// TestCoordinatorGC verifies that the coordinator cleans up extant
// transactions after the lastUpdateTS exceeds the timeout.
func TestCoordinatorGC(t *testing.T) {
db, _, manual := createTestDB(t)
defer db.Close()
// Set heartbeat interval to 1ms for testing.
db.coordinator.heartbeatInterval = 1 * time.Millisecond
txnID := engine.Key("txn")
<-db.Put(createPutRequest(engine.Key("a"), []byte("value"), txnID))
// Now, advance clock past the default client timeout.
// Locking the coordinator to prevent a data race.
db.coordinator.Lock()
*manual = hlc.ManualClock(defaultClientTimeout.Nanoseconds() + 1)
db.coordinator.Unlock()
if err := util.IsTrueWithin(func() bool {
// Locking the coordinator to prevent a data race.
db.coordinator.Lock()
_, ok := db.coordinator.txns[string(txnID)]
db.coordinator.Unlock()
return !ok
}, 50*time.Millisecond); err != nil {
t.Error("expected garbage collection")
}
}
// TestRangeGossipConfigUpdates verifies that writes to the
// permissions cause the updated configs to be re-gossipped.
func TestRangeGossipConfigUpdates(t *testing.T) {
r, g := createTestRange(createTestEngine(t), t)
defer r.Stop()
// Add a permission for a new key prefix.
db1Perm := proto.PermConfig{
Read: []string{"spencer"},
Write: []string{"spencer"},
}
key := engine.MakeKey(engine.KeyConfigPermissionPrefix, engine.Key("/db1"))
reply := &proto.PutResponse{}
data, err := gogoproto.Marshal(&db1Perm)
if err != nil {
t.Fatal(err)
}
r.Put(&proto.PutRequest{RequestHeader: proto.RequestHeader{Key: key}, Value: proto.Value{Bytes: data}}, reply)
if reply.Error != nil {
t.Fatal(reply.GoError())
}
info, err := g.GetInfo(gossip.KeyConfigPermission)
if err != nil {
t.Fatal(err)
}
configMap := info.(PrefixConfigMap)
expConfigs := []*PrefixConfig{
&PrefixConfig{engine.KeyMin, nil, &testDefaultPermConfig},
&PrefixConfig{engine.Key("/db1"), nil, &db1Perm},
&PrefixConfig{engine.Key("/db2"), engine.KeyMin, &testDefaultPermConfig},
}
if !reflect.DeepEqual([]*PrefixConfig(configMap), expConfigs) {
t.Errorf("expected gossiped configs to be equal %s vs %s", configMap, expConfigs)
}
}
func TestReadQueueMultipleReads(t *testing.T) {
rq := NewReadQueue()
wg1 := sync.WaitGroup{}
wg2 := sync.WaitGroup{}
wg3 := sync.WaitGroup{}
// Add a write which will overlap all reads.
wk := rq.AddWrite(engine.Key("a"), engine.Key("d"))
rq.AddRead(engine.Key("a"), nil, &wg1)
rq.AddRead(engine.Key("b"), nil, &wg2)
rq.AddRead(engine.Key("c"), nil, &wg3)
rd1 := waitForReader(&wg1)
rd2 := waitForReader(&wg2)
rd3 := waitForReader(&wg3)
if testReadDone(rd1, 1*time.Millisecond) ||
testReadDone(rd2, 1*time.Millisecond) ||
testReadDone(rd3, 1*time.Millisecond) {
t.Fatal("no reads should finish with write outstanding")
}
rq.RemoveWrite(wk)
if !testReadDone(rd1, 5*time.Millisecond) ||
!testReadDone(rd2, 5*time.Millisecond) ||
!testReadDone(rd3, 5*time.Millisecond) {
t.Fatal("reads should finish with no writes outstanding")
}
}
func TestGetFirstRangeDescriptor(t *testing.T) {
n := gossip.NewSimulationNetwork(3, "unix", gossip.DefaultTestGossipInterval)
kv := NewDistKV(n.Nodes[0].Gossip)
if _, err := kv.getFirstRangeDescriptor(); err == nil {
t.Errorf("expected not to find first range descriptor")
}
expectedDesc := &proto.RangeDescriptor{}
expectedDesc.StartKey = engine.Key("a")
expectedDesc.EndKey = engine.Key("c")
// Add first RangeDescriptor to a node different from the node for this kv
// and ensure that this kv has the information within a given time.
