64(j))
if err := batch.Put(MakeMVCCMetadataKey(key), nil); err != nil {
t.Fatal(err)
}
if len(batch.Repr()) >= 4<<20 {
break
}
}
batches = append(batches, batch)
}
errChan := make(chan error, len(batches))
// Concurrently write all the batches.
for _, batch := range batches {
go func(batch Batch) {
errChan <- batch.Commit()
}(batch)
}
// While the batch writes are in progress, try to write another key.
time.Sleep(100 * time.Millisecond)
remainingBatches := len(batches)
for i := 0; remainingBatches > 0; i++ {
select {
case err := <-errChan:
if err != nil {
t.Fatal(err)
}
remainingBatches--
default:
}
// This write can get delayed excessively if we hit the max memtable count
// or the L0 stop writes threshold.
start := timeutil.Now()
key := encoding.EncodeUvarintAscending([]byte("foo"), uint64(i))
if err := db.Put(MakeMVCCMetadataKey(key), nil); err != nil {
t.Fatal(err)
}
if elapsed := timeutil.Since(start); elapsed >= 10*time.Second {
t.Fatalf("write took %0.1fs\n", elapsed.Seconds())
}
}
}
// grpcTransportFactory during race builds wraps the implementation and
// intercepts all BatchRequests, reading them in a tight loop. This allows the
// race detector to catch any mutations of a batch passed to the transport.
func grpcTransportFactory(
opts SendOptions, rpcContext *rpc.Context, replicas ReplicaSlice, args roachpb.BatchRequest,
) (Transport, error) {
if atomic.AddInt32(&running, 1) <= 1 {
rpcContext.Stopper.RunWorker(func() {
var iters int
var curIdx int
defer func() {
atomic.StoreInt32(&running, 0)
log.Infof(
context.TODO(),
"transport race promotion: ran %d iterations on up to %d requests",
iters, curIdx+1,
)
}()
// Make a fixed-size slice of *BatchRequest. When full, entries
// are evicted in FIFO order.
const size = 1000
bas := make([]*roachpb.BatchRequest, size)
encoder := gob.NewEncoder(ioutil.Discard)
for {
iters++
start := timeutil.Now()
for _, ba := range bas {
if ba != nil {
if err := encoder.Encode(ba); err != nil {
panic(err)
}
}
}
// Prevent the goroutine from spinning too hot as this lets CI
// times skyrocket. Sleep on average for as long as we worked
// on the last iteration so we spend no more than half our CPU
// time on this task.
jittered := time.After(jitter(timeutil.Since(start)))
// Collect incoming requests until the jittered timer fires,
// then access everything we have.
for {
select {
case <-rpcContext.Stopper.ShouldStop():
return
case ba := <-incoming:
bas[curIdx%size] = ba
curIdx++
continue
case <-jittered:
}
break
}
}
})
}
select {
// We have a shallow copy here and so the top level scalar fields can't
// really race, but making more copies doesn't make anything more
// transparent, so from now on we operate on a pointer.
case incoming <- &args:
default:
// Avoid slowing down the tests if we're backed up.
}
return grpcTransportFactoryImpl(opts, rpcContext, replicas, args)
}
// Test that a connection closed abruptly while a SQL txn is in progress results
// in that txn being rolled back.
func TestSessionFinishRollsBackTxn(t *testing.T) {
defer leaktest.AfterTest(t)()
aborter := NewTxnAborter()
defer aborter.Close(t)
params, _ := createTestServerParams()
params.Knobs.SQLExecutor = aborter.executorKnobs()
s, mainDB, _ := serverutils.StartServer(t, params)
defer s.Stopper().Stop()
{
pgURL, cleanup := sqlutils.PGUrl(
t, s.ServingAddr(), "TestSessionFinishRollsBackTxn", url.User(security.RootUser))
defer cleanup()
if err := aborter.Init(pgURL); err != nil {
t.Fatal(err)
}
}
if _, err := mainDB.Exec(`
CREATE DATABASE t;
CREATE TABLE t.test (k INT PRIMARY KEY, v TEXT);
`); err != nil {
t.Fatal(err)
}
// We're going to test the rollback of transactions left in various states
// when the connection closes abruptly.
// For the state CommitWait, there's no actual rollback we can test for (since
// the kv-level transaction has already been committed). But we still
// exercise this state to check that the server doesn't crash (which used to
// happen - #9879).
tests := []sql.TxnStateEnum{sql.Open, sql.RestartWait, sql.CommitWait}
for _, state := range tests {
t.Run(state.String(), func(t *testing.T) {
// Create a low-level lib/pq connection so we can close it at will.
pgURL, cleanupDB := sqlutils.PGUrl(
t, s.ServingAddr(), state.String(), url.User(security.RootUser))
defer cleanupDB()
conn, err := pq.Open(pgURL.String())
if err != nil {
t.Fatal(err)
}
connClosed := false
defer func() {
if connClosed {
return
}
if err := conn.Close(); err != nil {
t.Fatal(err)
}
}()
txn, err := conn.Begin()
if err != nil {
t.Fatal(err)
}
tx := txn.(driver.Execer)
if _, err := tx.Exec("SET TRANSACTION PRIORITY NORMAL", nil); err != nil {
t.Fatal(err)
}
if state == sql.RestartWait || state == sql.CommitWait {
if _, err := tx.Exec("SAVEPOINT cockroach_restart", nil); err != nil {
t.Fatal(err)
}
}
insertStmt := "INSERT INTO t.test(k, v) VALUES (1, 'a')"
if state == sql.RestartWait {
// To get a txn in RestartWait, we'll use an aborter.
if err := aborter.QueueStmtForAbortion(
insertStmt, 1 /* restartCount */, false /* willBeRetriedIbid */); err != nil {
t.Fatal(err)
}
}
if _, err := tx.Exec(insertStmt, nil); err != nil {
t.Fatal(err)
}
if err := aborter.VerifyAndClear(); err != nil {
t.Fatal(err)
}
if state == sql.RestartWait || state == sql.CommitWait {
_, err := tx.Exec("RELEASE SAVEPOINT cockroach_restart", nil)
if state == sql.CommitWait {
if err != nil {
t.Fatal(err)
}
} else if !testutils.IsError(err, "pq: restart transaction:.*") {
t.Fatal(err)
}
}
// Abruptly close the connection.
connClosed = true
if err := conn.Close(); err != nil {
t.Fatal(err)
}
// Check that the txn we had above was rolled back. We do this by reading
// after the preceding txn and checking that we don't get an error and
// that we haven't been blocked by intents (we can't exactly test that we
// haven't been blocked but we assert that the query didn't take too
// long).
