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client_test.go
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package sarama
import (
"errors"
"io"
"sync"
"sync/atomic"
"syscall"
"testing"
"time"
"github.com/rcrowley/go-metrics"
)
func safeClose(t testing.TB, c io.Closer) {
t.Helper()
err := c.Close()
if err != nil {
t.Error(err)
}
}
func TestSimpleClient(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
seedBroker.Returns(new(MetadataResponse))
client, err := NewClient([]string{seedBroker.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
seedBroker.Close()
safeClose(t, client)
}
func TestCachedPartitions(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
replicas := []int32{3, 1, 5}
isr := []int32{5, 1}
metadataResponse := new(MetadataResponse)
metadataResponse.AddBroker("localhost:12345", 2)
metadataResponse.AddTopicPartition("my_topic", 0, 2, replicas, isr, []int32{}, ErrNoError)
metadataResponse.AddTopicPartition("my_topic", 1, 2, replicas, isr, []int32{}, ErrLeaderNotAvailable)
seedBroker.Returns(metadataResponse)
config := NewTestConfig()
config.Metadata.Retry.Max = 0
c, err := NewClient([]string{seedBroker.Addr()}, config)
if err != nil {
t.Fatal(err)
}
defer safeClose(t, c)
client := c.(*client)
// Verify they aren't cached the same
allP := client.cachedPartitionsResults["my_topic"][allPartitions]
writeP := client.cachedPartitionsResults["my_topic"][writablePartitions]
if len(allP) == len(writeP) {
t.Fatal("Invalid lengths!")
}
tmp := client.cachedPartitionsResults["my_topic"]
// Verify we actually use the cache at all!
tmp[allPartitions] = []int32{1, 2, 3, 4}
client.cachedPartitionsResults["my_topic"] = tmp
if len(client.cachedPartitions("my_topic", allPartitions)) != 4 {
t.Fatal("Not using the cache!")
}
seedBroker.Close()
}
func TestClientDoesntCachePartitionsForTopicsWithErrors(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
replicas := []int32{seedBroker.BrokerID()}
metadataResponse := new(MetadataResponse)
metadataResponse.AddBroker(seedBroker.Addr(), seedBroker.BrokerID())
metadataResponse.AddTopicPartition("my_topic", 1, replicas[0], replicas, replicas, []int32{}, ErrNoError)
metadataResponse.AddTopicPartition("my_topic", 2, replicas[0], replicas, replicas, []int32{}, ErrNoError)
seedBroker.Returns(metadataResponse)
config := NewTestConfig()
config.Metadata.Retry.Max = 0
client, err := NewClient([]string{seedBroker.Addr()}, config)
if err != nil {
t.Fatal(err)
}
metadataResponse = new(MetadataResponse)
metadataResponse.AddTopic("unknown", ErrUnknownTopicOrPartition)
seedBroker.Returns(metadataResponse)
partitions, err := client.Partitions("unknown")
if !errors.Is(err, ErrUnknownTopicOrPartition) {
t.Error("Expected ErrUnknownTopicOrPartition, found", err)
}
if partitions != nil {
t.Errorf("Should return nil as partition list, found %v", partitions)
}
// Should still use the cache of a known topic
_, err = client.Partitions("my_topic")
if err != nil {
t.Errorf("Expected no error, found %v", err)
}
metadataResponse = new(MetadataResponse)
metadataResponse.AddTopic("unknown", ErrUnknownTopicOrPartition)
seedBroker.Returns(metadataResponse)
// Should not use cache for unknown topic
partitions, err = client.Partitions("unknown")
if !errors.Is(err, ErrUnknownTopicOrPartition) {
t.Error("Expected ErrUnknownTopicOrPartition, found", err)
}
if partitions != nil {
t.Errorf("Should return nil as partition list, found %v", partitions)
}
seedBroker.Close()
safeClose(t, client)
}
func TestClientSeedBrokers(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
metadataResponse := new(MetadataResponse)
metadataResponse.AddBroker("localhost:12345", 2)
seedBroker.Returns(metadataResponse)
