Adding verbose logging for indexing failures

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/opensearch-project/opensearch-go v1.1.0
 	github.com/prometheus/client_golang v1.15.1
 	github.com/prometheus/common v0.44.0
+	github.com/sirupsen/logrus v1.9.3
 	github.com/stretchr/testify v1.8.2
 	gopkg.in/yaml.v3 v3.0.1
 	k8s.io/api v0.28.4

go.sum

@@ -84,6 +84,8 @@ github.com/prometheus/common v0.44.0 h1:+5BrQJwiBB9xsMygAB3TNvpQKOwlkc25LbISbrdO
 github.com/prometheus/common v0.44.0/go.mod h1:ofAIvZbQ1e/nugmZGz4/qCb9Ap1VoSTIO7x0VV9VvuY=
 github.com/prometheus/procfs v0.9.0 h1:wzCHvIvM5SxWqYvwgVL7yJY8Lz3PKn49KQtpgMYJfhI=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
@@ -123,6 +125,7 @@ golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
 golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=

indexers/elastic.go

@@ -30,6 +30,7 @@ import (
 
 	elasticsearch "github.com/elastic/go-elasticsearch/v7"
 	"github.com/elastic/go-elasticsearch/v7/esutil"
+	log "github.com/sirupsen/logrus"
 )
 
 // Elastic ElasticSearch instance
@@ -100,14 +101,17 @@ func (esIndexer *Elastic) Index(documents []interface{}, opts IndexingOpts) (str
 	for _, document := range documents {
 		j, err := json.Marshal(document)
 		if err != nil {
-			return "", fmt.Errorf("Cannot encode document %s: %s", document, err)
+			return "", fmt.Errorf("Cannot encode document %v: %s", document, err)
 		}
+
 		hasher.Write(j)
 		docId := hex.EncodeToString(hasher.Sum(nil))
 		if _, exists := docHash[docId]; exists {
-			redundantSkipped += 1
+			log.Debugf("Skipping redundant document with ID: %s", docId)
+			redundantSkipped++
 			continue
 		}
+
 		err = bi.Add(
 			context.Background(),
 			esutil.BulkIndexerItem{
@@ -119,11 +123,16 @@ func (esIndexer *Elastic) Index(documents []interface{}, opts IndexingOpts) (str
 					defer indexerStatsLock.Unlock()
 					indexerStats[biri.Result]++
 				},
+				OnFailure: func(c context.Context, bii esutil.BulkIndexerItem, biri esutil.BulkIndexerResponseItem, err error) {
+					log.Infof("Failed to index document with ID %s: %s, error: %v", bii.DocumentID, biri.Error.Reason, err)
+				},
 			},
 		)
 		if err != nil {
+			log.Infof("Error adding document with ID %s: %s", docId, err)
 			return "", fmt.Errorf("Unexpected ES indexing error: %s", err)
 		}
+
 		docHash[docId] = true
 		hasher.Reset()
 	}

indexers/factory_test.go

@@ -2,9 +2,9 @@ package indexers
 
 import (
 	"errors"
+	"log"
 	"net/http"
 	"net/http/httptest"
-	"log"
 
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"

indexers/opensearch.go

@@ -30,6 +30,7 @@ import (
 
 	opensearch "github.com/opensearch-project/opensearch-go"
 	opensearchutil "github.com/opensearch-project/opensearch-go/opensearchutil"
+	log "github.com/sirupsen/logrus"
 )
 
 // OSClient OpenSearch client instance
@@ -100,14 +101,17 @@ func (OpenSearchIndexer *OpenSearch) Index(documents []interface{}, opts Indexin
 	for _, document := range documents {
 		j, err := json.Marshal(document)
 		if err != nil {
-			return "", fmt.Errorf("Cannot encode document %s: %s", document, err)
+			return "", fmt.Errorf("Cannot encode document %v: %s", document, err)
 		}
+
 		hasher.Write(j)
 		docId := hex.EncodeToString(hasher.Sum(nil))
 		if _, exists := docHash[docId]; exists {
-			redundantSkipped += 1
+			log.Debugf("Skipping redundant document: %s", docId)
+			redundantSkipped++
 			continue
 		}
+
 		err = bi.Add(
 			context.Background(),
 			opensearchutil.BulkIndexerItem{
@@ -119,9 +123,13 @@ func (OpenSearchIndexer *OpenSearch) Index(documents []interface{}, opts Indexin
 					defer indexerStatsLock.Unlock()
 					indexerStats[biri.Result]++
 				},
+				OnFailure: func(c context.Context, bii opensearchutil.BulkIndexerItem, beri opensearchutil.BulkIndexerResponseItem, err error) {
+					log.Infof("Failed to index document %s: %s, error: %v", bii.DocumentID, beri.Error.Reason, err)
+				},
 			},
 		)
 		if err != nil {
+			log.Infof("Error adding document with ID %s: %s", docId, err)
 			return "", fmt.Errorf("Unexpected OpenSearch indexing error: %s", err)
 		}
 		docHash[docId] = true