// We do the read in an explicit txn so that automatic retries don't hide
// any errors.
// TODO(andrei): Figure out a better way to test for non-blocking.
// Use a trace when the client-side tracing story gets good enough.
txCheck, err := mainDB.Begin()
if err != nil {
t.Fatal(err)
}
// Run check at low priority so we don't push the previous transaction and
// fool ourselves into thinking it had been rolled back.
if _, err := txCheck.Exec("SET TRANSACTION PRIORITY LOW"); err != nil {
t.Fatal(err)
}
ts := timeutil.Now()
var count int
if err := txCheck.QueryRow("SELECT COUNT(1) FROM t.test").Scan(&count); err != nil {
t.Fatal(err)
}
// CommitWait actually committed, so we'll need to clean up.
if state != sql.CommitWait {
if count != 0 {
t.Fatalf("expected no rows, got: %d", count)
}
} else {
if _, err := txCheck.Exec("DELETE FROM t.test"); err != nil {
t.Fatal(err)
}
}
if err := txCheck.Commit(); err != nil {
t.Fatal(err)
}
if d := timeutil.Since(ts); d > time.Second {
t.Fatalf("Looks like the checking tx was unexpectedly blocked. "+
"It took %s to commit.", d)
}
})
}
}
// TestDumpRandom generates a random number of random rows with all data
// types. This data is dumped, inserted, and dumped again. The two dumps
// are compared for exactness. The data from the inserted dump is then
// SELECT'd and compared to the original generated data to ensure it is
// round-trippable.
func TestDumpRandom(t *testing.T) {
defer leaktest.AfterTest(t)()
c, err := newCLITest(t, false)
if err != nil {
t.Fatal(err)
}
defer c.stop(true)
url, cleanup := sqlutils.PGUrl(t, c.ServingAddr(), "TestDumpRandom", url.User(security.RootUser))
defer cleanup()
conn := makeSQLConn(url.String())
defer conn.Close()
if err := conn.Exec(`
CREATE DATABASE d;
CREATE DATABASE o;
CREATE TABLE d.t (
rowid int,
i int,
f float,
d date,
m timestamp,
n interval,
o bool,
e decimal,
s string,
b bytes,
PRIMARY KEY (rowid, i, f, d, m, n, o, e, s, b)
);
`, nil); err != nil {
t.Fatal(err)
}
rnd, seed := randutil.NewPseudoRand()
t.Logf("random seed: %v", seed)
start := timeutil.Now()
for iteration := 0; timeutil.Since(start) < *randomTestTime; iteration++ {
if err := conn.Exec(`DELETE FROM d.t`, nil); err != nil {
t.Fatal(err)
}
var generatedRows [][]driver.Value
count := rnd.Int63n(500)
t.Logf("random iteration %v: %v rows", iteration, count)
for _i := int64(0); _i < count; _i++ {
// Generate a random number of random inserts.
i := rnd.Int63()
f := rnd.Float64()
d := time.Unix(0, rnd.Int63()).Round(time.Hour * 24).UTC()
m := time.Unix(0, rnd.Int63()).Round(time.Microsecond).UTC()
n := time.Duration(rnd.Int63()).String()
o := rnd.Intn(2) == 1
e := strings.TrimRight(inf.NewDec(rnd.Int63(), inf.Scale(rnd.Int31n(20)-10)).String(), ".0")
sr := make([]byte, rnd.Intn(500))
if _, err := rnd.Read(sr); err != nil {
t.Fatal(err)
}
s := make([]byte, 0, len(sr))
for _, b := range sr {
r := rune(b)
if !utf8.ValidRune(r) {
continue
}
s = append(s, []byte(string(r))...)
}
b := make([]byte, rnd.Intn(500))
if _, err := rnd.Read(b); err != nil {
t.Fatal(err)
}
vals := []driver.Value{
_i,
i,
f,
d,
m,
[]byte(n), // intervals come out as `[]byte`s
o,
[]byte(e), // decimals come out as `[]byte`s
string(s),
b,
}
if err := conn.Exec("INSERT INTO d.t VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)", vals); err != nil {
t.Fatal(err)
}
generatedRows = append(generatedRows, vals[1:])
}
check := func(table string) {
q := fmt.Sprintf("SELECT i, f, d, m, n, o, e, s, b FROM %s ORDER BY rowid", table)
nrows, err := conn.Query(q, nil)
if err != nil {
t.Fatal(err)
}
defer func() {
if err := nrows.Close(); err != nil {
t.Fatal(err)
}
}()
for gi, generatedRow := range generatedRows {
fetched := make([]driver.Value, len(nrows.Columns()))
if err := nrows.Next(fetched); err != nil {
t.Fatal(err)
}
for i, fetchedVal := range fetched {
generatedVal := generatedRow[i]
if t, ok := fetchedVal.(time.Time); ok {
// dates and timestamps come out with offset zero (but
// not UTC specifically).
fetchedVal = t.UTC()
}
if !reflect.DeepEqual(fetchedVal, generatedVal) {
t.Errorf("NOT EQUAL: table %s, row %d, col %d\ngenerated (%T): %v\nselected (%T): %v\n", table, gi, i, generatedVal, generatedVal, fetchedVal, fetchedVal)
}
}
if t.Failed() {
t.FailNow()
}
}
}
check("d.t")
var buf bytes.Buffer
if err := DumpTable(&buf, conn, "d", "t"); err != nil {
t.Fatal(err)
}
dump := buf.String()
buf.Reset()
if err := conn.Exec(`
SET DATABASE = o;
DROP TABLE IF EXISTS t;
`, nil); err != nil {
t.Fatal(err)
}
if err := conn.Exec(dump, nil); err != nil {
t.Fatal(err)
}
check("o.t")
if err := DumpTable(&buf, conn, "o", "t"); err != nil {
t.Fatal(err)
}
dump2 := buf.String()
if dump != dump2 {
t.Fatalf("unmatching dumps:\nFIRST:\n%s\n\nSECOND:\n%s", dump, dump2)
}
}
}
// Start starts a goroutine that runs outstanding schema changes
// for tables received in the latest system configuration via gossip.