client, err := NewClient([]string{seedBroker.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
seedBroker.Close()
safeClose(t, client)
}
func TestClientMetadata(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
leader := NewMockBroker(t, 5)
replicas := []int32{3, 1, 5}
isr := []int32{5, 1}
metadataResponse := new(MetadataResponse)
metadataResponse.AddBroker(leader.Addr(), leader.BrokerID())
metadataResponse.AddTopicPartition("my_topic", 0, leader.BrokerID(), replicas, isr, []int32{}, ErrNoError)
metadataResponse.AddTopicPartition("my_topic", 1, leader.BrokerID(), replicas, isr, []int32{}, ErrLeaderNotAvailable)
seedBroker.Returns(metadataResponse)
config := NewTestConfig()
config.Metadata.Retry.Max = 0
client, err := NewClient([]string{seedBroker.Addr()}, config)
if err != nil {
t.Fatal(err)
}
topics, err := client.Topics()
if err != nil {
t.Error(err)
} else if len(topics) != 1 || topics[0] != "my_topic" {
t.Error("Client returned incorrect topics:", topics)
}
parts, err := client.Partitions("my_topic")
if err != nil {
t.Error(err)
} else if len(parts) != 2 || parts[0] != 0 || parts[1] != 1 {
t.Error("Client returned incorrect partitions for my_topic:", parts)
}
parts, err = client.WritablePartitions("my_topic")
if err != nil {
t.Error(err)
} else if len(parts) != 1 || parts[0] != 0 {
t.Error("Client returned incorrect writable partitions for my_topic:", parts)
}
tst, err := client.Leader("my_topic", 0)
if err != nil {
t.Error(err)
} else if tst.ID() != 5 {
t.Error("Leader for my_topic had incorrect ID.")
}
replicas, err = client.Replicas("my_topic", 0)
if err != nil {
t.Error(err)
} else if replicas[0] != 3 {
t.Error("Incorrect (or sorted) replica")
} else if replicas[1] != 1 {
t.Error("Incorrect (or sorted) replica")
} else if replicas[2] != 5 {
t.Error("Incorrect (or sorted) replica")
}
isr, err = client.InSyncReplicas("my_topic", 0)
if err != nil {
t.Error(err)
} else if len(isr) != 2 {
t.Error("Client returned incorrect ISRs for partition:", isr)
} else if isr[0] != 5 {
t.Error("Incorrect (or sorted) ISR:", isr)
} else if isr[1] != 1 {
t.Error("Incorrect (or sorted) ISR:", isr)
}
leader.Close()
seedBroker.Close()
safeClose(t, client)
}
func TestClientMetadataWithOfflineReplicas(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
leader := NewMockBroker(t, 5)
replicas := []int32{1, 2, 3}
isr := []int32{1, 2}
offlineReplicas := []int32{3}
metadataResponse := new(MetadataResponse)
metadataResponse.AddBroker(leader.Addr(), leader.BrokerID())
metadataResponse.AddTopicPartition("my_topic", 0, leader.BrokerID(), replicas, isr, offlineReplicas, ErrNoError)
metadataResponse.AddTopicPartition("my_topic", 1, leader.BrokerID(), replicas, isr, []int32{}, ErrNoError)
metadataResponse.Version = 5
seedBroker.Returns(metadataResponse)
config := NewTestConfig()
config.Version = V1_0_0_0
config.Metadata.Retry.Max = 0
client, err := NewClient([]string{seedBroker.Addr()}, config)
if err != nil {
t.Fatal(err)
}
topics, err := client.Topics()
if err != nil {
t.Error(err)
} else if len(topics) != 1 || topics[0] != "my_topic" {
t.Error("Client returned incorrect topics:", topics)
}
parts, err := client.Partitions("my_topic")
if err != nil {
t.Error(err)
} else if len(parts) != 2 || parts[0] != 0 || parts[1] != 1 {
t.Error("Client returned incorrect partitions for my_topic:", parts)
}
parts, err = client.WritablePartitions("my_topic")
if err != nil {
t.Error(err)
} else if len(parts) != 2 {
t.Error("Client returned incorrect writable partitions for my_topic:", parts)
}
tst, err := client.Leader("my_topic", 0)
if err != nil {
t.Error(err)
} else if tst.ID() != 5 {
t.Error("Leader for my_topic had incorrect ID.")
