[chore]: enable perfsprint linter for receivers

receiver/aerospikereceiver/client.go

@@ -5,7 +5,6 @@ package aerospikereceiver // import "github.com/open-telemetry/opentelemetry-col
 
 import (
 	"crypto/tls"
-	"fmt"
 	"strings"
 	"sync"
 	"time"
@@ -266,7 +265,7 @@ func allNamespaceInfo(n cluster.Node, policy *as.InfoPolicy) (metricsMap, error)
 
 	commands := make([]string, len(names))
 	for i, name := range names {
-		commands[i] = fmt.Sprintf("namespace/%s", name)
+		commands[i] = "namespace/" + name
 	}
 
 	res, err = n.RequestInfo(policy, commands...)

receiver/apachesparkreceiver/scraper.go

@@ -126,122 +126,122 @@ func (s *sparkScraper) scrape(_ context.Context) (pmetric.Metrics, error) {
 }
 
 func (s *sparkScraper) recordCluster(clusterStats *models.ClusterProperties, now pcommon.Timestamp, appID string, appName string) {
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.BlockManager.disk.diskSpaceUsed_MB", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.BlockManager.disk.diskSpaceUsed_MB"]; ok {
 		s.mb.RecordSparkDriverBlockManagerDiskUsageDataPoint(now, int64(stat.Value))
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.BlockManager.memory.offHeapMemUsed_MB", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.BlockManager.memory.offHeapMemUsed_MB"]; ok {
 		s.mb.RecordSparkDriverBlockManagerMemoryUsageDataPoint(now, int64(stat.Value), metadata.AttributeLocationOffHeap, metadata.AttributeStateUsed)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.BlockManager.memory.onHeapMemUsed_MB", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.BlockManager.memory.onHeapMemUsed_MB"]; ok {
 		s.mb.RecordSparkDriverBlockManagerMemoryUsageDataPoint(now, int64(stat.Value), metadata.AttributeLocationOnHeap, metadata.AttributeStateUsed)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.BlockManager.memory.remainingOffHeapMem_MB", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.BlockManager.memory.remainingOffHeapMem_MB"]; ok {
 		s.mb.RecordSparkDriverBlockManagerMemoryUsageDataPoint(now, int64(stat.Value), metadata.AttributeLocationOffHeap, metadata.AttributeStateFree)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.BlockManager.memory.remainingOnHeapMem_MB", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.BlockManager.memory.remainingOnHeapMem_MB"]; ok {
 		s.mb.RecordSparkDriverBlockManagerMemoryUsageDataPoint(now, int64(stat.Value), metadata.AttributeLocationOnHeap, metadata.AttributeStateFree)
 	}
 
-	if stat, ok := clusterStats.Counters[fmt.Sprintf("%s.driver.HiveExternalCatalog.fileCacheHits", appID)]; ok {
+	if stat, ok := clusterStats.Counters[appID+".driver.HiveExternalCatalog.fileCacheHits"]; ok {
 		s.mb.RecordSparkDriverHiveExternalCatalogFileCacheHitsDataPoint(now, stat.Count)
 	}
-	if stat, ok := clusterStats.Counters[fmt.Sprintf("%s.driver.HiveExternalCatalog.filesDiscovered", appID)]; ok {
+	if stat, ok := clusterStats.Counters[appID+".driver.HiveExternalCatalog.filesDiscovered"]; ok {
 		s.mb.RecordSparkDriverHiveExternalCatalogFilesDiscoveredDataPoint(now, stat.Count)
 	}
-	if stat, ok := clusterStats.Counters[fmt.Sprintf("%s.driver.HiveExternalCatalog.hiveClientCalls", appID)]; ok {
+	if stat, ok := clusterStats.Counters[appID+".driver.HiveExternalCatalog.hiveClientCalls"]; ok {
 		s.mb.RecordSparkDriverHiveExternalCatalogHiveClientCallsDataPoint(now, stat.Count)
 	}
-	if stat, ok := clusterStats.Counters[fmt.Sprintf("%s.driver.HiveExternalCatalog.parallelListingJobCount", appID)]; ok {
+	if stat, ok := clusterStats.Counters[appID+".driver.HiveExternalCatalog.parallelListingJobCount"]; ok {
 		s.mb.RecordSparkDriverHiveExternalCatalogParallelListingJobsDataPoint(now, stat.Count)
 	}
-	if stat, ok := clusterStats.Counters[fmt.Sprintf("%s.driver.HiveExternalCatalog.partitionsFetched", appID)]; ok {
+	if stat, ok := clusterStats.Counters[appID+".driver.HiveExternalCatalog.partitionsFetched"]; ok {
 		s.mb.RecordSparkDriverHiveExternalCatalogPartitionsFetchedDataPoint(now, stat.Count)
 	}
 
