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// Copyright 2018 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.
// +build !race
package test
import (
"fmt"
"sync"
"testing"
"github.com/nats-io/gnatsd/server"
"github.com/nats-io/go-nats"
)
// IMPORTANT: Tests in this file are not executed when running with the -race flag.
// The test name should be prefixed with TestNoRace so we can run only
// those tests: go test -run=TestNoRace ...
// As we look to improve high fanout situations make sure we
// have a test that checks ordering for all subscriptions from a single subscriber.
func TestNoRaceHighFanoutOrdering(t *testing.T) {
opts := &server.Options{Host: "127.0.0.1", Port: server.RANDOM_PORT}
s := RunServer(opts)
defer s.Shutdown()
url := fmt.Sprintf("nats://%s", s.Addr())
const (
nconns = 100
nsubs = 100
npubs = 500
)
// make unique
subj := nats.NewInbox()
var wg sync.WaitGroup
wg.Add(nconns * nsubs)
for i := 0; i < nconns; i++ {
nc, err := nats.Connect(url)
if err != nil {
t.Fatalf("Expected a successful connect on %d, got %v\n", i, err)
}
nc.SetErrorHandler(func(c *nats.Conn, s *nats.Subscription, e error) {
t.Fatalf("Got an error %v for %+v\n", s, err)
})
ec, _ := nats.NewEncodedConn(nc, nats.DEFAULT_ENCODER)
for y := 0; y < nsubs; y++ {
expected := 0
ec.Subscribe(subj, func(n int) {
if n != expected {
t.Fatalf("Expected %d but received %d\n", expected, n)
}
expected++
if expected >= npubs {
wg.Done()
}
})
}
ec.Flush()
defer ec.Close()
}
nc, _ := nats.Connect(url)
ec, _ := nats.NewEncodedConn(nc, nats.DEFAULT_ENCODER)
for i := 0; i < npubs; i++ {
ec.Publish(subj, i)
}
defer ec.Close()
wg.Wait()
}
func TestNoRaceRouteFormTimeWithHighSubscriptions(t *testing.T) {
srvA, optsA := RunServerWithConfig("./configs/srv_a.conf")
defer srvA.Shutdown()
clientA := createClientConn(t, optsA.Host, optsA.Port)
defer clientA.Close()
sendA, expectA := setupConn(t, clientA)
// Now add lots of subscriptions. These will need to be forwarded
// to new routes when they are added.
subsTotal := 100000
for i := 0; i < subsTotal; i++ {
subject := fmt.Sprintf("FOO.BAR.BAZ.%d", i)
sendA(fmt.Sprintf("SUB %s %d\r\n", subject, i))
}
sendA("PING\r\n")
expectA(pongRe)
srvB, _ := RunServerWithConfig("./configs/srv_b.conf")
defer srvB.Shutdown()
checkClusterFormed(t, srvA, srvB)
// Now wait for all subscriptions to be processed.
if err := checkExpectedSubs(subsTotal, srvB); err != nil {
// Make sure we are not a slow consumer
// Check for slow consumer status
if srvA.NumSlowConsumers() > 0 {
t.Fatal("Did not receive all subscriptions due to slow consumer")
} else {
t.Fatalf("%v", err)
}
}
// Just double check the slow consumer status.
if srvA.NumSlowConsumers() > 0 {
t.Fatalf("Received a slow consumer notification: %d", srvA.NumSlowConsumers())
}
}
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