/
server_queue_test.go
1271 lines (1161 loc) · 34.3 KB
/
server_queue_test.go
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// Copyright 2016-2019 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"fmt"
"runtime"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/nats-io/nats-streaming-server/spb"
"github.com/nats-io/nats-streaming-server/stores"
"github.com/nats-io/nats.go"
"github.com/nats-io/stan.go"
"github.com/nats-io/stan.go/pb"
)
// As of now, it is possible for members of the same group to have different
// AckWait values. This test checks that if a member with an higher AckWait
// than the other member leaves, the message with an higher expiration time
// is set to the remaining member's AckWait value.
// It also checks that on the opposite case, if a member leaves and the
// remaining member has a higher AckWait, the original expiration time is
// maintained.
func TestQueueSubsWithDifferentAckWait(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
var qsub1, qsub2, qsub3 stan.Subscription
var err error
dch := make(chan bool)
rch2 := make(chan bool)
rch3 := make(chan bool)
cb := func(m *stan.Msg) {
if !m.Redelivered {
dch <- true
} else {
if m.Sub == qsub2 {
rch2 <- true
} else if m.Sub == qsub3 {
rch3 <- true
// stop further redeliveries, test is done.
qsub3.Close()
}
}
}
// Create first queue member with high AckWait
qsub1, err = sc.QueueSubscribe("foo", "bar", cb,
stan.SetManualAckMode(),
stan.AckWait(ackWaitInMs(1000)))
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Send the single message used in this test
if err := sc.Publish("foo", []byte("hello")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Wait for message to be received
if err := Wait(dch); err != nil {
t.Fatal("Did not get our message")
}
// Create the second member with low AckWait
qsub2, err = sc.QueueSubscribe("foo", "bar", cb,
stan.SetManualAckMode(),
stan.AckWait(ackWaitInMs(15)))
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Check we have the two members
checkQueueGroupSize(t, s, "foo", "bar", true, 2)
// Close the first, message should be redelivered within
// qsub2's AckWait, which is 1 second.
qsub1.Close()
// Check we have only 1 member
checkQueueGroupSize(t, s, "foo", "bar", true, 1)
// Wait for redelivery
select {
case <-rch2:
// ok
case <-time.After(200 * time.Millisecond):
t.Fatal("Message should have been redelivered")
}
// Create 3rd member with higher AckWait than the 2nd
qsub3, err = sc.QueueSubscribe("foo", "bar", cb,
stan.SetManualAckMode(),
stan.AckWait(ackWaitInMs(150)))
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Close qsub2
qsub2.Close()
// Check we have only 1 member
checkQueueGroupSize(t, s, "foo", "bar", true, 1)
// Wait for redelivery. It should happen after the remaining
// of the first redelivery to qsub2 and its AckWait, which
// should be less than 15 ms.
select {
case <-rch3:
// ok
case <-time.After(200 * time.Millisecond):
t.Fatal("Message should have been redelivered")
}
}
func TestQueueMaxInFlight(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
total := 100
payload := []byte("hello")
for i := 0; i < total; i++ {
sc.Publish("foo", payload)
}
ch := make(chan bool)
received := 0
cb := func(m *stan.Msg) {
if !m.Redelivered {
received++
if received == total {
ch <- true
}
}
}
if _, err := sc.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable(),
stan.MaxInflight(5)); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
if err := Wait(ch); err != nil {
t.Fatal("Did not get all our messages")
}
}
func TestQueueGroupRemovedOnLastMemberLeaving(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
if err := sc.Publish("foo", []byte("msg1")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
ch := make(chan bool)
cb := func(m *stan.Msg) {
if m.Sequence == 1 {
ch <- true
}
}
// Create a queue subscriber
if _, err := sc.QueueSubscribe("foo", "group", cb, stan.DeliverAllAvailable()); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Wait to receive the message
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Close the connection which will remove the queue subscriber
sc.Close()
// Create a new connection
sc = NewDefaultConnection(t)
defer sc.Close()
// Send a new message
if err := sc.Publish("foo", []byte("msg2")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Start a queue subscriber. The group should have been destroyed
// when the last member left, so even with a new name, this should
// be a new group and start from msg seq 1
qsub, err := sc.QueueSubscribe("foo", "group", cb, stan.DeliverAllAvailable())
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Wait to receive the message
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Test with unsubscribe
if err := qsub.Unsubscribe(); err != nil {
t.Fatalf("Error during Unsubscribe: %v", err)
}
// Recreate a queue subscriber, it should again receive from msg1
if _, err := sc.QueueSubscribe("foo", "group", cb, stan.DeliverAllAvailable()); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Wait to receive the message
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
}
func TestQueueSubscriberTransferPendingMsgsOnClose(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
if err := sc.Publish("foo", []byte("msg1")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
var sub1 stan.Subscription
var sub2 stan.Subscription
var err error
ch := make(chan bool)
qsetup := make(chan bool)
cb := func(m *stan.Msg) {
<-qsetup
if m.Sub == sub1 && m.Sequence == 1 && !m.Redelivered {
ch <- true
} else if m.Sub == sub2 && m.Sequence == 1 && m.Redelivered {
ch <- true
}
}
// Create a queue subscriber with MaxInflight == 1 and manual ACK
// so that it does not ack it and see if it will be redelivered.