}
replicas, err = client.Replicas("my_topic", 0)
if err != nil {
t.Error(err)
} else if replicas[0] != 1 {
t.Error("Incorrect (or sorted) replica")
} else if replicas[1] != 2 {
t.Error("Incorrect (or sorted) replica")
} else if replicas[2] != 3 {
t.Error("Incorrect (or sorted) replica")
}
isr, err = client.InSyncReplicas("my_topic", 0)
if err != nil {
t.Error(err)
} else if len(isr) != 2 {
t.Error("Client returned incorrect ISRs for partition:", isr)
} else if isr[0] != 1 {
t.Error("Incorrect (or sorted) ISR:", isr)
} else if isr[1] != 2 {
t.Error("Incorrect (or sorted) ISR:", isr)
}
offlineReplicas, err = client.OfflineReplicas("my_topic", 0)
if err != nil {
t.Error(err)
} else if len(offlineReplicas) != 1 {
t.Error("Client returned incorrect offline replicas for partition:", offlineReplicas)
} else if offlineReplicas[0] != 3 {
t.Error("Incorrect offline replica:", offlineReplicas)
}
leader.Close()
seedBroker.Close()
safeClose(t, client)
}
func TestClientGetOffset(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
leader := NewMockBroker(t, 2)
leaderAddr := leader.Addr()
metadata := new(MetadataResponse)
metadata.AddTopicPartition("foo", 0, leader.BrokerID(), nil, nil, nil, ErrNoError)
metadata.AddBroker(leaderAddr, leader.BrokerID())
seedBroker.Returns(metadata)
client, err := NewClient([]string{seedBroker.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
offsetResponse := new(OffsetResponse)
offsetResponse.AddTopicPartition("foo", 0, 123)
leader.Returns(offsetResponse)
offset, err := client.GetOffset("foo", 0, OffsetNewest)
if err != nil {
t.Error(err)
}
if offset != 123 {
t.Error("Unexpected offset, got ", offset)
}
leader.Close()
leader = NewMockBrokerAddr(t, 2, leaderAddr)
offsetResponse = new(OffsetResponse)
offsetResponse.AddTopicPartition("foo", 0, 456)
leader.Returns(metadata)
leader.Returns(offsetResponse)
offset, err = client.GetOffset("foo", 0, OffsetNewest)
if err != nil {
t.Error(err)
}
if offset != 456 {
t.Error("Unexpected offset, got ", offset)
}
seedBroker.Close()
leader.Close()
safeClose(t, client)
}
func TestClientReceivingUnknownTopicWithBackoffFunc(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
metadataResponse1 := new(MetadataResponse)
seedBroker.Returns(metadataResponse1)
retryCount := int32(0)
config := NewTestConfig()
config.Metadata.Retry.Max = 1
config.Metadata.Retry.BackoffFunc = func(retries, maxRetries int) time.Duration {
atomic.AddInt32(&retryCount, 1)
return 0
}
client, err := NewClient([]string{seedBroker.Addr()}, config)
if err != nil {
t.Fatal(err)
}
metadataUnknownTopic := new(MetadataResponse)
metadataUnknownTopic.AddTopic("new_topic", ErrUnknownTopicOrPartition)
seedBroker.Returns(metadataUnknownTopic)
seedBroker.Returns(metadataUnknownTopic)
if err := client.RefreshMetadata("new_topic"); !errors.Is(err, ErrUnknownTopicOrPartition) {
t.Error("ErrUnknownTopicOrPartition expected, got", err)
}
safeClose(t, client)
seedBroker.Close()
actualRetryCount := atomic.LoadInt32(&retryCount)
if actualRetryCount != 1 {
t.Fatalf("Expected BackoffFunc to be called exactly once, but saw %d", actualRetryCount)
}
}
func TestClientReceivingUnknownTopic(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
metadataResponse1 := new(MetadataResponse)
seedBroker.Returns(metadataResponse1)
config := NewTestConfig()
config.Metadata.Retry.Max = 1
config.Metadata.Retry.Backoff = 0
client, err := NewClient([]string{seedBroker.Addr()}, config)
if err != nil {
t.Fatal(err)
}
metadataUnknownTopic := new(MetadataResponse)
metadataUnknownTopic.AddTopic("new_topic", ErrUnknownTopicOrPartition)
seedBroker.Returns(metadataUnknownTopic)
seedBroker.Returns(metadataUnknownTopic)
if err := client.RefreshMetadata("new_topic"); !errors.Is(err, ErrUnknownTopicOrPartition) {
t.Error("ErrUnknownTopicOrPartition expected, got", err)
}
// If we are asking for the leader of a partition of the non-existing topic.