func (s *SchemaChangeManager) Start(stopper *stop.Stopper) {
stopper.RunWorker(func() {
descKeyPrefix := keys.MakeTablePrefix(uint32(sqlbase.DescriptorTable.ID))
gossipUpdateC := s.gossip.RegisterSystemConfigChannel()
timer := &time.Timer{}
delay := 360 * time.Second
if s.testingKnobs.AsyncExecQuickly {
delay = 20 * time.Millisecond
}
for {
select {
case <-gossipUpdateC:
cfg, _ := s.gossip.GetSystemConfig()
// Read all tables and their versions
if log.V(2) {
log.Info(context.TODO(), "received a new config")
}
schemaChanger := SchemaChanger{
nodeID: s.leaseMgr.nodeID.Get(),
db: s.db,
leaseMgr: s.leaseMgr,
testingKnobs: s.testingKnobs,
}
// Keep track of existing schema changers.
oldSchemaChangers := make(map[sqlbase.ID]struct{}, len(s.schemaChangers))
for k := range s.schemaChangers {
oldSchemaChangers[k] = struct{}{}
}
execAfter := timeutil.Now().Add(delay)
// Loop through the configuration to find all the tables.
for _, kv := range cfg.Values {
if !bytes.HasPrefix(kv.Key, descKeyPrefix) {
continue
}
// Attempt to unmarshal config into a table/database descriptor.
var descriptor sqlbase.Descriptor
if err := kv.Value.GetProto(&descriptor); err != nil {
log.Warningf(context.TODO(), "%s: unable to unmarshal descriptor %v", kv.Key, kv.Value)
continue
}
switch union := descriptor.Union.(type) {
case *sqlbase.Descriptor_Table:
table := union.Table
table.MaybeUpgradeFormatVersion()
if err := table.ValidateTable(); err != nil {
log.Errorf(context.TODO(), "%s: received invalid table descriptor: %v", kv.Key, table)
continue
}
// Keep track of outstanding schema changes.
// If all schema change commands always set UpVersion, why
// check for the presence of mutations?
// A schema change execution might fail soon after
// unsetting UpVersion, and we still want to process
// outstanding mutations. Similar with a table marked for deletion.
if table.UpVersion || table.Dropped() || table.Adding() ||
table.Renamed() || len(table.Mutations) > 0 {
if log.V(2) {
log.Infof(context.TODO(), "%s: queue up pending schema change; table: %d, version: %d",
kv.Key, table.ID, table.Version)
}
// Only track the first schema change. We depend on
// gossip to renotify us when a schema change has been
// completed.
schemaChanger.tableID = table.ID
if len(table.Mutations) == 0 {
schemaChanger.mutationID = sqlbase.InvalidMutationID
} else {
schemaChanger.mutationID = table.Mutations[0].MutationID
}
schemaChanger.execAfter = execAfter
// Keep track of this schema change.
// Remove from oldSchemaChangers map.
delete(oldSchemaChangers, table.ID)
if sc, ok := s.schemaChangers[table.ID]; ok {
if sc.mutationID == schemaChanger.mutationID {
// Ignore duplicate.
continue
}
}
s.schemaChangers[table.ID] = schemaChanger
}
case *sqlbase.Descriptor_Database:
// Ignore.
}
}
// Delete old schema changers.
for k := range oldSchemaChangers {
delete(s.schemaChangers, k)
}
timer = s.newTimer()
case <-timer.C:
if s.testingKnobs.AsyncExecNotification != nil &&
s.testingKnobs.AsyncExecNotification() != nil {
timer = s.newTimer()
continue
}
for tableID, sc := range s.schemaChangers {
if timeutil.Since(sc.execAfter) > 0 {
err := sc.exec()
if err != nil {
if err == errExistingSchemaChangeLease {
} else if err == sqlbase.ErrDescriptorNotFound {
// Someone deleted this table. Don't try to run the schema
// changer again. Note that there's no gossip update for the
// deletion which would remove this schemaChanger.
delete(s.schemaChangers, tableID)
} else {
// We don't need to act on integrity
// constraints violations because exec()
// purges mutations that violate integrity
// constraints.
log.Warningf(context.TODO(), "Error executing schema change: %s", err)
}
}
// Advance the execAfter time so that this schema
// changer doesn't get called again for a while.
sc.execAfter = timeutil.Now().Add(delay)
}
// Only attempt to run one schema changer.
break
}
timer = s.newTimer()
case <-stopper.ShouldStop():
return
}
}
})
}
func testDecimalDoubleArgFunc(
t *testing.T,
f func(*inf.Dec, *inf.Dec, *inf.Dec, inf.Scale) (*inf.Dec, error),
s inf.Scale,
tests []decimalTwoArgsTestCase,
) {
for _, tc := range tests {
t.Run(fmt.Sprintf("%s, %s = %s", tc.input1, tc.input2, tc.expected), func(t *testing.T) {
x, y, exp := new(inf.Dec), new(inf.Dec), new(inf.Dec)
if _, ok := x.SetString(tc.input1); !ok {
t.Fatalf("could not set decimal: %s", tc.input1)
}
if _, ok := y.SetString(tc.input2); !ok {
t.Fatalf("could not set decimal: %s", tc.input2)
}
// Test allocated return value.
var z *inf.Dec
var err error
done := make(chan struct{}, 1)
start := timeutil.Now()
go func() {
z, err = f(nil, x, y, s)
done <- struct{}{}
}()
var after <-chan time.Time
if *flagDurationLimit > 0 {
after = time.After(*flagDurationLimit)
}
select {
case <-done:
t.Logf("execute duration: %s", timeutil.Since(start))
case <-after:
t.Fatalf("timedout after %s", *flagDurationLimit)
}
if err != nil {
if tc.expected != err.Error() {
t.Errorf("expected error %s, got %s", tc.expected, err)
}
return
}
if z == nil {
if tc.expected != "nil" {
t.Errorf("expected %s, got nil", tc.expected)
}
return
} else if tc.expected == "nil" {
t.Errorf("expected nil, got %s", z)
return
}
if _, ok := exp.SetString(tc.expected); !ok {
t.Errorf("could not set decimal: %s", tc.expected)
return
}
if exp.Cmp(z) != 0 {
t.Errorf("expected %s, got %s", exp, z)
}
// Test provided decimal mutation.
z.SetString("0.0")
_, _ = f(z, x, y, s)
if exp.Cmp(z) != 0 {
t.Errorf("expected %s, got %s", exp, z)
}
// Test first arg mutation.