n.Nodes[1].Gossip.AddInfo(
gossip.KeyFirstRangeMetadata, *expectedDesc, time.Hour)
maxCycles := 10
n.SimulateNetwork(func(cycle int, network *gossip.SimulationNetwork) bool {
desc, err := kv.getFirstRangeDescriptor()
if err != nil {
if cycle >= maxCycles {
t.Errorf("could not get range descriptor after %d cycles", cycle)
return false
}
return true
}
if !bytes.Equal(desc.StartKey, expectedDesc.StartKey) ||
!bytes.Equal(desc.EndKey, expectedDesc.EndKey) {
t.Errorf("expected first range descriptor %v, instead was %v",
expectedDesc, desc)
}
return false
})
n.Stop()
}
// TestRangeGossipConfigWithMultipleKeyPrefixes verifies that multiple
// key prefixes for a config are gossipped.
func TestRangeGossipConfigWithMultipleKeyPrefixes(t *testing.T) {
e := createTestEngine(t)
// Add a permission for a new key prefix.
db1Perm := proto.PermConfig{
Read: []string{"spencer", "foo", "bar", "baz"},
Write: []string{"spencer"},
}
key := engine.MakeKey(engine.KeyConfigPermissionPrefix, engine.Key("/db1"))
if err := engine.PutProto(e, key, &db1Perm); err != nil {
t.Fatal(err)
}
r, g := createTestRange(e, t)
defer r.Stop()
info, err := g.GetInfo(gossip.KeyConfigPermission)
if err != nil {
t.Fatal(err)
}
configMap := info.(PrefixConfigMap)
expConfigs := []*PrefixConfig{
&PrefixConfig{engine.KeyMin, nil, &testDefaultPermConfig},
&PrefixConfig{engine.Key("/db1"), nil, &db1Perm},
&PrefixConfig{engine.Key("/db2"), engine.KeyMin, &testDefaultPermConfig},
}
if !reflect.DeepEqual([]*PrefixConfig(configMap), expConfigs) {
t.Errorf("expected gossiped configs to be equal %s vs %s", configMap, expConfigs)
}
}
// createTestStore creates a test store using an in-memory
// engine. Returns the store clock's manual unix nanos time and the
// store. If createDefaultRange is true, creates a single range from
// key "a" to key "z" with a default replica descriptor (i.e. StoreID
// = 0, RangeID = 1, etc.). The caller is responsible for closing the
// store on exit.
func createTestStore(createDefaultRange bool, t *testing.T) (*Store, *hlc.ManualClock) {
manual := hlc.ManualClock(0)
clock := hlc.NewClock(manual.UnixNano)
eng := engine.NewInMem(proto.Attributes{}, 1<<20)
store := NewStore(clock, eng, nil, nil)
if err := store.Bootstrap(proto.StoreIdent{StoreID: 1}); err != nil {
t.Fatal(err)
}
db, _ := newTestDB(store)
store.db = db
replica := proto.Replica{StoreID: 1, RangeID: 1}
// Create system key range for allocations.
meta := store.BootstrapRangeMetadata()
meta.StartKey = engine.KeySystemPrefix
meta.EndKey = engine.PrefixEndKey(engine.KeySystemPrefix)
_, err := store.CreateRange(meta)
if err != nil {
t.Fatal(err)
}
if err := store.Init(); err != nil {
t.Fatal(err)
}
// Now that the system key range is available, initialize the store. set store DB so new
// ranges can be allocated as needed for tests.
// If requested, create a default range for tests from "a"-"z".
if createDefaultRange {
replica = proto.Replica{StoreID: 1}
_, err := store.CreateRange(store.NewRangeMetadata(engine.Key("a"), engine.Key("z"), []proto.Replica{replica}))
if err != nil {
t.Fatal(err)
}
}
return store, &manual
}
// TestCoordinatorAddRequest verifies adding a request creates a
// transaction metadata and adding multiple requests with same
// transaction ID updates the last update timestamp.
func TestCoordinatorAddRequest(t *testing.T) {
db, clock, manual := createTestDB(t)
defer db.Close()
txnID := engine.Key("txn")
putReq := createPutRequest(engine.Key("a"), []byte("value"), txnID)
// Put request will create a new transaction.
<-db.Put(putReq)
txnMeta, ok := db.coordinator.txns[string(txnID)]
if !ok {
t.Fatal("expected a transaction to be created on coordinator")
}
ts := txnMeta.lastUpdateTS
if !ts.Less(clock.Now()) {
t.Errorf("expected earlier last update timestamp; got: %+v", ts)
}
// Advance time and send another put request.