sub1, err = sc.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable(),
stan.MaxInflight(1),
stan.SetManualAckMode())
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
qsetup <- true
// Wait to receive the message
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Start 2nd queue subscriber on same group
sub2, err = sc.QueueSubscribe("foo", "group", cb, stan.AckWait(ackWaitInMs(15)))
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Unsubscribe the first member
sub1.Unsubscribe()
qsetup <- true
// The second queue subscriber should receive the first message.
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
}
func TestPersistentStoreQueueSubLeavingUpdateQGroupLastSent(t *testing.T) {
cleanupDatastore(t)
defer cleanupDatastore(t)
opts := getTestDefaultOptsForPersistentStore()
s := runServerWithOpts(t, opts, nil)
defer shutdownRestartedServerOnTestExit(&s)
sc, nc := createConnectionWithNatsOpts(t, clientName, nats.ReconnectWait(50*time.Millisecond))
defer nc.Close()
defer sc.Close()
if err := sc.Publish("foo", []byte("msg1")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
ch := make(chan bool)
cb := func(m *stan.Msg) {
ch <- true
}
// Create a queue subscriber with MaxInflight == 1 and manual ACK
// so that it does not ack it and see if it will be redelivered.
if _, err := sc.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable(),
stan.MaxInflight(1),
stan.SetManualAckMode()); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Wait to receive the message
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// send second message
if err := sc.Publish("foo", []byte("msg2")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Start 2nd queue subscriber on same group
sub2, err := sc.QueueSubscribe("foo", "group", cb, stan.DeliverAllAvailable())
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// The second queue subscriber should receive the second message.
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Unsubscribe the second member
sub2.Unsubscribe()
// Restart server
s.Shutdown()
s = runServerWithOpts(t, opts, nil)
// Send a third message
if err := sc.Publish("foo", []byte("msg3")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Start a third queue subscriber, it should receive message 3
msgCh := make(chan *stan.Msg)
lastMsgCb := func(m *stan.Msg) {
msgCh <- m
}
if _, err := sc.QueueSubscribe("foo", "group", lastMsgCb, stan.DeliverAllAvailable()); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Wait for msg3 or an error to occur
gotIt := false
select {
case m := <-msgCh:
if m.Sequence != 3 {
t.Fatalf("Unexpected message: %v", m)
} else {
gotIt = true
break
}
case <-time.After(250 * time.Millisecond):
// Wait for a bit to see if we receive extraneous messages
break
}
if !gotIt {
t.Fatal("Did not get message 3")
}
}
func checkQueueGroupSize(t *testing.T, s *StanServer, channelName, groupName string, expectedExist bool, expectedSize int) {
cs := channelsGet(t, s.channels, channelName)
s.mu.RLock()
groupSize := 0
group, exist := cs.ss.qsubs[groupName]
if exist {
groupSize = len(group.subs)
}
s.mu.RUnlock()
if expectedExist && !exist {
stackFatalf(t, "Expected group to still exist, does not")
}
if !expectedExist && exist {
stackFatalf(t, "Expected group to not exist, it does")
}
if expectedExist {
if groupSize != expectedSize {
stackFatalf(t, "Expected group size to be %v, got %v", expectedSize, groupSize)
}
}
}
func TestBasicDurableQueueSub(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc1 := NewDefaultConnection(t)
defer sc1.Close()
if err := sc1.Publish("foo", []byte("msg1")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
ch := make(chan bool)
count := 0
cb := func(m *stan.Msg) {
count++
if count == 1 && m.Sequence == 1 {
ch <- true
} else if count == 2 && m.Sequence == 2 {
ch <- true
}
}
// Create a durable queue subscriber.