_, _ = f(x, x, y, s)
if exp.Cmp(x) != 0 {
t.Errorf("expected %s, got %s", exp, x)
}
x.SetString(tc.input1)
// Test second arg mutation.
_, _ = f(y, x, y, s)
if exp.Cmp(y) != 0 {
t.Errorf("expected %s, got %s", exp, y)
}
y.SetString(tc.input2)
// Test both arg mutation, if possible.
if tc.input1 == tc.input2 {
_, _ = f(x, x, x, s)
if exp.Cmp(x) != 0 {
t.Errorf("expected %s, got %s", exp, x)
}
x.SetString(tc.input1)
}
})
}
}
// Start starts the server on the specified port, starts gossip and initializes
// the node using the engines from the server's context.
//
// The passed context can be used to trace the server startup. The context
// should represent the general startup operation.
func (s *Server) Start(ctx context.Context) error {
ctx = s.AnnotateCtx(ctx)
startTime := timeutil.Now()
tlsConfig, err := s.cfg.GetServerTLSConfig()
if err != nil {
return err
}
httpServer := netutil.MakeServer(s.stopper, tlsConfig, s)
plainRedirectServer := netutil.MakeServer(s.stopper, tlsConfig, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
http.Redirect(w, r, "https://"+r.Host+r.RequestURI, http.StatusPermanentRedirect)
}))
// The following code is a specialization of util/net.go's ListenAndServe
// which adds pgwire support. A single port is used to serve all protocols
// (pg, http, h2) via the following construction:
//
// non-TLS case:
// net.Listen -> cmux.New
// |
// - -> pgwire.Match -> pgwire.Server.ServeConn
// - -> cmux.Any -> grpc.(*Server).Serve
//
// TLS case:
// net.Listen -> cmux.New
// |
// - -> pgwire.Match -> pgwire.Server.ServeConn
// - -> cmux.Any -> grpc.(*Server).Serve
//
// Note that the difference between the TLS and non-TLS cases exists due to
// Go's lack of an h2c (HTTP2 Clear Text) implementation. See inline comments
// in util.ListenAndServe for an explanation of how h2c is implemented there
// and here.
ln, err := net.Listen("tcp", s.cfg.Addr)
if err != nil {
return err
}
log.Eventf(ctx, "listening on port %s", s.cfg.Addr)
unresolvedListenAddr, err := officialAddr(s.cfg.Addr, ln.Addr())
if err != nil {
return err
}
s.cfg.Addr = unresolvedListenAddr.String()
unresolvedAdvertAddr, err := officialAddr(s.cfg.AdvertiseAddr, ln.Addr())
if err != nil {
return err
}
s.cfg.AdvertiseAddr = unresolvedAdvertAddr.String()
s.rpcContext.SetLocalInternalServer(s.node)
m := cmux.New(ln)
pgL := m.Match(pgwire.Match)
anyL := m.Match(cmux.Any())
httpLn, err := net.Listen("tcp", s.cfg.HTTPAddr)
if err != nil {
return err
}
unresolvedHTTPAddr, err := officialAddr(s.cfg.HTTPAddr, httpLn.Addr())
if err != nil {
return err
}
s.cfg.HTTPAddr = unresolvedHTTPAddr.String()
workersCtx := s.AnnotateCtx(context.Background())
s.stopper.RunWorker(func() {
<-s.stopper.ShouldQuiesce()
if err := httpLn.Close(); err != nil {
log.Fatal(workersCtx, err)
}
})
if tlsConfig != nil {
httpMux := cmux.New(httpLn)
clearL := httpMux.Match(cmux.HTTP1())
tlsL := httpMux.Match(cmux.Any())
s.stopper.RunWorker(func() {
netutil.FatalIfUnexpected(httpMux.Serve())
})
s.stopper.RunWorker(func() {
netutil.FatalIfUnexpected(plainRedirectServer.Serve(clearL))
})
httpLn = tls.NewListener(tlsL, tlsConfig)
}
s.stopper.RunWorker(func() {
netutil.FatalIfUnexpected(httpServer.Serve(httpLn))
})
s.stopper.RunWorker(func() {
<-s.stopper.ShouldQuiesce()
netutil.FatalIfUnexpected(anyL.Close())
<-s.stopper.ShouldStop()
s.grpc.Stop()
})
s.stopper.RunWorker(func() {
netutil.FatalIfUnexpected(s.grpc.Serve(anyL))
})
s.stopper.RunWorker(func() {
pgCtx := s.pgServer.AmbientCtx.AnnotateCtx(context.Background())
netutil.FatalIfUnexpected(httpServer.ServeWith(s.stopper, pgL, func(conn net.Conn) {
connCtx := log.WithLogTagStr(pgCtx, "client", conn.RemoteAddr().String())
if err := s.pgServer.ServeConn(connCtx, conn); err != nil && !netutil.IsClosedConnection(err) {
// Report the error on this connection's context, so that we
// know which remote client caused the error when looking at
// the logs.
log.Error(connCtx, err)
}
}))
})
if len(s.cfg.SocketFile) != 0 {
// Unix socket enabled: postgres protocol only.
unixLn, err := net.Listen("unix", s.cfg.SocketFile)
if err != nil {
return err
}
s.stopper.RunWorker(func() {
<-s.stopper.ShouldQuiesce()
if err := unixLn.Close(); err != nil {
log.Fatal(workersCtx, err)
}
})
s.stopper.RunWorker(func() {
pgCtx := s.pgServer.AmbientCtx.AnnotateCtx(context.Background())
netutil.FatalIfUnexpected(httpServer.ServeWith(s.stopper, unixLn, func(conn net.Conn) {
connCtx := log.WithLogTagStr(pgCtx, "client", conn.RemoteAddr().String())
if err := s.pgServer.ServeConn(connCtx, conn); err != nil && !netutil.IsClosedConnection(err) {
// Report the error on this connection's context, so that we
// know which remote client caused the error when looking at
// the logs.
log.Error(connCtx, err)
}
}))
})
}
// Enable the debug endpoints first to provide an earlier window
// into what's going on with the node in advance of exporting node
// functionality.