// Locking the coordinator to prevent a data race.
db.coordinator.Lock()
*manual = hlc.ManualClock(1)
db.coordinator.Unlock()
<-db.Put(putReq)
if len(db.coordinator.txns) != 1 {
t.Errorf("expected length of transactions map to be 1; got %d", len(db.coordinator.txns))
}
txnMeta = db.coordinator.txns[string(txnID)]
if !ts.Less(txnMeta.lastUpdateTS) || txnMeta.lastUpdateTS.WallTime != int64(*manual) {
t.Errorf("expected last update time to advance; got %+v", txnMeta.lastUpdateTS)
}
}
// TestInternalPushTxnPushTimestamp verifies that with args.Abort is
// false (i.e. for read/write conflict), the pushed txn keeps status
// PENDING, but has its txn Timestamp moved forward to the pusher's
// txn Timestamp + 1.
func TestInternalPushTxnPushTimestamp(t *testing.T) {
rng, _, clock, _ := createTestRangeWithClock(t)
defer rng.Stop()
pusher := NewTransaction(engine.Key("a"), 1, proto.SERIALIZABLE, clock)
pushee := NewTransaction(engine.Key("b"), 1, proto.SERIALIZABLE, clock)
pusher.Priority = 2
pushee.Priority = 1 // pusher will win
pusher.Timestamp = proto.Timestamp{WallTime: 50, Logical: 25}
pushee.Timestamp = proto.Timestamp{WallTime: 5, Logical: 1}
// Now, push the transaction with args.Abort=false.
args, reply := pushTxnArgs(pusher, pushee, false /* abort */, 0)
if err := rng.ReadWriteCmd("InternalPushTxn", args, reply); err != nil {
t.Errorf("unexpected error on push: %v", err)
}
expTS := pusher.Timestamp
expTS.Logical++
if !reply.PusheeTxn.Timestamp.Equal(expTS) {
t.Errorf("expected timestamp to be pushed to %+v; got %+v", expTS, reply.PusheeTxn.Timestamp)
}
if reply.PusheeTxn.Status != proto.PENDING {
t.Errorf("expected pushed txn to have status PENDING; got %s", reply.PusheeTxn.Status)
}
}
// TestPrefixConfigSort verifies sorting of keys.
func TestPrefixConfigSort(t *testing.T) {
keys := []engine.Key{
engine.KeyMax,
engine.Key("c"),
engine.Key("a"),
engine.Key("b"),
engine.Key("aa"),
engine.Key("\xfe"),
engine.KeyMin,
}
expKeys := []engine.Key{
engine.KeyMin,
engine.Key("a"),
engine.Key("aa"),
engine.Key("b"),
engine.Key("c"),
engine.Key("\xfe"),
engine.KeyMax,
}
pcc := PrefixConfigMap{}
for _, key := range keys {
pcc = append(pcc, &PrefixConfig{key, nil, nil})
}
sort.Sort(pcc)
for i, pc := range pcc {
if bytes.Compare(pc.Prefix, expKeys[i]) != 0 {
t.Errorf("order for index %d incorrect; expected %q, got %q", i, expKeys[i], pc.Prefix)
}
}
}
// TestCoordinatorHeartbeat verifies periodic heartbeat of the
// transaction record.
func TestCoordinatorHeartbeat(t *testing.T) {
db, _, manual := createTestDB(t)
defer db.Close()
// Set heartbeat interval to 1ms for testing.
db.coordinator.heartbeatInterval = 1 * time.Millisecond
txnID := engine.Key("txn")
<-db.Put(createPutRequest(engine.Key("a"), []byte("value"), txnID))
// Verify 3 heartbeats.
var heartbeatTS proto.Timestamp
for i := 0; i < 3; i++ {
if err := util.IsTrueWithin(func() bool {
ok, txn, err := getTxn(db, engine.MakeKey(engine.KeyLocalTransactionPrefix, txnID))
if !ok || err != nil {
return false
}
// Advance clock by 1ns.