sc2, err := stan.Connect(clusterName, "sc2cid")
if err != nil {
stackFatalf(t, "Expected to connect correctly, got err %v", err)
}
defer sc2.Close()
if _, err := sc2.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable(),
stan.DurableName("qsub")); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Check group exists
checkQueueGroupSize(t, s, "foo", "qsub:group", true, 1)
// Wait to receive the message
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// For this test, make sure we wait for ack to be processed.
waitForAcks(t, s, "sc2cid", 1, 0)
// Close the durable queue sub's connection.
// This should not close the queue group
sc2.Close()
// Check queue group still exist, but size 0
checkQueueGroupSize(t, s, "foo", "qsub:group", true, 0)
// Send another message
if err := sc1.Publish("foo", []byte("msg2")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Create a durable queue subscriber on the group.
sub, err := sc1.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable(),
stan.DurableName("qsub"))
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// It should receive message 2 only
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Now unsubscribe the sole member
if err := sub.Unsubscribe(); err != nil {
t.Fatalf("Error during Unsubscribe: %v", err)
}
// Group should be gone.
checkQueueGroupSize(t, s, "foo", "qsub:group", false, 0)
}
func TestDurableAndNonDurableQueueSub(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
// Expect failure if durable name contains ':'
_, err := sc.QueueSubscribe("foo", "group", func(_ *stan.Msg) {},
stan.DurableName("qsub:"))
if err == nil {
t.Fatal("Expected error on subscribe")
}
if err.Error() != ErrInvalidDurName.Error() {
t.Fatalf("Expected error %v, got %v", ErrInvalidDurName, err)
}
if err := sc.Publish("foo", []byte("msg1")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
ch := make(chan bool)
cb := func(m *stan.Msg) {
ch <- true
}
// Create a durable queue subscriber.
if _, err := sc.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable(),
stan.DurableName("qsub")); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Create a regular one
if _, err := sc.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable()); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Check groups exists
checkQueueGroupSize(t, s, "foo", "qsub:group", true, 1)
checkQueueGroupSize(t, s, "foo", "group", true, 1)
// Wait to receive the messages
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Close connection
sc.Close()
// Non durable group should be gone
checkQueueGroupSize(t, s, "foo", "group", false, 0)
// Other should exist, but empty
checkQueueGroupSize(t, s, "foo", "qsub:group", true, 0)
}
func TestPersistentStoreDurableQueueSub(t *testing.T) {
cleanupDatastore(t)
defer cleanupDatastore(t)
opts := getTestDefaultOptsForPersistentStore()
s := runServerWithOpts(t, opts, nil)
defer shutdownRestartedServerOnTestExit(&s)
sc1, nc1 := createConnectionWithNatsOpts(t, clientName, nats.ReconnectWait(50*time.Millisecond))
defer nc1.Close()
defer sc1.Close()
if err := sc1.Publish("foo", []byte("msg1")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
ch := make(chan bool)
count := 0
cb := func(m *stan.Msg) {
count++
if count == 1 && m.Sequence == 1 {
ch <- true
} else if count == 2 && m.Sequence == 2 {
ch <- true
}
}
// Create a durable queue subscriber.
sc2, err := stan.Connect(clusterName, "sc2cid")
if err != nil {
stackFatalf(t, "Expected to connect correctly, got err %v", err)
}
defer sc2.Close()
if _, err := sc2.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable(),
stan.DurableName("qsub")); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Wait to receive the message
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// For this test, make sure ack is processed
waitForAcks(t, s, "sc2cid", 1, 0)
// Close the durable queue sub's connection.