// TODO(marc): when cookie-based authentication exists,
// apply it for all web endpoints.
s.mux.HandleFunc(debugEndpoint, http.HandlerFunc(handleDebug))
s.gossip.Start(unresolvedAdvertAddr)
log.Event(ctx, "started gossip")
s.engines, err = s.cfg.CreateEngines()
if err != nil {
return errors.Wrap(err, "failed to create engines")
}
s.stopper.AddCloser(&s.engines)
// We might have to sleep a bit to protect against this node producing non-
// monotonic timestamps. Before restarting, its clock might have been driven
// by other nodes' fast clocks, but when we restarted, we lost all this
// information. For example, a client might have written a value at a
// timestamp that's in the future of the restarted node's clock, and if we
// don't do something, the same client's read would not return the written
// value. So, we wait up to MaxOffset; we couldn't have served timestamps more
// than MaxOffset in the future (assuming that MaxOffset was not changed, see
// #9733).
//
// As an optimization for tests, we don't sleep if all the stores are brand
// new. In this case, the node will not serve anything anyway until it
// synchronizes with other nodes.
{
anyStoreBootstrapped := false
for _, e := range s.engines {
if _, err := storage.ReadStoreIdent(ctx, e); err != nil {
// NotBootstrappedError is expected.
if _, ok := err.(*storage.NotBootstrappedError); !ok {
return err
}
} else {
anyStoreBootstrapped = true
break
}
}
if anyStoreBootstrapped {
sleepDuration := s.clock.MaxOffset() - timeutil.Since(startTime)
if sleepDuration > 0 {
log.Infof(ctx, "sleeping for %s to guarantee HLC monotonicity", sleepDuration)
time.Sleep(sleepDuration)
}
}
}
// Now that we have a monotonic HLC wrt previous incarnations of the process,
// init all the replicas.
err = s.node.start(
ctx,
unresolvedAdvertAddr,
s.engines,
s.cfg.NodeAttributes,
s.cfg.Locality,
)
if err != nil {
return err
}
log.Event(ctx, "started node")
s.nodeLiveness.StartHeartbeat(ctx, s.stopper)
// We can now add the node registry.
s.recorder.AddNode(s.registry, s.node.Descriptor, s.node.startedAt)
// Begin recording runtime statistics.
s.startSampleEnvironment(s.cfg.MetricsSampleInterval)
// Begin recording time series data collected by the status monitor.
s.tsDB.PollSource(
s.cfg.AmbientCtx, s.recorder, s.cfg.MetricsSampleInterval, ts.Resolution10s, s.stopper,
)
// Begin recording status summaries.
s.node.startWriteSummaries(s.cfg.MetricsSampleInterval)
// Create and start the schema change manager only after a NodeID
// has been assigned.
testingKnobs := &sql.SchemaChangerTestingKnobs{}
if s.cfg.TestingKnobs.SQLSchemaChanger != nil {
testingKnobs = s.cfg.TestingKnobs.SQLSchemaChanger.(*sql.SchemaChangerTestingKnobs)
}
sql.NewSchemaChangeManager(testingKnobs, *s.db, s.gossip, s.leaseMgr).Start(s.stopper)
s.distSQLServer.Start()
log.Infof(ctx, "starting %s server at %s", s.cfg.HTTPRequestScheme(), unresolvedHTTPAddr)
log.Infof(ctx, "starting grpc/postgres server at %s", unresolvedListenAddr)
log.Infof(ctx, "advertising CockroachDB node at %s", unresolvedAdvertAddr)
if len(s.cfg.SocketFile) != 0 {
log.Infof(ctx, "starting postgres server at unix:%s", s.cfg.SocketFile)
}
s.stopper.RunWorker(func() {
netutil.FatalIfUnexpected(m.Serve())
})
log.Event(ctx, "accepting connections")
// Initialize grpc-gateway mux and context.
jsonpb := &protoutil.JSONPb{
EnumsAsInts: true,
EmitDefaults: true,
Indent: " ",
}
protopb := new(protoutil.ProtoPb)
gwMux := gwruntime.NewServeMux(
gwruntime.WithMarshalerOption(gwruntime.MIMEWildcard, jsonpb),
gwruntime.WithMarshalerOption(httputil.JSONContentType, jsonpb),
gwruntime.WithMarshalerOption(httputil.AltJSONContentType, jsonpb),
gwruntime.WithMarshalerOption(httputil.ProtoContentType, protopb),
gwruntime.WithMarshalerOption(httputil.AltProtoContentType, protopb),
)
gwCtx, gwCancel := context.WithCancel(s.AnnotateCtx(context.Background()))
s.stopper.AddCloser(stop.CloserFn(gwCancel))
// Setup HTTP<->gRPC handlers.
conn, err := s.rpcContext.GRPCDial(s.cfg.Addr)
if err != nil {
return errors.Errorf("error constructing grpc-gateway: %s; are your certificates valid?", err)
}
for _, gw := range []grpcGatewayServer{s.admin, s.status, &s.tsServer} {
if err := gw.RegisterGateway(gwCtx, gwMux, conn); err != nil {
return err
}
}
var uiFileSystem http.FileSystem
uiDebug := envutil.EnvOrDefaultBool("COCKROACH_DEBUG_UI", false)
if uiDebug {
uiFileSystem = http.Dir("pkg/ui")
} else {
uiFileSystem = &assetfs.AssetFS{
Asset: ui.Asset,
AssetDir: ui.AssetDir,
AssetInfo: ui.AssetInfo,
}
}
uiFileServer := http.FileServer(uiFileSystem)
s.mux.HandleFunc("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/" {
if uiDebug {
r.URL.Path = "debug.html"
} else {
r.URL.Path = "release.html"
}
}
uiFileServer.ServeHTTP(w, r)
}))
// TODO(marc): when cookie-based authentication exists,
// apply it for all web endpoints.
s.mux.Handle(adminPrefix, gwMux)
s.mux.Handle(ts.URLPrefix, gwMux)
s.mux.Handle(statusPrefix, gwMux)
s.mux.Handle("/health", gwMux)
s.mux.Handle(statusVars, http.HandlerFunc(s.status.handleVars))
log.Event(ctx, "added http endpoints")
if err := sdnotify.Ready(); err != nil {
log.Errorf(ctx, "failed to signal readiness using systemd protocol: %s", err)
}
log.Event(ctx, "server ready")
return nil
}
// applySnapshot updates the replica based on the given snapshot and associated
// HardState (which may be empty, as Raft may apply some snapshots which don't
// require an update to the HardState). All snapshots must pass through Raft
// for correctness, i.e. the parameters to this method must be taken from
// a raft.Ready. It is the caller's responsibility to call
// r.store.processRangeDescriptorUpdate(r) after a successful applySnapshot.