// Locking the coordinator to prevent a data race.
db.coordinator.Lock()
*manual = hlc.ManualClock(*manual + 1)
db.coordinator.Unlock()
if heartbeatTS.Less(*txn.LastHeartbeat) {
heartbeatTS = *txn.LastHeartbeat
return true
}
return false
}, 50*time.Millisecond); err != nil {
t.Error("expected initial heartbeat within 50ms")
}
}
}
func doLookup(t *testing.T, rc *RangeMetadataCache, key string) {
r, err := rc.LookupRangeMetadata(engine.Key(key))
if err != nil {
t.Fatalf("Unexpected error from LookupRangeMetadata: %s", err.Error())
}
if !r.ContainsKey(engine.Key(key)) {
t.Fatalf("Returned range did not contain key: %s-%s, %s", r.StartKey, r.EndKey, key)
}
}
// TestInternalPushTxnBadKey verifies that args.Key equals args.PusheeTxn.ID.
func TestInternalPushTxnBadKey(t *testing.T) {
rng, _, clock, _ := createTestRangeWithClock(t)
defer rng.Stop()
pusher := NewTransaction(engine.Key("a"), 1, proto.SERIALIZABLE, clock)
pushee := NewTransaction(engine.Key("b"), 1, proto.SERIALIZABLE, clock)
args, reply := pushTxnArgs(pusher, pushee, true, 0)
args.Key = pusher.ID
verifyErrorMatches(rng.ReadWriteCmd("InternalPushTxn", args, reply), ".*should match pushee.*", t)
}
// createTestStore creates a test store using an in-memory
// engine. Returns the store clock's manual unix nanos time and the
// store. A single range from key "a" to key "z" is setup in the store
// with a default replica descriptor (i.e. StoreID = 0, RangeID = 1,
// etc.). The caller is responsible for closing the store on exit.
func createTestStore(t *testing.T) (*Store, *hlc.ManualClock) {
manual := hlc.ManualClock(0)
clock := hlc.NewClock(manual.UnixNano)
eng := engine.NewInMem(proto.Attributes{}, 1<<20)
store := NewStore(clock, eng, nil)
replica := proto.Replica{RangeID: 1}
_, err := store.CreateRange(engine.Key("a"), engine.Key("z"), []proto.Replica{replica})
if err != nil {
t.Fatal(err)
}
return store, &manual
}
// ExampleLsZones creates a series of zone configs and verifies
// zone-ls works. First, no regexp lists all zone configs. Second,
// regexp properly matches results.
func ExampleLsZones() {
httpServer := startAdminServer()
defer httpServer.Close()
testConfigFn := createTestConfigFile()
defer os.Remove(testConfigFn)
keys := []engine.Key{
engine.KeyMin,
engine.Key("db1"),
engine.Key("db2"),
engine.Key("db3"),
engine.Key("user"),
}
regexps := []string{
"",
"db*",
"db[12]",
}
for _, key := range keys {
prefix := url.QueryEscape(string(key))
runSetZone(CmdSetZone, []string{prefix, testConfigFn})
}
for i, regexp := range regexps {
fmt.Fprintf(os.Stdout, "test case %d: %q\n", i, regexp)
if regexp == "" {
runLsZones(CmdLsZones, []string{})
} else {
runLsZones(CmdLsZones, []string{regexp})
}
}
// Output:
// set zone config for key prefix ""
// set zone config for key prefix "db1"
// set zone config for key prefix "db2"
// set zone config for key prefix "db3"
// set zone config for key prefix "user"
// test case 0: ""
// [default]
// db1
// db2
// db3
// user
// test case 1: "db*"
// db1
// db2
// db3
// test case 2: "db[12]"
// db1
// db2
}
// TestCoordinatorMultipleTxns verifies correct operation with
// multiple outstanding transactions.
func TestCoordinatorMultipleTxns(t *testing.T) {
db, _, _ := createTestDB(t)
defer db.Close()
txn1ID := engine.Key("txn1")
txn2ID := engine.Key("txn2")
<-db.Put(createPutRequest(engine.Key("a"), []byte("value"), txn1ID))
<-db.Put(createPutRequest(engine.Key("b"), []byte("value"), txn2ID))
if len(db.coordinator.txns) != 2 {
t.Errorf("expected length of transactions map to be 2; got %d", len(db.coordinator.txns))
}
}
func buildTestPrefixConfigMap() PrefixConfigMap {
configs := []*PrefixConfig{
{engine.KeyMin, nil, config1},
{engine.Key("/db1"), nil, config2},
{engine.Key("/db1/table"), nil, config3},
{engine.Key("/db3"), nil, config4},
}
pcc, err := NewPrefixConfigMap(configs)
if err != nil {
log.Fatalf("unexpected error building config map: %v", err)
}
return pcc
}
// TestStoreRaftIDAllocation verifies that raft IDs are
// allocated in successive blocks.