// This should not close the queue group
sc2.Close()
// Check queue group still exist, but size 0
checkQueueGroupSize(t, s, "foo", "qsub:group", true, 0)
// Send another message
if err := sc1.Publish("foo", []byte("msg2")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Stop and restart the server
s.Shutdown()
s = runServerWithOpts(t, opts, nil)
// Create another client connection
sc2, err = stan.Connect(clusterName, "sc2cid")
if err != nil {
stackFatalf(t, "Expected to connect correctly, got err %v", err)
}
defer sc2.Close()
// Create a durable queue subscriber on the group.
if _, err := sc2.QueueSubscribe("foo", "group", cb,
stan.DeliverAllAvailable(),
stan.DurableName("qsub")); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// It should receive message 2 only
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
}
func TestPersistentStoreQMemberRemovedFromStore(t *testing.T) {
cleanupDatastore(t)
defer cleanupDatastore(t)
opts := getTestDefaultOptsForPersistentStore()
s := runServerWithOpts(t, opts, nil)
defer shutdownRestartedServerOnTestExit(&s)
sc1 := NewDefaultConnection(t)
defer sc1.Close()
ch := make(chan bool)
// Create the group (adding the first member)
if _, err := sc1.QueueSubscribe("foo", "group",
func(_ *stan.Msg) {
ch <- true
},
stan.DurableName("dur")); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
sc2, err := stan.Connect(clusterName, "othername")
if err != nil {
stackFatalf(t, "Expected to connect correctly, got err %v", err)
}
defer sc2.Close()
// Add a second member to the group
if _, err := sc2.QueueSubscribe("foo", "group", func(_ *stan.Msg) {},
stan.DurableName("dur")); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Remove it by closing the connection.
sc2.Close()
// Send a message and verify it is received
if err := sc1.Publish("foo", []byte("hello")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Have the first leave the group too.
sc1.Close()
// Restart the server
s.Shutdown()
s = runServerWithOpts(t, opts, nil)
sc := NewDefaultConnection(t)
defer sc.Close()
// Send a new message
if err := sc.Publish("foo", []byte("hello")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Have a member rejoin the group
if _, err := sc.QueueSubscribe("foo", "group",
func(_ *stan.Msg) {
ch <- true
},
stan.DurableName("dur")); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// It should receive the second message
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Check server state
s.mu.RLock()
cs := channelsLookupOrCreate(t, s, "foo")
ss := cs.ss
s.mu.RUnlock()
ss.RLock()
qs := ss.qsubs["dur:group"]
ss.RUnlock()
if len(qs.subs) != 1 {
t.Fatalf("Expected only 1 member, got %v", len(qs.subs))
}
}
func TestPersistentStoreMultipleShadowQSubs(t *testing.T) {
cleanupDatastore(t)
defer cleanupDatastore(t)
opts := getTestDefaultOptsForPersistentStore()
s := runServerWithOpts(t, opts, nil)
s.Shutdown()
var (
store stores.Store
err error
)
limits := stores.DefaultStoreLimits
switch persistentStoreType {
case stores.TypeFile:
store, err = stores.NewFileStore(testLogger, defaultDataStore, &limits)
case stores.TypeSQL:
store, err = stores.NewSQLStore(testLogger, testSQLDriver, testSQLSource, &limits)
}
if err != nil {
t.Fatalf("Error creating store: %v", err)
}
defer store.Close()
cs, err := store.CreateChannel("foo")
if err != nil {
t.Fatalf("Error creating channel: %v", err)
}
sub := spb.SubState{
ID: 1,
AckInbox: nats.NewInbox(),
Inbox: nats.NewInbox(),
AckWaitInSecs: 30,
MaxInFlight: 10,
LastSent: 1,
IsDurable: true,
QGroup: "dur:queue",
}
cs.Subs.CreateSub(&sub)
sub.ID = 2
sub.LastSent = 2
cs.Subs.CreateSub(&sub)
store.Close()
// Should not panic
s = runServerWithOpts(t, opts, nil)
defer s.Shutdown()
scs := channelsLookupOrCreate(t, s, "foo")
ss := scs.ss
ss.RLock()
qs := ss.qsubs["dur:queue"]
ss.RUnlock()
if qs == nil {
t.Fatal("Should have recovered queue group")
}
qs.RLock()
shadow := qs.shadow
lastSent := qs.lastSent
qs.RUnlock()
if shadow == nil {
t.Fatal("Should have recovered a shadow queue sub")
}
if shadow.ID != 2 || lastSent != 2 {
t.Fatalf("Recovered shadow queue sub should be ID 2, lastSent 2, got %v, %v", shadow.ID, lastSent)
}
}
func TestQueueWithOneStalledMemberDoesNotStallGroup(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
ch := make(chan bool, 1)
// Create a member with low MaxInflight and Manual ack mode
if _, err := sc.QueueSubscribe("foo", "queue",
func(_ *stan.Msg) {
ch <- true
},
stan.MaxInflight(1),
stan.SetManualAckMode()); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
if err := sc.Publish("foo", []byte("msg")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Check message is received
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// Create another member with higher MaxInFlight and manual ack mode too.
