diff --git a/lib/protoparser/opentelemetry/firehose/parser.go b/lib/protoparser/opentelemetry/firehose/parser.go
index 7e7fb6200..e6801e3e7 100644
--- a/lib/protoparser/opentelemetry/firehose/parser.go
+++ b/lib/protoparser/opentelemetry/firehose/parser.go
@@ -1,6 +1,7 @@
 package firehose
 
 import (
+	"encoding/binary"
 	"encoding/json"
 	"fmt"
 )
@@ -32,8 +33,18 @@ func ProcessRequestBody(b []byte) ([]byte, error) {
 
 	var dst []byte
 	for _, r := range req.Records {
-		dst = append(dst, r.Data...)
+		for len(r.Data) > 0 {
+			messageLength, varIntLength := binary.Uvarint(r.Data)
+			if varIntLength > binary.MaxVarintLen32 {
+				return nil, fmt.Errorf("failed to parse OpenTelemetry message: invalid variant")
+			}
+			totalLength := varIntLength + int(messageLength)
+			if totalLength > len(r.Data) {
+				return nil, fmt.Errorf("failed to parse OpenTelementry message: insufficient length of buffer")
+			}
+			dst = append(dst, r.Data[varIntLength:totalLength]...)
+			r.Data = r.Data[totalLength:]
+		}
 	}
-
 	return dst, nil
 }
diff --git a/lib/protoparser/opentelemetry/firehose/parser_test.go b/lib/protoparser/opentelemetry/firehose/parser_test.go
index fdede8568..b5c588971 100644
--- a/lib/protoparser/opentelemetry/firehose/parser_test.go
+++ b/lib/protoparser/opentelemetry/firehose/parser_test.go
@@ -1,17 +1,33 @@
 package firehose
 
 import (
+	"bytes"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/opentelemetry/stream"
+	"strings"
 	"testing"
 )
 
 func TestProcessRequestBody(t *testing.T) {
-	data := []byte(`{"records": [{"data": "SGVsbG8sIA=="}, {"data": "d29ybGQh"}]}`)
-	result, err := ProcessRequestBody(data)
+	data := []byte(`{"requestId":"94885867-d282-4110-a3c5-4af3f9ce1150","timestamp":1709217414040,"records":[{"data":"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+	var totalTss []prompbmarshal.TimeSeries
+	err := stream.ParseStream(bytes.NewReader(data), false, ProcessRequestBody, func(tss []prompbmarshal.TimeSeries) error {
+		totalTss = append(totalTss, tss...)
+		for _, ts := range tss {
+			for _, label := range ts.Labels {
+				if label.Name == "__name__" {
+					if !strings.HasPrefix(label.Value, "amazonaws.com/AWS/EBS/VolumeReadOps") {
+						t.Fatalf("got %q, expected prefix amazonaws.com/AWS/EBS/VolumeReadOps", label.Value)
+					}
+				}
+			}
+		}
+		return nil
+	})
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	resultExpected := "Hello, world!"
-	if string(result) != resultExpected {
-		t.Fatalf("unexpected result; got %q; want %q", result, resultExpected)
+	if len(totalTss) == 0 {
+		t.Fatalf("unexpected number of series: %d", len(totalTss))
 	}
 }