func TestStoreRaftIDAllocation(t *testing.T) {
store, _ := createTestStore(false, t)
defer store.Close()
// Raft IDs should be allocated from ID 2 (first alloc'd range)
// to raftIDAllocCount * 3 + 1.
for i := 0; i < raftIDAllocCount*3; i++ {
r := addTestRange(store, engine.Key(fmt.Sprintf("%03d", i)), engine.Key(fmt.Sprintf("%03d", i+1)), t)
if r.Meta.RaftID != int64(2+i) {
t.Error("expected Raft id %d; got %d", 2+i, r.Meta.RaftID)
}
}
}
// TestRangeCache is a simple test which verifies that metadata ranges
// are being cached and retrieved properly. It sets up a fake backing
// store for the cache, and measures how often that backing store is
// accessed when looking up metadata keys through the cache.
func TestRangeCache(t *testing.T) {
db := newTestMetadataDB()
for i, char := range "abcdefghijklmnopqrstuvwx" {
db.splitRange(t, engine.Key(string(char)))
if i > 0 && i%6 == 0 {
db.splitRange(t, engine.RangeMetaKey(engine.Key(string(char))))
}
}
rangeCache := NewRangeMetadataCache(db)
db.cache = rangeCache
doLookup(t, rangeCache, "aa")
db.assertHitCount(t, 2)
// Metadata for the following ranges should be cached
doLookup(t, rangeCache, "ab")
db.assertHitCount(t, 0)
doLookup(t, rangeCache, "ba")
db.assertHitCount(t, 0)
doLookup(t, rangeCache, "cz")
db.assertHitCount(t, 0)
// Metadata two ranges weren't cached, same metadata 1 range
doLookup(t, rangeCache, "d")
db.assertHitCount(t, 1)
doLookup(t, rangeCache, "fa")
db.assertHitCount(t, 0)
// Metadata two ranges weren't cached, metadata 1 was aggressively cached
doLookup(t, rangeCache, "ij")
db.assertHitCount(t, 1)
doLookup(t, rangeCache, "jk")
db.assertHitCount(t, 0)
doLookup(t, rangeCache, "pn")
db.assertHitCount(t, 1)
// Totally uncached ranges
doLookup(t, rangeCache, "vu")
db.assertHitCount(t, 2)
doLookup(t, rangeCache, "xx")
db.assertHitCount(t, 0)
// Evict clears one level 1 and one level 2 cache
rangeCache.EvictCachedRangeMetadata(engine.Key("da"))
doLookup(t, rangeCache, "fa")
db.assertHitCount(t, 0)
doLookup(t, rangeCache, "da")
db.assertHitCount(t, 2)
}
// TestCoordinatorEndTxn verifies that ending a transaction
// sends resolve write intent requests and removes the transaction
// from the txns map.
func TestCoordinatorEndTxn(t *testing.T) {
db, _, _ := createTestDB(t)
defer db.Close()
txnID := engine.Key("txn")
<-db.Put(createPutRequest(engine.Key("a"), []byte("value"), txnID))
db.coordinator.EndTxn(txnID, true)
if len(db.coordinator.txns) != 0 {
t.Errorf("expected empty transactions map; got %d", len(db.coordinator.txns))
}
// TODO(spencer): need to test that write intents were sent to key "a".
}
// TestRangeCache is a simple test which verifies that metadata ranges are being
// cached and retrieved properly. It sets up a fake backing store for the
// cache, and measures how often that backing store is accessed when looking up
// metadata keys through the cache.
func TestRangeCache(t *testing.T) {
db := newTestMetadataDB()
db.splitRange(t, engine.Key("a"))
db.splitRange(t, engine.Key("b"))
db.splitRange(t, engine.Key("c"))
db.splitRange(t, engine.Key("d"))
db.splitRange(t, engine.Key("e"))
db.splitRange(t, engine.Key("f"))
db.splitRange(t, engine.RangeMetaKey(engine.Key("d")))
db.hitCount = 0
rangeCache := NewRangeMetadataCache(db)
db.cache = rangeCache
doLookup(t, rangeCache, "ba")
db.assertHitCount(t, 2)
doLookup(t, rangeCache, "bb")
db.assertHitCount(t, 0)
doLookup(t, rangeCache, "ca")
db.assertHitCount(t, 1)
// Different metadata one range
doLookup(t, rangeCache, "da")
db.assertHitCount(t, 2)
doLookup(t, rangeCache, "fa")
db.assertHitCount(t, 1)
// Evict clears both level 1 and level 2 cache for a key
rangeCache.EvictCachedRangeMetadata(engine.Key("da"))
doLookup(t, rangeCache, "fa")
db.assertHitCount(t, 0)
doLookup(t, rangeCache, "da")
db.assertHitCount(t, 2)
}
// AddRequest is called on every client request to update the
// lastUpdateTS to prevent live transactions from being considered
// abandoned and garbage collected. Read/write mutating requests have
// their key(s) added to the transaction's keys slice for eventual
// cleanup via resolved write intents.