-	if stat, ok := clusterStats.Histograms[fmt.Sprintf("%s.driver.CodeGenerator.compilationTime", appID)]; ok {
+	if stat, ok := clusterStats.Histograms[appID+".driver.CodeGenerator.compilationTime"]; ok {
 		s.mb.RecordSparkDriverCodeGeneratorCompilationCountDataPoint(now, stat.Count)
 		s.mb.RecordSparkDriverCodeGeneratorCompilationAverageTimeDataPoint(now, stat.Mean)
 	}
-	if stat, ok := clusterStats.Histograms[fmt.Sprintf("%s.driver.CodeGenerator.generatedClassSize", appID)]; ok {
+	if stat, ok := clusterStats.Histograms[appID+".driver.CodeGenerator.generatedClassSize"]; ok {
 		s.mb.RecordSparkDriverCodeGeneratorGeneratedClassCountDataPoint(now, stat.Count)
 		s.mb.RecordSparkDriverCodeGeneratorGeneratedClassAverageSizeDataPoint(now, stat.Mean)
 	}
-	if stat, ok := clusterStats.Histograms[fmt.Sprintf("%s.driver.CodeGenerator.generatedMethodSize", appID)]; ok {
+	if stat, ok := clusterStats.Histograms[appID+".driver.CodeGenerator.generatedMethodSize"]; ok {
 		s.mb.RecordSparkDriverCodeGeneratorGeneratedMethodCountDataPoint(now, stat.Count)
 		s.mb.RecordSparkDriverCodeGeneratorGeneratedMethodAverageSizeDataPoint(now, stat.Mean)
 	}
-	if stat, ok := clusterStats.Histograms[fmt.Sprintf("%s.driver.CodeGenerator.sourceCodeSize", appID)]; ok {
+	if stat, ok := clusterStats.Histograms[appID+".driver.CodeGenerator.sourceCodeSize"]; ok {
 		s.mb.RecordSparkDriverCodeGeneratorSourceCodeOperationsDataPoint(now, stat.Count)
 		s.mb.RecordSparkDriverCodeGeneratorSourceCodeAverageSizeDataPoint(now, stat.Mean)
 	}
 
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.DAGScheduler.job.activeJobs", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.DAGScheduler.job.activeJobs"]; ok {
 		s.mb.RecordSparkDriverDagSchedulerJobActiveDataPoint(now, int64(stat.Value))
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.DAGScheduler.job.allJobs", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.DAGScheduler.job.allJobs"]; ok {
 		s.mb.RecordSparkDriverDagSchedulerJobCountDataPoint(now, int64(stat.Value))
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.DAGScheduler.stage.failedStages", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.DAGScheduler.stage.failedStages"]; ok {
 		s.mb.RecordSparkDriverDagSchedulerStageFailedDataPoint(now, int64(stat.Value))
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.DAGScheduler.stage.runningStages", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.DAGScheduler.stage.runningStages"]; ok {
 		s.mb.RecordSparkDriverDagSchedulerStageCountDataPoint(now, int64(stat.Value), metadata.AttributeSchedulerStatusRunning)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.DAGScheduler.stage.waitingStages", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.DAGScheduler.stage.waitingStages"]; ok {
 		s.mb.RecordSparkDriverDagSchedulerStageCountDataPoint(now, int64(stat.Value), metadata.AttributeSchedulerStatusWaiting)
 	}
 
-	if stat, ok := clusterStats.Counters[fmt.Sprintf("%s.driver.LiveListenerBus.numEventsPosted", appID)]; ok {
+	if stat, ok := clusterStats.Counters[appID+".driver.LiveListenerBus.numEventsPosted"]; ok {
 		s.mb.RecordSparkDriverLiveListenerBusPostedDataPoint(now, stat.Count)
 	}
-	if stat, ok := clusterStats.Timers[fmt.Sprintf("%s.driver.LiveListenerBus.queue.appStatus.listenerProcessingTime", appID)]; ok {
+	if stat, ok := clusterStats.Timers[appID+".driver.LiveListenerBus.queue.appStatus.listenerProcessingTime"]; ok {
 		s.mb.RecordSparkDriverLiveListenerBusProcessingTimeAverageDataPoint(now, stat.Mean)
 	}
-	if stat, ok := clusterStats.Counters[fmt.Sprintf("%s.driver.LiveListenerBus.queue.appStatus.numDroppedEvents", appID)]; ok {
+	if stat, ok := clusterStats.Counters[appID+".driver.LiveListenerBus.queue.appStatus.numDroppedEvents"]; ok {
 		s.mb.RecordSparkDriverLiveListenerBusDroppedDataPoint(now, stat.Count)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.LiveListenerBus.queue.appStatus.size", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.LiveListenerBus.queue.appStatus.size"]; ok {
 		s.mb.RecordSparkDriverLiveListenerBusQueueSizeDataPoint(now, int64(stat.Value))
 	}
 