count := 0
total := 5
if _, err := sc.QueueSubscribe("foo", "queue",
func(_ *stan.Msg) {
count++
if count == total {
ch <- true
}
},
stan.MaxInflight(10),
stan.SetManualAckMode()); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// Send messages and ensure they are received by 2nd member
for i := 0; i < total; i++ {
if err := sc.Publish("foo", []byte("msg")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
}
if err := Wait(ch); err != nil {
t.Fatal("Did not get our messages")
}
}
type queueGroupStalledMsgStore struct {
stores.MsgStore
lookupCh chan struct{}
}
func (s *queueGroupStalledMsgStore) Lookup(seq uint64) (*pb.MsgProto, error) {
s.lookupCh <- struct{}{}
return s.MsgStore.Lookup(seq)
}
func TestQueueGroupStalledSemantics(t *testing.T) {
cleanupDatastore(t)
defer cleanupDatastore(t)
opts := getTestDefaultOptsForPersistentStore()
s := runServerWithOpts(t, opts, nil)
defer shutdownRestartedServerOnTestExit(&s)
sc, nc := createConnectionWithNatsOpts(t, clientName, nats.ReconnectWait(50*time.Millisecond))
defer nc.Close()
defer sc.Close()
ch := make(chan bool)
cb := func(m *stan.Msg) {
ch <- true
}
// Create a member with manual ack and MaxInFlight of 1
if _, err := sc.QueueSubscribe("foo", "queue", cb,
stan.SetManualAckMode(), stan.MaxInflight(1)); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
if err := sc.Publish("foo", []byte("msg")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
// This member is stalled, and since there is only one member, the
// group itself should be stalled.
checkStalled := func(expected bool) {
var stalled bool
timeout := time.Now().Add(time.Second)
for time.Now().Before(timeout) {
c := channelsGet(t, s.channels, "foo")
c.ss.RLock()
qs := c.ss.qsubs["queue"]
c.ss.RUnlock()
qs.RLock()
stalled = qs.stalledSubCount == len(qs.subs)
qs.RUnlock()
if stalled != expected {
time.Sleep(10 * time.Millisecond)
continue
}
break
}
if stalled != expected {
stackFatalf(t, "Expected stalled to be %v, got %v", expected, stalled)
}
}
checkStalled(true)
// Create another member that has a higher MaxInFlight
if _, err := sc.QueueSubscribe("foo", "queue", cb,
stan.SetManualAckMode(), stan.MaxInflight(3)); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
// That should make the queue sub not stalled
checkStalled(false)
// Publish 3 messages, check state for each iteration
for i := 0; i < 3; i++ {
if err := sc.Publish("foo", []byte("msg")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
if err := Wait(ch); err != nil {
t.Fatal("Did not get our message")
}
stalled := i == 2
checkStalled(stalled)
}
checkStalled(true)
// Replace store with one that will report if Lookup was used
s.channels.Lock()
c := s.channels.channels["foo"]
ms := &queueGroupStalledMsgStore{c.store.Msgs, make(chan struct{}, 2)}
c.store.Msgs = ms
s.channels.Unlock()
// Publish a message
if err := sc.Publish("foo", []byte("msg")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
// Check that no Lookup was done
select {
case <-ms.lookupCh:
t.Fatalf("Lookup should not have been invoked")
case <-time.After(50 * time.Millisecond):
}
// Restart server...