func (tc *coordinator) AddRequest(method string, header *proto.RequestHeader) {
// Ignore non-transactional requests.
if len(header.TxnID) == 0 || !isTransactional(method) {
return
}
tc.Lock()
defer tc.Unlock()
if _, ok := tc.txns[string(header.TxnID)]; !ok {
tc.txns[string(header.TxnID)] = &txnMetadata{
lastUpdateTS: tc.clock.Now(),
timeoutDuration: tc.clientTimeout,
closer: make(chan struct{}),
}
// TODO(jiajia): Reevaluate this logic of creating a goroutine
// for each active transaction. Spencer suggests a heap
// containing next heartbeat timeouts which is processed by a
// single goroutine.
go tc.heartbeat(engine.Key(header.TxnID), tc.txns[string(header.TxnID)].closer)
}
txnMeta := tc.txns[string(header.TxnID)]
txnMeta.lastUpdateTS = tc.clock.Now()
// If read-only, exit now; otherwise, store the affected key range.
if storage.IsReadOnly(method) {
return
}
// Otherwise, append a new key range to the set of affected keys.
txnMeta.keys = append(txnMeta.keys, engine.KeyRange{
Start: header.Key,
End: header.EndKey,
})
}
// ExampleRmZones creates a series of zone configs and verifies
// zone-rm works by deleting some and then all and verifying entries
// have been removed via zone-ls. Also verify the default zone cannot
// be removed.
func ExampleRmZones() {
httpServer := startAdminServer()
defer httpServer.Close()
testConfigFn := createTestConfigFile()
defer os.Remove(testConfigFn)
keys := []engine.Key{
engine.KeyMin,
engine.Key("db1"),
}
for _, key := range keys {
prefix := url.QueryEscape(string(key))
runSetZone(CmdSetZone, []string{prefix, testConfigFn})
}
for _, key := range keys {
prefix := url.QueryEscape(string(key))
runRmZone(CmdRmZone, []string{prefix})
runLsZones(CmdLsZones, []string{})
}
// Output:
// set zone config for key prefix ""
// set zone config for key prefix "db1"
// [default]
// db1
// removed zone config for key prefix "db1"
// [default]
}
// TestInternalPushTxnAlreadyCommittedOrAborted verifies success
// (noop) in event that pushee is already committed or aborted.
func TestInternalPushTxnAlreadyCommittedOrAborted(t *testing.T) {
rng, _, clock, _ := createTestRangeWithClock(t)
defer rng.Stop()
for i, status := range []proto.TransactionStatus{proto.COMMITTED, proto.ABORTED} {
key := engine.Key(fmt.Sprintf("key-%d", i))
pusher := NewTransaction(engine.MakeKey(key, []byte{1}), 1, proto.SERIALIZABLE, clock)
pushee := NewTransaction(engine.MakeKey(key, []byte{2}), 1, proto.SERIALIZABLE, clock)
pusher.Priority = 1
pushee.Priority = 2 // pusher will lose, meaning we shouldn't push unless pushee is already ended.
// End the pushee's transaction.
etArgs, etReply := endTxnArgs(pushee, status == proto.COMMITTED, 0)
etArgs.Timestamp = pushee.Timestamp
if err := rng.ReadWriteCmd("EndTransaction", etArgs, etReply); err != nil {
t.Fatal(err)
}
// Now try to push what's already committed or aborted.