// we will request metadata again.
seedBroker.Returns(metadataUnknownTopic)
seedBroker.Returns(metadataUnknownTopic)
if _, err = client.Leader("new_topic", 1); !errors.Is(err, ErrUnknownTopicOrPartition) {
t.Error("Expected ErrUnknownTopicOrPartition, got", err)
}
safeClose(t, client)
seedBroker.Close()
}
func TestClientReceivingPartialMetadata(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
leader := NewMockBroker(t, 5)
metadataResponse1 := new(MetadataResponse)
metadataResponse1.AddBroker(leader.Addr(), leader.BrokerID())
seedBroker.Returns(metadataResponse1)
config := NewTestConfig()
config.Metadata.Retry.Max = 0
client, err := NewClient([]string{seedBroker.Addr()}, config)
if err != nil {
t.Fatal(err)
}
replicas := []int32{leader.BrokerID(), seedBroker.BrokerID()}
metadataPartial := new(MetadataResponse)
metadataPartial.AddBroker(leader.Addr(), 5)
metadataPartial.AddTopic("new_topic", ErrLeaderNotAvailable)
metadataPartial.AddTopicPartition("new_topic", 0, leader.BrokerID(), replicas, replicas, []int32{}, ErrNoError)
metadataPartial.AddTopicPartition("new_topic", 1, -1, replicas, []int32{}, []int32{}, ErrLeaderNotAvailable)
leader.Returns(metadataPartial)
if err := client.RefreshMetadata("new_topic"); err != nil {
t.Error("ErrLeaderNotAvailable should not make RefreshMetadata respond with an error")
}
// Even though the metadata was incomplete, we should be able to get the leader of a partition
// for which we did get a useful response, without doing additional requests.
partition0Leader, err := client.Leader("new_topic", 0)
if err != nil {
t.Error(err)
} else if partition0Leader.Addr() != leader.Addr() {
t.Error("Unexpected leader returned", partition0Leader.Addr())
}
// If we are asking for the leader of a partition that didn't have a leader before,
// we will do another metadata request.
leader.Returns(metadataPartial)
// Still no leader for the partition, so asking for it should return an error.
_, err = client.Leader("new_topic", 1)
if !errors.Is(err, ErrLeaderNotAvailable) {
t.Error("Expected ErrLeaderNotAvailable, got", err)
}
safeClose(t, client)
seedBroker.Close()
leader.Close()
}
func TestClientRefreshBehaviour(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
leader := NewMockBroker(t, 5)
metadataResponse1 := new(MetadataResponse)
metadataResponse1.AddBroker(leader.Addr(), leader.BrokerID())
seedBroker.Returns(metadataResponse1)
metadataResponse2 := new(MetadataResponse)
metadataResponse2.AddBroker(leader.Addr(), leader.BrokerID())
metadataResponse2.AddTopicPartition("my_topic", 0xb, leader.BrokerID(), nil, nil, nil, ErrNoError)
leader.Returns(metadataResponse2)
client, err := NewClient([]string{seedBroker.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
parts, err := client.Partitions("my_topic")
if err != nil {
t.Error(err)
} else if len(parts) != 1 || parts[0] != 0xb {
t.Error("Client returned incorrect partitions for my_topic:", parts)
}
tst, err := client.Leader("my_topic", 0xb)
if err != nil {
t.Error(err)
} else if tst.ID() != 5 {
t.Error("Leader for my_topic had incorrect ID.")