func (r *Replica) applySnapshot(
ctx context.Context, inSnap IncomingSnapshot, snap raftpb.Snapshot, hs raftpb.HardState,
) error {
// Extract the updated range descriptor.
desc := inSnap.RangeDescriptor
r.mu.Lock()
replicaID := r.mu.replicaID
raftLogSize := r.mu.raftLogSize
r.mu.Unlock()
isPreemptive := replicaID == 0 // only used for accounting and log format
var appliedSuccessfully bool
defer func() {
if appliedSuccessfully {
if !isPreemptive {
r.store.metrics.RangeSnapshotsNormalApplied.Inc(1)
} else {
r.store.metrics.RangeSnapshotsPreemptiveApplied.Inc(1)
}
}
}()
if raft.IsEmptySnap(snap) {
// Raft discarded the snapshot, indicating that our local state is
// already ahead of what the snapshot provides. But we count it for
// stats (see the defer above).
appliedSuccessfully = true
return nil
}
snapType := "preemptive"
if !isPreemptive {
snapType = "Raft"
}
log.Infof(ctx, "applying %s snapshot at index %d "+
"(id=%s, encoded size=%d, %d rocksdb batches, %d log entries)",
snapType, snap.Metadata.Index, inSnap.SnapUUID.Short(),
len(snap.Data), len(inSnap.Batches), len(inSnap.LogEntries))
defer func(start time.Time) {
log.Infof(ctx, "applied %s snapshot in %.3fs",
snapType, timeutil.Since(start).Seconds())
}(timeutil.Now())
batch := r.store.Engine().NewBatch()
defer batch.Close()
// Clear the range using a distinct batch in order to prevent the iteration
// from forcing the batch to flush from Go to C++.
distinctBatch := batch.Distinct()
// Delete everything in the range and recreate it from the snapshot.
// We need to delete any old Raft log entries here because any log entries
// that predate the snapshot will be orphaned and never truncated or GC'd.
iter := NewReplicaDataIterator(&desc, distinctBatch, false /* !replicatedOnly */)
defer iter.Close()
for ; iter.Valid(); iter.Next() {
if err := distinctBatch.Clear(iter.Key()); err != nil {
return err
}
}
distinctBatch.Close()
// Write the snapshot into the range.
for _, batchRepr := range inSnap.Batches {
if err := batch.ApplyBatchRepr(batchRepr); err != nil {
return err
}
}
// The log entries are all written to distinct keys so we can use a
// distinct batch.
distinctBatch = batch.Distinct()
logEntries := make([]raftpb.Entry, len(inSnap.LogEntries))
for i, bytes := range inSnap.LogEntries {
if err := logEntries[i].Unmarshal(bytes); err != nil {
return err
}
}
// Write the snapshot's Raft log into the range.
_, raftLogSize, err := r.append(ctx, distinctBatch, 0, raftLogSize, logEntries)
if err != nil {
return err
}
if !raft.IsEmptyHardState(hs) {
if err := setHardState(ctx, distinctBatch, r.RangeID, hs); err != nil {
return errors.Wrapf(err, "unable to persist HardState %+v", &hs)
}
} else {
// Note that we don't require that Raft supply us with a nonempty
// HardState on a snapshot. We don't want to make that assumption
// because it's not guaranteed by the contract. Raft *must* send us
// a HardState when it increases the committed index as a result of the
// snapshot, but who is to say it isn't going to accept a snapshot
// which is identical to the current state?
}
// We need to close the distinct batch and start using the normal batch for
// the read below.
distinctBatch.Close()
s, err := loadState(ctx, batch, &desc)
if err != nil {
return err
}
if s.Desc.RangeID != r.RangeID {
log.Fatalf(ctx, "unexpected range ID %d", s.Desc.RangeID)
}
// As outlined above, last and applied index are the same after applying
// the snapshot (i.e. the snapshot has no uncommitted tail).
if s.RaftAppliedIndex != snap.Metadata.Index {
log.Fatalf(ctx, "snapshot RaftAppliedIndex %d doesn't match its metadata index %d",
s.RaftAppliedIndex, snap.Metadata.Index)
}
if err := batch.Commit(); err != nil {
return err
}
r.mu.Lock()
// We set the persisted last index to the last applied index. This is
// not a correctness issue, but means that we may have just transferred
// some entries we're about to re-request from the leader and overwrite.
// However, raft.MultiNode currently expects this behaviour, and the
// performance implications are not likely to be drastic. If our
// feelings about this ever change, we can add a LastIndex field to
// raftpb.SnapshotMetadata.
r.mu.lastIndex = s.RaftAppliedIndex
r.mu.raftLogSize = raftLogSize
// Update the range and store stats.
r.store.metrics.subtractMVCCStats(r.mu.state.Stats)
r.store.metrics.addMVCCStats(s.Stats)
r.mu.state = s
r.assertStateLocked(r.store.Engine())
r.mu.Unlock()
// As the last deferred action after committing the batch, update other
// fields which are uninitialized or need updating. This may not happen
// if the system config has not yet been loaded. While config update
// will correctly set the fields, there is no order guarantee in
// ApplySnapshot.
// TODO: should go through the standard store lock when adding a replica.
if err := r.updateRangeInfo(&desc); err != nil {
panic(err)
}
r.setDescWithoutProcessUpdate(&desc)
appliedSuccessfully = true
return nil
}
// processLoop processes the entries in the queue until the provided
// stopper signals exit.
func (bq *baseQueue) processLoop(clock *hlc.Clock, stopper *stop.Stopper) {
stopper.RunWorker(func() {
ctx := bq.AnnotateCtx(context.Background())
defer func() {
bq.mu.Lock()
bq.mu.stopped = true
bq.mu.Unlock()
bq.AmbientContext.FinishEventLog()
}()
// nextTime is initially nil; we don't start any timers until the queue
// becomes non-empty.
var nextTime <-chan time.Time
immediately := make(chan time.Time)
close(immediately)
for {
select {
// Exit on stopper.
case <-stopper.ShouldStop():
return
// Incoming signal sets the next time to process if there were previously
// no replicas in the queue.
