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bulk_indexer_test.go
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bulk_indexer_test.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 docappender_test
import (
"context"
"encoding/json"
"net/http"
"sync/atomic"
"testing"
"time"
"github.com/klauspost/compress/gzip"
"github.com/elastic/go-docappender/v2"
"github.com/elastic/go-docappender/v2/docappendertest"
"github.com/stretchr/testify/require"
)
func TestBulkIndexer(t *testing.T) {
for _, tc := range []struct {
Name string
CompressionLevel int
}{
{Name: "no_compression", CompressionLevel: gzip.NoCompression},
{Name: "default_compression", CompressionLevel: gzip.DefaultCompression},
{Name: "most_compression", CompressionLevel: gzip.BestCompression},
{Name: "speed_compression", CompressionLevel: gzip.BestSpeed},
} {
t.Run(tc.Name, func(t *testing.T) {
var esFailing atomic.Bool
client := docappendertest.NewMockElasticsearchClient(t, func(w http.ResponseWriter, r *http.Request) {
_, result := docappendertest.DecodeBulkRequest(r)
if esFailing.Load() {
for _, itemsMap := range result.Items {
for k, item := range itemsMap {
result.HasErrors = true
item.Status = http.StatusTooManyRequests
item.Error.Type = "simulated_es_error"
item.Error.Reason = "for testing"
itemsMap[k] = item
}
}
}
json.NewEncoder(w).Encode(result)
})
indexer, err := docappender.NewBulkIndexer(docappender.BulkIndexerConfig{
Client: client,
MaxDocumentRetries: 100_000, // infinite for testing purpose
RetryOnDocumentStatus: []int{http.StatusTooManyRequests},
CompressionLevel: tc.CompressionLevel,
})
require.NoError(t, err)
generateLoad := func(count int) {
for i := 0; i < count; i++ {
require.NoError(t, indexer.Add(docappender.BulkIndexerItem{
Index: "testidx",
Body: newJSONReader(map[string]any{
"@timestamp": time.Now().Format(docappendertest.TimestampFormat),
}),
}))
}
}
itemCount := 1_000
generateLoad(itemCount)
// All items should be successfully flushed
uncompressed := indexer.UncompressedLen()
uncompressedDocSize := uncompressed / itemCount
stat, err := indexer.Flush(context.Background())
require.NoError(t, err)
require.Equal(t, int64(itemCount), stat.Indexed)
require.Equal(t, uncompressed, indexer.BytesUncompressedFlushed())
// nothing is in the buffer if all succeeded
require.Equal(t, 0, indexer.Len())
require.Equal(t, 0, indexer.UncompressedLen())
// Simulate ES failure, all items should be enqueued for retries
esFailing.Store(true)
generateLoad(itemCount)
require.Equal(t, itemCount, indexer.Items())
for i := 0; i < 10; i++ {
stat, err := indexer.Flush(context.Background())
require.NoError(t, err)
require.Equal(t, int64(0), stat.Indexed)
require.Equal(t, itemCount, len(stat.FailedDocs))
require.Equal(t, int64(itemCount), stat.RetriedDocs)
// all the flushed bytes are now in the buffer again to be retried
require.Equal(t, indexer.UncompressedLen(), indexer.BytesUncompressedFlushed())
// Generate more load, all these items should be enqueued for retries
generateLoad(10)
itemCount += 10
require.Equal(t, itemCount, indexer.Items())
expectedBufferedSize := indexer.BytesUncompressedFlushed() + (10 * uncompressedDocSize)
require.Equal(t, expectedBufferedSize, indexer.UncompressedLen())
}
uncompressedSize := indexer.UncompressedLen()
// Recover ES and ensure all items are indexed
esFailing.Store(false)
stat, err = indexer.Flush(context.Background())
require.NoError(t, err)
require.Equal(t, int64(itemCount), stat.Indexed)
require.Equal(t, uncompressedSize, indexer.BytesUncompressedFlushed())
// no documents to retry so buffer should be empty
require.Equal(t, 0, indexer.Len())
require.Equal(t, 0, indexer.UncompressedLen())
})
}
}