}
leader.Close()
seedBroker.Close()
safeClose(t, client)
}
func TestClientRefreshBrokers(t *testing.T) {
initialSeed := NewMockBroker(t, 0)
defer initialSeed.Close()
leader := NewMockBroker(t, 5)
defer leader.Close()
metadataResponse1 := new(MetadataResponse)
metadataResponse1.AddBroker(leader.Addr(), leader.BrokerID())
metadataResponse1.AddBroker(initialSeed.Addr(), initialSeed.BrokerID())
initialSeed.Returns(metadataResponse1)
c, err := NewClient([]string{initialSeed.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
defer c.Close()
client := c.(*client)
if len(client.Brokers()) != 2 {
t.Error("Meta broker is not 2")
}
newSeedBrokers := []string{"localhost:12345"}
_ = client.RefreshBrokers(newSeedBrokers)
if client.seedBrokers[0].addr != newSeedBrokers[0] {
t.Error("Seed broker not updated")
}
if len(client.Brokers()) != 0 {
t.Error("Old brokers not closed")
}
}
func TestClientRefreshMetadataBrokerOffline(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
defer seedBroker.Close()
leader := NewMockBroker(t, 5)
defer leader.Close()
metadataResponse1 := new(MetadataResponse)
metadataResponse1.AddBroker(leader.Addr(), leader.BrokerID())
metadataResponse1.AddBroker(seedBroker.Addr(), seedBroker.BrokerID())
seedBroker.Returns(metadataResponse1)
client, err := NewClient([]string{seedBroker.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
defer client.Close()
if len(client.Brokers()) != 2 {
t.Error("Meta broker is not 2")
}
metadataResponse2 := NewMockMetadataResponse(t).SetBroker(leader.Addr(), leader.BrokerID())
seedBroker.SetHandlerByMap(map[string]MockResponse{
"MetadataRequest": metadataResponse2,
})
leader.SetHandlerByMap(map[string]MockResponse{
"MetadataRequest": metadataResponse2,
})
if err := client.RefreshMetadata(); err != nil {
t.Error(err)
}
if len(client.Brokers()) != 1 {
t.Error("Meta broker is not 1")
}
}
func TestClientGetBroker(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
defer seedBroker.Close()
leader := NewMockBroker(t, 5)
defer leader.Close()
metadataResponse1 := new(MetadataResponse)
metadataResponse1.AddBroker(leader.Addr(), leader.BrokerID())
metadataResponse1.AddBroker(seedBroker.Addr(), seedBroker.BrokerID())
seedBroker.Returns(metadataResponse1)
client, err := NewClient([]string{seedBroker.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
defer client.Close()
broker, err := client.Broker(leader.BrokerID())
if err != nil {
t.Fatal(err)
}
if broker.Addr() != leader.Addr() {
t.Errorf("Expected broker to have address %s, found %s", leader.Addr(), broker.Addr())
}
metadataResponse2 := NewMockMetadataResponse(t).SetBroker(seedBroker.Addr(), seedBroker.BrokerID())
seedBroker.SetHandlerByMap(map[string]MockResponse{
"MetadataRequest": metadataResponse2,
})
leader.SetHandlerByMap(map[string]MockResponse{
"MetadataRequest": metadataResponse2,
})
if err := client.RefreshMetadata(); err != nil {
t.Error(err)
}
_, err = client.Broker(leader.BrokerID())
if !errors.Is(err, ErrBrokerNotFound) {
t.Errorf("Expected Broker(brokerID) to return %v found %v", ErrBrokerNotFound, err)
}
}
func TestClientResurrectDeadSeeds(t *testing.T) {
initialSeed := NewMockBroker(t, 0)
emptyMetadata := new(MetadataResponse)
initialSeed.Returns(emptyMetadata)
conf := NewTestConfig()
conf.Metadata.Retry.Backoff = 0
conf.Metadata.RefreshFrequency = 0
c, err := NewClient([]string{initialSeed.Addr()}, conf)
if err != nil {
t.Fatal(err)
}
initialSeed.Close()
client := c.(*client)
seed1 := NewMockBroker(t, 1)
seed2 := NewMockBroker(t, 2)
seed3 := NewMockBroker(t, 3)
addr1 := seed1.Addr()
addr2 := seed2.Addr()
addr3 := seed3.Addr()
// Overwrite the seed brokers with a fixed ordering to make this test deterministic.