args, reply := pushTxnArgs(pusher, pushee, true, 0)
if err := rng.ReadWriteCmd("InternalPushTxn", args, reply); err != nil {
t.Fatal(err)
}
if reply.PusheeTxn.Status != status {
t.Errorf("expected push txn to return with status == %s; got %+v", status, reply.PusheeTxn)
}
}
}
func TestKeysAndBodyArePreserved(t *testing.T) {
encKey := "%00some%2Fkey%20that%20encodes%E4%B8%96%E7%95%8C"
encBody := "%00some%2FBODY%20that%20encodes"
s := runHTTPTestFixture(t, []RequestResponse{
{
NewRequest("POST", encKey, encBody),
NewResponse(200),
},
{
NewRequest("GET", encKey),
NewResponse(200, encBody, "application/octet-stream"),
},
})
gr := <-s.db.Get(&proto.GetRequest{
RequestHeader: proto.RequestHeader{
Key: engine.Key("\x00some/key that encodes世界"),
User: storage.UserRoot,
},
})
if gr.Error != nil {
t.Errorf("Unable to fetch values from local db")
}
if !bytes.Equal(gr.Value.Bytes, []byte(encBody)) {
t.Errorf("Expected value (%s) but got (%s)", encBody, gr.Value.Bytes)
}
}
// DeleteSchema removes s from the kv store.
func (db *structuredDB) DeleteSchema(s *Schema) error {
return (<-db.kvDB.Delete(&proto.DeleteRequest{
RequestHeader: proto.RequestHeader{
Key: engine.MakeKey(engine.KeySchemaPrefix, engine.Key(s.Key)),
},
})).GoError()
}
// PutSchema inserts s into the kv store for subsequent
// usage by clients.
func (db *structuredDB) PutSchema(s *Schema) error {
if err := s.Validate(); err != nil {
return err
}
k := engine.MakeKey(engine.KeySchemaPrefix, engine.Key(s.Key))
return storage.PutI(db.kvDB, k, s, proto.Timestamp{})
}
// TestEndTransactionWithErrors verifies various error conditions
// are checked such as transaction already being committed or
// aborted, or timestamp or epoch regression.
func TestEndTransactionWithErrors(t *testing.T) {
rng, mc, clock, _ := createTestRangeWithClock(t)
defer rng.Stop()
regressTS := clock.Now()
*mc = hlc.ManualClock(1)
txn := NewTransaction(engine.Key(""), 1, proto.SERIALIZABLE, clock)
testCases := []struct {
key engine.Key
existStatus proto.TransactionStatus
existEpoch int32
existTS proto.Timestamp
expErrRegexp string
}{
{engine.Key("a"), proto.COMMITTED, txn.Epoch, txn.Timestamp, "txn {.*}: already committed"},
{engine.Key("b"), proto.ABORTED, txn.Epoch, txn.Timestamp, "txn {.*}: already aborted"},
{engine.Key("c"), proto.PENDING, txn.Epoch + 1, txn.Timestamp, "txn {.*}: epoch regression: 0"},
{engine.Key("d"), proto.PENDING, txn.Epoch, regressTS, "txn {.*}: timestamp regression: {WallTime:1 Logical:0 .*}"},
}
for _, test := range testCases {
// Establish existing txn state by writing directly to range engine.
var existTxn proto.Transaction
gogoproto.Merge(&existTxn, txn)
existTxn.ID = test.key
existTxn.Status = test.existStatus
existTxn.Epoch = test.existEpoch
existTxn.Timestamp = test.existTS
txnKey := engine.MakeKey(engine.KeyLocalTransactionPrefix, test.key)
if err := engine.PutProto(rng.engine, txnKey, &existTxn); err != nil {
t.Fatal(err)
}
// End the transaction, verify expected error.
txn.ID = test.key
args, reply := endTxnArgs(txn, true, 0)
args.Timestamp = txn.Timestamp
err := rng.ReadWriteCmd("EndTransaction", args, reply)
if err == nil {
t.Errorf("expected error matching %q", test.expErrRegexp)
} else {
if matched, regexpErr := regexp.MatchString(test.expErrRegexp, err.Error()); !matched || regexpErr != nil {
t.Errorf("expected error to match %q (%v): %v", test.expErrRegexp, regexpErr, err.Error())
}
}
}
}
// ExampleSetAndGetZone sets zone configs for a variety of key
// prefixes and verifies they can be fetched directly.