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.JVMCPU.jvmCpuTime", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.JVMCPU.jvmCpuTime"]; ok {
 		s.mb.RecordSparkDriverJvmCPUTimeDataPoint(now, int64(stat.Value))
 	}
 
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.JVMOffHeapMemory", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.JVMOffHeapMemory"]; ok {
 		s.mb.RecordSparkDriverExecutorMemoryJvmDataPoint(now, int64(stat.Value), metadata.AttributeLocationOffHeap)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.JVMHeapMemory", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.JVMHeapMemory"]; ok {
 		s.mb.RecordSparkDriverExecutorMemoryJvmDataPoint(now, int64(stat.Value), metadata.AttributeLocationOnHeap)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.OffHeapExecutionMemory", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.OffHeapExecutionMemory"]; ok {
 		s.mb.RecordSparkDriverExecutorMemoryExecutionDataPoint(now, int64(stat.Value), metadata.AttributeLocationOffHeap)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.OnHeapExecutionMemory", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.OnHeapExecutionMemory"]; ok {
 		s.mb.RecordSparkDriverExecutorMemoryExecutionDataPoint(now, int64(stat.Value), metadata.AttributeLocationOnHeap)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.OffHeapStorageMemory", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.OffHeapStorageMemory"]; ok {
 		s.mb.RecordSparkDriverExecutorMemoryStorageDataPoint(now, int64(stat.Value), metadata.AttributeLocationOffHeap)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.OnHeapStorageMemory", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.OnHeapStorageMemory"]; ok {
 		s.mb.RecordSparkDriverExecutorMemoryStorageDataPoint(now, int64(stat.Value), metadata.AttributeLocationOnHeap)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.DirectPoolMemory", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.DirectPoolMemory"]; ok {
 		s.mb.RecordSparkDriverExecutorMemoryPoolDataPoint(now, int64(stat.Value), metadata.AttributePoolMemoryTypeDirect)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.MappedPoolMemory", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.MappedPoolMemory"]; ok {
 		s.mb.RecordSparkDriverExecutorMemoryPoolDataPoint(now, int64(stat.Value), metadata.AttributePoolMemoryTypeMapped)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.MinorGCCount", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.MinorGCCount"]; ok {
 		s.mb.RecordSparkDriverExecutorGcOperationsDataPoint(now, int64(stat.Value), metadata.AttributeGcTypeMinor)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.MajorGCCount", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.MajorGCCount"]; ok {
 		s.mb.RecordSparkDriverExecutorGcOperationsDataPoint(now, int64(stat.Value), metadata.AttributeGcTypeMajor)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.MinorGCTime", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.MinorGCTime"]; ok {
 		s.mb.RecordSparkDriverExecutorGcTimeDataPoint(now, int64(stat.Value), metadata.AttributeGcTypeMinor)
 	}
-	if stat, ok := clusterStats.Gauges[fmt.Sprintf("%s.driver.ExecutorMetrics.MajorGCTime", appID)]; ok {
+	if stat, ok := clusterStats.Gauges[appID+".driver.ExecutorMetrics.MajorGCTime"]; ok {
 		s.mb.RecordSparkDriverExecutorGcTimeDataPoint(now, int64(stat.Value), metadata.AttributeGcTypeMajor)
 	}
 

receiver/awscontainerinsightreceiver/internal/cadvisor/extractors/extractor.go

@@ -164,10 +164,10 @@ func getMetricKey(metric *CAdvisorMetric) string {
 	switch metricType {
 	case ci.TypeInstance:
 		// merge cpu, memory, net metric for type Instance
-		metricKey = fmt.Sprintf("metricType:%s", ci.TypeInstance)
+		metricKey = "metricType:" + ci.TypeInstance
 	case ci.TypeNode:
 		// merge cpu, memory, net metric for type Node
-		metricKey = fmt.Sprintf("metricType:%s", ci.TypeNode)
+		metricKey = "metricType:" + ci.TypeNode
 	case ci.TypePod:
 		// merge cpu, memory, net metric for type Pod
 		metricKey = fmt.Sprintf("metricType:%s,podId:%s", ci.TypePod, metric.GetTags()[ci.PodIDKey])

