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cursor not found #3884

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cursor not found #3884

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5370a32
cursor not found
noisersup Dec 19, 2023
8a24ada
Merge branch 'main' into cursor-not-found-3739
AlekSi Dec 21, 2023
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cursor not found
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@noisersup
noisersup committed Dec 19, 2023
commit 5370a323645bdf650af3479c1e8ee1efe474eb79
72 changes: 72 additions & 0 deletions integration/cursors/getmore_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ import (
"errors"
"math"
"net/url"
"sync"
"testing"

"github.com/AlekSi/pointer"
Expand Down Expand Up @@ -1095,3 +1096,74 @@ func TestCursors(t *testing.T) {
require.Equal(t, int32(175), ce.Code, "invalid error: %v", ce)
})
}

func TestCursorsStress(t *testing.T) {
t.Parallel()

// use a single connection pool
s := setup.SetupWithOpts(t, &setup.SetupOpts{
ExtraOptions: url.Values{
"minPoolSize": []string{"1"},
"maxPoolSize": []string{"1"},
},
})

ctx := s.Ctx
collection1 := s.Collection
databaseName := s.Collection.Database().Name()
collectionName := s.Collection.Name()

u, err := url.Parse(s.MongoDBURI)
require.NoError(t, err)

// client2 uses the same connection pool
client2, err := mongo.Connect(ctx, options.Client().ApplyURI(u.String()))
require.NoError(t, err)

collection2 := client2.Database(databaseName).Collection(collectionName)

arr, _ := integration.GenerateDocuments(0, 2)
_, err = collection2.InsertMany(ctx, arr)
require.NoError(t, err)

t.Run("CursorNotFoundAfterDisconnect", func(t *testing.T) {
var res bson.D
err = collection2.Database().RunCommand(ctx, bson.D{
{"find", collection2.Name()},
{"batchSize", 1},
}).Decode(&res)
require.NoError(t, err)

firstBatch, cursorID := getFirstBatch(t, res)
require.NotNil(t, firstBatch)
require.Equal(t, 1, firstBatch.Len())

var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()

command := bson.D{
{"getMore", cursorID},
{"collection", collection1.Name()},
}

for {
result := bson.M{}
err := collection1.Database().RunCommand(ctx, command).Decode(result)
if errors.Is(err, mongo.ErrNoDocuments) {
break
}

require.NoError(t, err)

}

}()

err = client2.Disconnect(ctx)
require.NoError(t, err)

wg.Wait()
})
}
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