case <-bq.incoming:
if nextTime == nil {
// When a replica is added, wake up immediately. This is mainly
// to facilitate testing without unnecessary sleeps.
nextTime = immediately
// In case we're in a test, still block on the impl.
bq.impl.timer(0)
}
// Process replicas as the timer expires.
case <-nextTime:
repl := bq.pop()
var duration time.Duration
if repl != nil {
if stopper.RunTask(func() {
annotatedCtx := repl.AnnotateCtx(ctx)
start := timeutil.Now()
if err := bq.processReplica(annotatedCtx, repl, clock); err != nil {
// Maybe add failing replica to purgatory if the queue supports it.
bq.maybeAddToPurgatory(annotatedCtx, repl, err, clock, stopper)
}
duration = timeutil.Since(start)
log.VEventf(annotatedCtx, 2, "done %s", duration)
bq.processingNanos.Inc(duration.Nanoseconds())
}) != nil {
return
}
}
if bq.Length() == 0 {
nextTime = nil
} else {
nextTime = time.After(bq.impl.timer(duration))
}
}
}
})
}
func testSingleKeyInner(
ctx context.Context, t *testing.T, c cluster.Cluster, cfg cluster.TestConfig,
) {
num := c.NumNodes()
// Initialize the value for our test key to zero.
const key = "test-key"
initDB := c.NewClient(ctx, t, 0)
if err := initDB.Put(ctx, key, 0); err != nil {
t.Fatal(err)
}
type result struct {
err error
maxLatency time.Duration
}
resultCh := make(chan result, num)
deadline := timeutil.Now().Add(cfg.Duration)
var expected int64
// Start up num workers each reading and writing the same
// key. Each worker is configured to talk to a different node in the
// cluster.
for i := 0; i < num; i++ {
db := c.NewClient(ctx, t, i)
go func() {
var r result
for timeutil.Now().Before(deadline) {
start := timeutil.Now()
err := db.Txn(ctx, func(txn *client.Txn) error {
minExp := atomic.LoadInt64(&expected)
r, err := txn.Get(key)
if err != nil {
return err
}
b := txn.NewBatch()
v := r.ValueInt()
b.Put(key, v+1)
err = txn.CommitInBatch(b)
// Atomic updates after the fact mean that we should read
// exp or larger (since concurrent writers might have
// committed but not yet performed their atomic update).
if err == nil && v < minExp {
return errors.Errorf("unexpected read: %d, expected >= %d", v, minExp)
}
return err
})
if err != nil {
resultCh <- result{err: err}
return
}
atomic.AddInt64(&expected, 1)
latency := timeutil.Since(start)
if r.maxLatency < latency {
r.maxLatency = latency
}
}
resultCh <- r
}()
}
// Verify that none of the workers encountered an error.
var results []result
for len(results) < num {
select {
case <-stopper.ShouldStop():
t.Fatalf("interrupted")
case r := <-resultCh:
if r.err != nil {
t.Fatal(r.err)
}
results = append(results, r)
case <-time.After(1 * time.Second):
// Periodically print out progress so that we know the test is still
// running.
log.Infof(ctx, "%d", atomic.LoadInt64(&expected))
}
}
// Verify the resulting value stored at the key is what we expect.
r, err := initDB.Get(ctx, key)
if err != nil {
t.Fatal(err)
}
v := r.ValueInt()
if expected != v {
t.Fatalf("expected %d, but found %d", expected, v)
}
var maxLatency []time.Duration
for _, r := range results {
maxLatency = append(maxLatency, r.maxLatency)
}
log.Infof(ctx, "%d increments: %s", v, maxLatency)
}
// Run a particular schema change and run some OLTP operations in parallel, as
// soon as the schema change starts executing its backfill.
func runSchemaChangeWithOperations(
t *testing.T,
sqlDB *gosql.DB,
kvDB *client.DB,
schemaChange string,
maxValue int,
keyMultiple int,
backfillNotification chan bool,
) {
tableDesc := sqlbase.GetTableDescriptor(kvDB, "t", "test")
// Run the schema change in a separate goroutine.
var wg sync.WaitGroup
wg.Add(1)
go func() {
start := timeutil.Now()
// Start schema change that eventually runs a backfill.
if _, err := sqlDB.Exec(schemaChange); err != nil {
t.Error(err)
}
t.Logf("schema change %s took %v", schemaChange, timeutil.Since(start))
wg.Done()
}()
// Wait until the schema change backfill starts.
<-backfillNotification
// Run a variety of operations during the backfill.
// Grabbing a schema change lease on the table will fail, disallowing
// another schema change from being simultaneously executed.
sc := csql.NewSchemaChangerForTesting(tableDesc.ID, 0, 0, *kvDB, nil)
if l, err := sc.AcquireLease(); err == nil {
t.Fatalf("schema change lease acquisition on table %d succeeded: %v", tableDesc.ID, l)
}
// Update some rows.
var updatedKeys []int
for i := 0; i < 10; i++ {
k := rand.Intn(maxValue)
v := maxValue + i + 1
if _, err := sqlDB.Exec(`UPDATE t.test SET v = $1 WHERE k = $2`, v, k); err != nil {
t.Error(err)
}
updatedKeys = append(updatedKeys, k)
}
// Reupdate updated values back to what they were before.
for _, k := range updatedKeys {
if _, err := sqlDB.Exec(`UPDATE t.test SET v = $1 WHERE k = $2`, maxValue-k, k); err != nil {
t.Error(err)
}
}
// Delete some rows.
deleteStartKey := rand.Intn(maxValue - 10)
for i := 0; i < 10; i++ {
if _, err := sqlDB.Exec(`DELETE FROM t.test WHERE k = $1`, deleteStartKey+i); err != nil {
t.Error(err)
}
}
// Reinsert deleted rows.
for i := 0; i < 10; i++ {
k := deleteStartKey + i
if _, err := sqlDB.Exec(`INSERT INTO t.test VALUES($1, $2)`, k, maxValue-k); err != nil {
t.Error(err)
}
}
// Insert some new rows.
numInserts := 10
for i := 0; i < numInserts; i++ {
k := maxValue + i + 1
if _, err := sqlDB.Exec(`INSERT INTO t.test VALUES($1, $1)`, k); err != nil {
t.Error(err)
}
}
wg.Wait() // for schema change to complete.