func ExampleSetAndGetZone() {
httpServer := startAdminServer()
defer httpServer.Close()
testConfigFn := createTestConfigFile()
defer os.Remove(testConfigFn)
testData := []struct {
prefix engine.Key
yaml string
}{
{engine.KeyMin, testConfig},
{engine.Key("db1"), testConfig},
{engine.Key("db 2"), testConfig},
{engine.Key("\xfe"), testConfig},
}
for _, test := range testData {
prefix := url.QueryEscape(string(test.prefix))
runSetZone(CmdSetZone, []string{prefix, testConfigFn})
runGetZones(CmdGetZone, []string{prefix})
}
// Output:
// set zone config for key prefix ""
// zone config for key prefix "":
// replicas: [[dc1, ssd]]
// range_min_bytes: 1048576
// range_max_bytes: 67108864
// set zone config for key prefix "db1"
// zone config for key prefix "db1":
// replicas: [[dc1, ssd]]
// range_min_bytes: 1048576
// range_max_bytes: 67108864
// set zone config for key prefix "db+2"
// zone config for key prefix "db+2":
// replicas: [[dc1, ssd]]
// range_min_bytes: 1048576
// range_max_bytes: 67108864
// set zone config for key prefix "%FE"
// zone config for key prefix "%FE":
// replicas: [[dc1, ssd]]
// range_min_bytes: 1048576
// range_max_bytes: 67108864
}
// makeKey encodes the range ID and client command ID into a key
// for storage in the underlying engine. Note that the prefix for
// response cache keys sorts them at the very top of the engine's
// keyspace.
// TODO(spencer): going to need to encode the server timestamp
// for when the value was written for GC.
func (rc *ResponseCache) makeKey(cmdID ClientCmdID) engine.Key {
return engine.Key(bytes.Join([][]byte{
engine.KeyLocalRangeResponseCachePrefix,
encoding.EncodeInt(rc.rangeID),
encoding.EncodeInt(cmdID.WallTime), // wall time helps sort for locality
encoding.EncodeInt(cmdID.Random), // TODO(spencer): encode as Fixed64
}, []byte{}))
}
// TestInternalPushTxnUpgradeExistingTxn verifies that pushing
// a transaction record with a new epoch upgrades the pushee's
// epoch and timestamp if greater. In all test cases, the
// priorities are set such that the push will succeed.
func TestInternalPushTxnUpgradeExistingTxn(t *testing.T) {
rng, _, clock, _ := createTestRangeWithClock(t)
defer rng.Stop()
ts1 := proto.Timestamp{WallTime: 1}
ts2 := proto.Timestamp{WallTime: 2}
testCases := []struct {
startEpoch, epoch, expEpoch int32
startTS, ts, expTS proto.Timestamp
}{
// Move epoch forward.
{0, 1, 1, ts1, ts1, ts1},
// Move timestamp forward.
{0, 0, 0, ts1, ts2, ts2},
// Move epoch backwards (has no effect).
{1, 0, 1, ts1, ts1, ts1},
// Move timestamp backwards (has no effect).
{0, 0, 0, ts2, ts1, ts2},
// Move both epoch & timestamp forward.
{0, 1, 1, ts1, ts2, ts2},
// Move both epoch & timestamp backward (has no effect).
{1, 0, 1, ts2, ts1, ts2},
}
for i, test := range testCases {
key := engine.Key(fmt.Sprintf("key-%d", i))
pusher := NewTransaction(engine.MakeKey(key, []byte{1}), 1, proto.SERIALIZABLE, clock)
pushee := NewTransaction(engine.MakeKey(key, []byte{2}), 1, proto.SERIALIZABLE, clock)
pushee.Priority = 1
pusher.Priority = 2 // Pusher will win.
// First, establish "start" of existing pushee's txn via heartbeat.
pushee.Epoch = test.startEpoch
pushee.Timestamp = test.startTS
hbArgs, hbReply := heartbeatArgs(pushee, 0)
hbArgs.Timestamp = pushee.Timestamp
if err := rng.ReadWriteCmd("InternalHeartbeatTxn", hbArgs, hbReply); err != nil {
t.Fatal(err)
}
// Now, attempt to push the transaction using updated values for epoch & timestamp.
pushee.Epoch = test.epoch
pushee.Timestamp = test.ts
args, reply := pushTxnArgs(pusher, pushee, true, 0)
if err := rng.ReadWriteCmd("InternalPushTxn", args, reply); err != nil {
t.Fatal(err)
}
expTxn := gogoproto.Clone(pushee).(*proto.Transaction)
expTxn.Epoch = test.expEpoch
expTxn.Timestamp = test.expTS
expTxn.Status = proto.ABORTED
expTxn.LastHeartbeat = &test.startTS
if !reflect.DeepEqual(expTxn, reply.PusheeTxn) {
t.Errorf("unexpected push txn in trial %d; expected %+v, got %+v", i, expTxn, reply.PusheeTxn)
}
}
}