safeClose(t, client.seedBrokers[0])
client.seedBrokers = []*Broker{NewBroker(addr1), NewBroker(addr2), NewBroker(addr3)}
client.deadSeeds = []*Broker{}
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
if err := client.RefreshMetadata(); err != nil {
t.Error(err)
}
wg.Done()
}()
seed1.Close()
seed2.Close()
seed1 = NewMockBrokerAddr(t, 1, addr1)
seed2 = NewMockBrokerAddr(t, 2, addr2)
seed3.Close()
seed1.Close()
seed2.Returns(emptyMetadata)
wg.Wait()
if len(client.seedBrokers) != 2 {
t.Error("incorrect number of live seeds")
}
if len(client.deadSeeds) != 1 {
t.Error("incorrect number of dead seeds")
}
seed2.Close()
safeClose(t, c)
}
//nolint:paralleltest
func TestClientController(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
defer seedBroker.Close()
controllerBroker := NewMockBroker(t, 2)
defer controllerBroker.Close()
seedBroker.SetHandlerByMap(map[string]MockResponse{
"MetadataRequest": NewMockMetadataResponse(t).
SetController(controllerBroker.BrokerID()).
SetBroker(seedBroker.Addr(), seedBroker.BrokerID()).
SetBroker(controllerBroker.Addr(), controllerBroker.BrokerID()),
})
cfg := NewTestConfig()
// test kafka version greater than 0.10.0.0
t.Run("V0_10_0_0", func(t *testing.T) {
cfg.Version = V0_10_0_0
client1, err := NewClient([]string{seedBroker.Addr()}, cfg)
if err != nil {
t.Fatal(err)
}
defer safeClose(t, client1)
broker, err := client1.Controller()
if err != nil {
t.Fatal(err)
}
if broker.Addr() != controllerBroker.Addr() {
t.Errorf("Expected controller to have address %s, found %s", controllerBroker.Addr(), broker.Addr())
}
})
// test kafka version earlier than 0.10.0.0
t.Run("V0_9_0_1", func(t *testing.T) {
cfg.Version = V0_9_0_1
client2, err := NewClient([]string{seedBroker.Addr()}, cfg)
if err != nil {
t.Fatal(err)
}
defer safeClose(t, client2)
if _, err = client2.Controller(); !errors.Is(err, ErrUnsupportedVersion) {
t.Errorf("Expected Controller() to return %s, found %s", ErrUnsupportedVersion, err)
}
})
}
func TestClientMetadataTimeout(t *testing.T) {
tests := []struct {
name string
timeout time.Duration
}{
{
"timeout=250ms",
250 * time.Millisecond, // Will cut the first retry pass
},
{
"timeout=500ms",
500 * time.Millisecond, // Will cut the second retry pass
},
{
"timeout=750ms",
750 * time.Millisecond, // Will cut the third retry pass
},
{
"timeout=900ms",
900 * time.Millisecond, // Will stop after the three retries
},
}
for _, tc := range tests {
tc := tc
t.Run(tc.name, func(t *testing.T) {
// Use a responsive broker to create a working client
initialSeed := NewMockBroker(t, 0)
emptyMetadata := new(MetadataResponse)
initialSeed.Returns(emptyMetadata)
conf := NewTestConfig()
// Speed up the metadata request failure because of a read timeout
conf.Net.ReadTimeout = 100 * time.Millisecond
// Disable backoff and refresh
conf.Metadata.Retry.Backoff = 0
conf.Metadata.RefreshFrequency = 0
// But configure a "global" timeout
conf.Metadata.Timeout = tc.timeout
c, err := NewClient([]string{initialSeed.Addr()}, conf)
if err != nil {
t.Fatal(err)
}
initialSeed.Close()
client := c.(*client)
// Start seed brokers that do not reply to anything and therefore a read
// on the TCP connection will timeout to simulate unresponsive brokers