// Verify the number of keys left behind in the table to validate schema
// change operations.
tablePrefix := roachpb.Key(keys.MakeTablePrefix(uint32(tableDesc.ID)))
tableEnd := tablePrefix.PrefixEnd()
if kvs, err := kvDB.Scan(context.TODO(), tablePrefix, tableEnd, 0); err != nil {
t.Fatal(err)
} else if e := keyMultiple * (maxValue + numInserts + 1); len(kvs) != e {
for _, kv := range kvs {
t.Errorf("key %s, value %s", kv.Key, kv.Value)
}
t.Fatalf("expected %d key value pairs, but got %d", e, len(kvs))
}
// Delete the rows inserted.
for i := 0; i < numInserts; i++ {
if _, err := sqlDB.Exec(`DELETE FROM t.test WHERE k = $1`, maxValue+i+1); err != nil {
t.Error(err)
}
}
}
func (n *Node) batchInternal(
ctx context.Context, args *roachpb.BatchRequest,
) (*roachpb.BatchResponse, error) {
// TODO(marc): grpc's authentication model (which gives credential access in
// the request handler) doesn't really fit with the current design of the
// security package (which assumes that TLS state is only given at connection
// time) - that should be fixed.
if peer, ok := peer.FromContext(ctx); ok {
if tlsInfo, ok := peer.AuthInfo.(credentials.TLSInfo); ok {
certUser, err := security.GetCertificateUser(&tlsInfo.State)
if err != nil {
return nil, err
}
if certUser != security.NodeUser {
return nil, errors.Errorf("user %s is not allowed", certUser)
}
}
}
var br *roachpb.BatchResponse
type snowballInfo struct {
syncutil.Mutex
collectedSpans [][]byte
done bool
}
var snowball *snowballInfo
if err := n.stopper.RunTaskWithErr(func() error {
const opName = "node.Batch"
sp, err := tracing.JoinOrNew(n.storeCfg.AmbientCtx.Tracer, args.TraceContext, opName)
if err != nil {
return err
}
// If this is a snowball span, it gets special treatment: It skips the
// regular tracing machinery, and we instead send the collected spans
// back with the response. This is more expensive, but then again,
// those are individual requests traced by users, so they can be.
if sp.BaggageItem(tracing.Snowball) != "" {
sp.LogEvent("delegating to snowball tracing")
sp.Finish()
snowball = new(snowballInfo)
recorder := func(rawSpan basictracer.RawSpan) {
snowball.Lock()
defer snowball.Unlock()
if snowball.done {
// This is a late span that we must discard because the request was
// already completed.
return
}
encSp, err := tracing.EncodeRawSpan(&rawSpan, nil)
if err != nil {
log.Warning(ctx, err)
}
snowball.collectedSpans = append(snowball.collectedSpans, encSp)
}
if sp, err = tracing.JoinOrNewSnowball(opName, args.TraceContext, recorder); err != nil {
return err
}
}
defer sp.Finish()
traceCtx := opentracing.ContextWithSpan(ctx, sp)
log.Event(traceCtx, args.Summary())
tStart := timeutil.Now()
var pErr *roachpb.Error
br, pErr = n.stores.Send(traceCtx, *args)
if pErr != nil {
br = &roachpb.BatchResponse{}
log.ErrEventf(traceCtx, "%T", pErr.GetDetail())
}
if br.Error != nil {
panic(roachpb.ErrorUnexpectedlySet(n.stores, br))
}
n.metrics.callComplete(timeutil.Since(tStart), pErr)
br.Error = pErr
return nil
}); err != nil {
return nil, err
}
if snowball != nil {
snowball.Lock()
br.CollectedSpans = snowball.collectedSpans
snowball.done = true
snowball.Unlock()
}
return br, nil
}
func (rq *replicateQueue) canTransferLease() bool {
if lastLeaseTransfer := rq.lastLeaseTransfer.Load(); lastLeaseTransfer != nil {
return timeutil.Since(lastLeaseTransfer.(time.Time)) > minLeaseTransferInterval
}
return true
}
// snapshot creates an OutgoingSnapshot containing a rocksdb snapshot for the given range.
func snapshot(
ctx context.Context,
snap engine.Reader,
rangeID roachpb.RangeID,
eCache *raftEntryCache,
startKey roachpb.RKey,
) (OutgoingSnapshot, error) {
start := timeutil.Now()
var desc roachpb.RangeDescriptor
// We ignore intents on the range descriptor (consistent=false) because we
// know they cannot be committed yet; operations that modify range
// descriptors resolve their own intents when they commit.
ok, err := engine.MVCCGetProto(ctx, snap, keys.RangeDescriptorKey(startKey),
hlc.MaxTimestamp, false /* !consistent */, nil, &desc)
if err != nil {
return OutgoingSnapshot{}, errors.Errorf("failed to get desc: %s", err)
}
if !ok {
return OutgoingSnapshot{}, errors.Errorf("couldn't find range descriptor")
}
var snapData roachpb.RaftSnapshotData
// Store RangeDescriptor as metadata, it will be retrieved by ApplySnapshot()
snapData.RangeDescriptor = desc
// Read the range metadata from the snapshot instead of the members
// of the Range struct because they might be changed concurrently.
appliedIndex, _, err := loadAppliedIndex(ctx, snap, rangeID)
if err != nil {
return OutgoingSnapshot{}, err
}
// Synthesize our raftpb.ConfState from desc.
var cs raftpb.ConfState
for _, rep := range desc.Replicas {
cs.Nodes = append(cs.Nodes, uint64(rep.ReplicaID))
}
term, err := term(ctx, snap, rangeID, eCache, appliedIndex)
if err != nil {
return OutgoingSnapshot{}, errors.Errorf("failed to fetch term of %d: %s", appliedIndex, err)
}
// Intentionally let this iterator and the snapshot escape so that the
// streamer can send chunks from it bit by bit.
iter := NewReplicaDataIterator(&desc, snap, true /* replicatedOnly */)
snapUUID := uuid.NewV4()
log.Infof(ctx, "generated snapshot %s for range %s at index %d in %s.",
snapUUID.Short(), rangeID, appliedIndex, timeutil.Since(start))
return OutgoingSnapshot{
EngineSnap: snap,
Iter: iter,
SnapUUID: *snapUUID,
RaftSnap: raftpb.Snapshot{
Data: snapUUID.GetBytes(),
Metadata: raftpb.SnapshotMetadata{
Index: appliedIndex,
Term: term,
ConfState: cs,
},
},
}, nil
}