receiver/awscontainerinsightreceiver/internal/ecsInfo/cgroup.go

@@ -6,6 +6,7 @@ package ecsinfo // import "github.com/open-telemetry/opentelemetry-collector-con
 import (
 	"bufio"
 	"context"
+	"errors"
 	"fmt"
 	"log"
 	"math"
@@ -227,7 +228,7 @@ func getCGroupMountPoint(mountConfigPath string) (string, error) {
 			return filepath.Dir(fields[4]), nil
 		}
 	}
-	return "", fmt.Errorf("mount point not existed")
+	return "", errors.New("mount point not existed")
 }
 
 func getCGroupPathForTask(cgroupMount, controller, taskID, clusterName string) (string, error) {

receiver/awscontainerinsightreceiver/internal/k8sapiserver/k8sapiserver.go

@@ -260,7 +260,7 @@ func (k *K8sAPIServer) startLeaderElection(ctx context.Context, lock resourceloc
 			RetryPeriod:   5 * time.Second,
 			Callbacks: leaderelection.LeaderCallbacks{
 				OnStartedLeading: func(ctx context.Context) {
-					k.logger.Info(fmt.Sprintf("k8sapiserver OnStartedLeading: %s", k.nodeName))
+					k.logger.Info("k8sapiserver OnStartedLeading: " + k.nodeName)
 					// we're notified when we start
 					k.mu.Lock()
 					k.leading = true
@@ -292,7 +292,7 @@ func (k *K8sAPIServer) startLeaderElection(ctx context.Context, lock resourceloc
 					}
 				},
 				OnStoppedLeading: func() {
-					k.logger.Info(fmt.Sprintf("k8sapiserver OnStoppedLeading: %s", k.nodeName))
+					k.logger.Info("k8sapiserver OnStoppedLeading: " + k.nodeName)
 					// we can do cleanup here, or after the RunOrDie method returns
 					k.mu.Lock()
 					defer k.mu.Unlock()
@@ -302,14 +302,14 @@ func (k *K8sAPIServer) startLeaderElection(ctx context.Context, lock resourceloc
 					k.k8sClient.ShutdownPodClient()
 				},
 				OnNewLeader: func(identity string) {
-					k.logger.Info(fmt.Sprintf("k8sapiserver Switch New Leader: %s", identity))
+					k.logger.Info("k8sapiserver Switch New Leader: " + identity)
 				},
 			},
 		})
 
 		select {
 		case <-ctx.Done(): // when leader election ends, the channel ctx.Done() will be closed
-			k.logger.Info(fmt.Sprintf("k8sapiserver shutdown Leader Election: %s", k.nodeName))
+			k.logger.Info("k8sapiserver shutdown Leader Election: " + k.nodeName)
 			return
 		default:
 		}

receiver/awscontainerinsightreceiver/internal/stores/podstore.go

@@ -217,7 +217,7 @@ func (p *PodStore) Decorate(ctx context.Context, metric CIMetric, kubernetesBlob
 			p.addPodOwnersAndPodName(metric, &entry.pod, kubernetesBlob)
 			addLabels(&entry.pod, kubernetesBlob)
 		} else {
-			p.logger.Warn(fmt.Sprintf("no pod information is found in podstore for pod %s", podKey))
+			p.logger.Warn("no pod information is found in podstore for pod " + podKey)
 			return false
 		}
 	}
@@ -262,7 +262,7 @@ func (p *PodStore) refreshInternal(now time.Time, podList []corev1.Pod) {
 		pod := podList[i]
 		podKey := createPodKeyFromMetaData(&pod)
 		if podKey == "" {
-			p.logger.Warn(fmt.Sprintf("podKey is unavailable, refresh pod store for pod %s", pod.Name))
+			p.logger.Warn("podKey is unavailable, refresh pod store for pod " + pod.Name)
 			continue
 		}
 		if pod.Status.Phase != corev1.PodSucceeded && pod.Status.Phase != corev1.PodFailed {

receiver/awsecscontainermetricsreceiver/internal/awsecscontainermetrics/stats_provider_test.go

@@ -4,7 +4,7 @@
 package awsecscontainermetrics
 
 import (
-	"fmt"
+	"errors"
 	"os"
 	"testing"
 