seed1 := NewMockBroker(t, 1)
defer seed1.Close()
seed2 := NewMockBroker(t, 2)
defer seed2.Close()
// Overwrite the seed brokers with a fixed ordering to make this test deterministic
safeClose(t, client.seedBrokers[0])
client.seedBrokers = []*Broker{NewBroker(seed1.Addr()), NewBroker(seed2.Addr())}
client.deadSeeds = []*Broker{}
// Start refreshing metadata in the background
errChan := make(chan error)
go func() {
errChan <- c.RefreshMetadata()
}()
// Check that the refresh fails fast enough (less than twice the configured timeout)
// instead of at least: 100 ms * 2 brokers * 3 retries = 800 ms
maxRefreshDuration := 2 * tc.timeout
select {
case err := <-errChan:
if err == nil {
t.Fatal("Expected failed RefreshMetadata, got nil")
}
if !errors.Is(err, ErrOutOfBrokers) {
t.Error("Expected failed RefreshMetadata with ErrOutOfBrokers, got:", err)
}
case <-time.After(maxRefreshDuration):
t.Fatalf("RefreshMetadata did not fail fast enough after waiting for %v", maxRefreshDuration)
}
safeClose(t, c)
})
}
}
func TestClientUpdateMetadataErrorAndRetry(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
metadataResponse1 := new(MetadataResponse)
metadataResponse1.AddBroker(seedBroker.Addr(), 1)
seedBroker.Returns(metadataResponse1)
config := NewTestConfig()
config.Metadata.Retry.Max = 3
config.Metadata.Retry.Backoff = 200 * time.Millisecond
config.Metadata.RefreshFrequency = 0
config.Net.ReadTimeout = 10 * time.Millisecond
config.Net.WriteTimeout = 10 * time.Millisecond
client, err := NewClient([]string{seedBroker.Addr()}, config)
if err != nil {
t.Fatal(err)
}
waitGroup := sync.WaitGroup{}
waitGroup.Add(10)
for i := 0; i < 10; i++ {
go func() {
defer waitGroup.Done()
var failedMetadataResponse MetadataResponse
failedMetadataResponse.AddBroker(seedBroker.Addr(), 1)
failedMetadataResponse.AddTopic("new_topic", ErrUnknownTopicOrPartition)
seedBroker.Returns(&failedMetadataResponse)
err := client.RefreshMetadata()
if err == nil {
t.Error("should return error")
return
}
}()
}
waitGroup.Wait()
safeClose(t, client)
seedBroker.Close()
}
func TestClientCoordinatorWithConsumerOffsetsTopic(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
coordinator := NewMockBroker(t, 2)
replicas := []int32{coordinator.BrokerID()}
metadataResponse1 := new(MetadataResponse)
metadataResponse1.AddBroker(coordinator.Addr(), coordinator.BrokerID())
metadataResponse1.AddTopicPartition("__consumer_offsets", 0, replicas[0], replicas, replicas, []int32{}, ErrNoError)
seedBroker.Returns(metadataResponse1)
client, err := NewClient([]string{seedBroker.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
coordinatorResponse1 := new(ConsumerMetadataResponse)
coordinatorResponse1.Err = ErrConsumerCoordinatorNotAvailable
coordinator.Returns(coordinatorResponse1)
coordinatorResponse2 := new(ConsumerMetadataResponse)
coordinatorResponse2.CoordinatorID = coordinator.BrokerID()
coordinatorResponse2.CoordinatorHost = "127.0.0.1"
coordinatorResponse2.CoordinatorPort = coordinator.Port()
coordinator.Returns(coordinatorResponse2)
broker, err := client.Coordinator("my_group")
if err != nil {
t.Error(err)
}
if coordinator.Addr() != broker.Addr() {
t.Errorf("Expected coordinator to have address %s, found %s", coordinator.Addr(), broker.Addr())