s.Shutdown()
s = runServerWithOpts(t, opts, nil)
// Serve will check if messages need to be redelivered, but since it
// is less than the AckWait of 30 seconds, it won't send them. Still,
// they are looked up at this point. So wait a little before swapping
// with mock store.
time.Sleep(100 * time.Millisecond)
// Replace store with one that will report if Lookup was used
s.channels.Lock()
c = s.channels.channels["foo"]
orgMS := c.store.Msgs
ms = &queueGroupStalledMsgStore{c.store.Msgs, make(chan struct{}, 2)}
c.store.Msgs = ms
s.channels.Unlock()
// Publish a message
if err := sc.Publish("foo", []byte("msg")); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
select {
case <-ms.lookupCh:
t.Fatalf("Lookup should not have been invoked")
case <-time.After(50 * time.Millisecond):
}
// Then replace store with original one before exit.
s.channels.Lock()
c = s.channels.channels["foo"]
c.store.Msgs = orgMS
s.channels.Unlock()
}
func TestQueueGroupUnStalledOnAcks(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
// Produce messages to a channel
msgCount := 10000
msg := []byte("hello")
for i := 0; i < msgCount; i++ {
if i == msgCount-1 {
if err := sc.Publish("foo", msg); err != nil {
t.Fatalf("Error on publish: %v", err)
}
} else {
if _, err := sc.PublishAsync("foo", msg, func(guid string, puberr error) {
if puberr != nil {
t.Fatalf("Error on publish %q: %v", guid, puberr)
}
}); err != nil {
t.Fatalf("Error on publish: %v", err)
}
}
}
count := int32(0)
doneCh := make(chan bool)
mcb := func(m *stan.Msg) {
if c := atomic.AddInt32(&count, 1); c == int32(msgCount) {
doneCh <- true
}
}
// Create multiple queue subs
for i := 0; i < 4; i++ {
if _, err := sc.QueueSubscribe("foo", "bar", mcb, stan.DeliverAllAvailable()); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
}
// Wait for all messages to be received
if err := Wait(doneCh); err != nil {
t.Fatal("Did not get our messages")
}
}
func TestQueueGroupAckTimerStoppedWhenMemberLeavesGroup(t *testing.T) {
s := runServer(t, clusterName)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
for i := 0; i < 1024; i++ {
if err := sc.Publish("foo", []byte("hello")); err != nil {
t.Fatalf("Error on publish: %v", err)
}
}
ch := make(chan error, 1)
if _, err := sc.QueueSubscribe("foo", "bar", func(m *stan.Msg) {
subs := s.clients.getSubs(clientName)
if len(subs) != 1 {
ch <- fmt.Errorf("Wrong subs len=%v", len(subs))
return
}
sub := subs[0]
m.Sub.Close()
// Wait for sub close to be processed...
waitForNumSubs(t, s, clientName, 0)
// Then check that ackTimer is not set
sub.RLock()
timerSet := sub.ackTimer != nil
sub.RUnlock()
if timerSet {
ch <- fmt.Errorf("Timer should not be set")
} else {
ch <- nil
}
}, stan.DeliverAllAvailable()); err != nil {
t.Fatalf("Error on subscribe: %v", err)
}
select {
case e := <-ch:
if e != nil {
t.Fatalf("Error: %v", e)
}
case <-time.After(5 * time.Second):
t.Fatalf("Timeout waiting for callback to fire")
}
}
func TestPersistentStoreNewOnHoldClearedAfterRestart(t *testing.T) {
cleanupDatastore(t)
defer cleanupDatastore(t)
opts := getTestDefaultOptsForPersistentStore()
s := runServerWithOpts(t, opts, nil)
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
// Create durable queue sub that does not ack messages so we
// get a pending ack on server restart.
ch := make(chan bool, 1)
if _, err := sc.QueueSubscribe("foo", "bar", func(_ *stan.Msg) {
ch <- true
}, stan.DurableName("dur"), stan.SetManualAckMode()); err != nil {
t.Fatalf("Error on subscribe: %v", err)
}
// Publish a message
if err := sc.Publish("foo", []byte("1")); err != nil {
t.Fatalf("Error on publish: %v", err)
}