@@ -28,7 +28,7 @@ func (f testRestClient) GetResponse(path string) ([]byte, error) {
 	}
 
 	if f.fail {
-		return []byte{}, fmt.Errorf("failed")
+		return []byte{}, errors.New("failed")
 	}
 	if f.invalidJSON {
 		return []byte("wrong-json-body"), nil

receiver/awsecscontainermetricsreceiver/receiver_test.go

@@ -6,7 +6,6 @@ package awsecscontainermetricsreceiver
 import (
 	"context"
 	"errors"
-	"fmt"
 	"os"
 	"testing"
 
@@ -96,7 +95,7 @@ type invalidFakeClient struct {
 }
 
 func (f invalidFakeClient) GetResponse(_ string) ([]byte, error) {
-	return nil, fmt.Errorf("intentional error")
+	return nil, errors.New("intentional error")
 }
 
 func TestCollectDataFromEndpointWithEndpointError(t *testing.T) {

receiver/awsfirehosereceiver/config_test.go

@@ -4,7 +4,6 @@
 package awsfirehosereceiver
 
 import (
-	"fmt"
 	"path/filepath"
 	"testing"
 
@@ -23,7 +22,7 @@ func TestLoadConfig(t *testing.T) {
 		"cwmetrics", "cwlogs", "otlp_v1", "invalid",
 	} {
 		t.Run(configType, func(t *testing.T) {
-			fileName := fmt.Sprintf("%s_config.yaml", configType)
+			fileName := configType + "_config.yaml"
 			cm, err := confmaptest.LoadConf(filepath.Join("testdata", fileName))
 			require.NoError(t, err)
 

receiver/awsfirehosereceiver/internal/unmarshaler/unmarshalertest/nop_logs_unmarshaler_test.go

@@ -4,7 +4,7 @@
 package unmarshalertest
 
 import (
-	"fmt"
+	"errors"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -31,7 +31,7 @@ func TestNewWithLogs(t *testing.T) {
 }
 
 func TestNewErrLogs(t *testing.T) {
-	wantErr := fmt.Errorf("test error")
+	wantErr := errors.New("test error")
 	unmarshaler := NewErrLogs(wantErr)
 	got, err := unmarshaler.Unmarshal(nil)
 	require.Error(t, err)

receiver/awsfirehosereceiver/internal/unmarshaler/unmarshalertest/nop_metrics_unmarshaler_test.go

@@ -4,7 +4,7 @@
 package unmarshalertest
 
 import (
-	"fmt"
+	"errors"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -31,7 +31,7 @@ func TestNewWithMetrics(t *testing.T) {
 }
 
 func TestNewErrMetrics(t *testing.T) {
-	wantErr := fmt.Errorf("test error")
+	wantErr := errors.New("test error")
 	unmarshaler := NewErrMetrics(wantErr)
 	got, err := unmarshaler.Unmarshal(nil)
 	require.Error(t, err)

receiver/awsfirehosereceiver/receiver.go

@@ -12,6 +12,7 @@ import (
 	"io"
 	"net"
 	"net/http"
+	"strconv"
 	"sync"
 	"time"
 
@@ -282,7 +283,7 @@ func (fmr *firehoseReceiver) sendResponse(w http.ResponseWriter, requestID strin
 	}
 	payload, _ := json.Marshal(body)
 	w.Header().Set(headerContentType, "application/json")
-	w.Header().Set(headerContentLength, fmt.Sprintf("%d", len(payload)))
+	w.Header().Set(headerContentLength, strconv.Itoa(len(payload)))
 	w.WriteHeader(statusCode)
 	if _, err = w.Write(payload); err != nil {
 		fmr.settings.Logger.Error("Failed to send response", zap.Error(err))

receiver/awsfirehosereceiver/receiver_test.go

@@ -13,6 +13,7 @@ import (
 	"net"
 	"net/http"
 	"net/http/httptest"
+	"strconv"
 	"testing"
 	"time"
 
@@ -190,7 +191,7 @@ func TestFirehoseRequest(t *testing.T) {
 
 			request := httptest.NewRequest(http.MethodPost, "/", requestBody)
 			request.Header.Set(headerContentType, "application/json")
-			request.Header.Set(headerContentLength, fmt.Sprintf("%d", requestBody.Len()))
+			request.Header.Set(headerContentLength, strconv.Itoa(requestBody.Len()))
 			request.Header.Set(headerFirehoseRequestID, testFirehoseRequestID)
 			request.Header.Set(headerFirehoseAccessKey, testFirehoseAccessKey)
 			if testCase.headers != nil {