}
if coordinator.BrokerID() != broker.ID() {
t.Errorf("Expected coordinator to have ID %d, found %d", coordinator.BrokerID(), broker.ID())
}
// Grab the cached value
broker2, err := client.Coordinator("my_group")
if err != nil {
t.Error(err)
}
if broker2.Addr() != broker.Addr() {
t.Errorf("Expected the coordinator to be the same, but found %s vs. %s", broker2.Addr(), broker.Addr())
}
coordinator.Close()
seedBroker.Close()
safeClose(t, client)
}
func TestClientCoordinatorChangeWithConsumerOffsetsTopic(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
staleCoordinator := NewMockBroker(t, 2)
freshCoordinator := NewMockBroker(t, 3)
replicas := []int32{staleCoordinator.BrokerID(), freshCoordinator.BrokerID()}
metadataResponse1 := new(MetadataResponse)
metadataResponse1.AddBroker(staleCoordinator.Addr(), staleCoordinator.BrokerID())
metadataResponse1.AddBroker(freshCoordinator.Addr(), freshCoordinator.BrokerID())
metadataResponse1.AddTopicPartition("__consumer_offsets", 0, replicas[0], replicas, replicas, []int32{}, ErrNoError)
seedBroker.Returns(metadataResponse1)
client, err := NewClient([]string{seedBroker.Addr()}, NewTestConfig())
if err != nil {
t.Fatal(err)
}
findCoordinatorResponse := NewMockFindCoordinatorResponse(t).SetCoordinator(CoordinatorGroup, "my_group", staleCoordinator)
staleCoordinator.SetHandlerByMap(map[string]MockResponse{
"FindCoordinatorRequest": findCoordinatorResponse,
})
freshCoordinator.SetHandlerByMap(map[string]MockResponse{
"FindCoordinatorRequest": findCoordinatorResponse,
})
broker, err := client.Coordinator("my_group")
if err != nil {
t.Error(err)
}
if staleCoordinator.Addr() != broker.Addr() {
t.Errorf("Expected coordinator to have address %s, found %s", staleCoordinator.Addr(), broker.Addr())
}
if staleCoordinator.BrokerID() != broker.ID() {
t.Errorf("Expected coordinator to have ID %d, found %d", staleCoordinator.BrokerID(), broker.ID())
}
// Grab the cached value
broker2, err := client.Coordinator("my_group")
if err != nil {
t.Error(err)
}
if broker2.Addr() != broker.Addr() {
t.Errorf("Expected the coordinator to be the same, but found %s vs. %s", broker2.Addr(), broker.Addr())
}
findCoordinatorResponse2 := NewMockFindCoordinatorResponse(t).SetCoordinator(CoordinatorGroup, "my_group", freshCoordinator)
staleCoordinator.SetHandlerByMap(map[string]MockResponse{
"FindCoordinatorRequest": findCoordinatorResponse2,
})
freshCoordinator.SetHandlerByMap(map[string]MockResponse{
"FindCoordinatorRequest": findCoordinatorResponse2,
})
// Refresh the locally cached value because it's stale
if err := client.RefreshCoordinator("my_group"); err != nil {
t.Error(err)
}
// Grab the fresh value
broker3, err := client.Coordinator("my_group")
if err != nil {
t.Error(err)
}
if broker3.Addr() != freshCoordinator.Addr() {
t.Errorf("Expected the freshCoordinator to be returned, but found %s.", broker3.Addr())
}
freshCoordinator.Close()
staleCoordinator.Close()
seedBroker.Close()
safeClose(t, client)
}
func TestClientCoordinatorWithoutConsumerOffsetsTopic(t *testing.T) {
seedBroker := NewMockBroker(t, 1)
coordinator := NewMockBroker(t, 2)
metadataResponse1 := new(MetadataResponse)
seedBroker.Returns(metadataResponse1)