[pkg/ottl] Remove tracing from OTTL (open-telemetry#34910)

**Description:** 
Reverts
open-telemetry#33508
since it was causing performance issues

**Link to tracking Issue:** <Issue number if applicable>
Reopens
open-telemetry#33433
Related to
open-telemetry/opentelemetry-collector#10858
Closes
open-telemetry#34890

.chloggen/ottl-remove-tracing.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: ottl
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Remove tracing from OTTL due to performance concerns
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [34910]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

pkg/ottl/README.md

@@ -151,21 +151,3 @@ service:
 2024-05-29T16:38:09.600-0600    debug   [email protected]/parser.go:268     TransformContext after statement execution      {"kind": "processor", "name": "transform", "pipeline": "logs", "statement": "set(instrumentation_scope.attributes[\"test\"], [\"pass\"])", "condition matched": true, "TransformContext": {"resource": {"attributes": {"test": "pass"}, "dropped_attribute_count": 0}, "scope": {"attributes": {"test": ["pass"]}, "dropped_attribute_count": 0, "name": "", "version": ""}, "log_record": {"attributes": {"log.file.name": "test.log"}, "body": "test", "dropped_attribute_count": 0, "flags": 0, "observed_time_unix_nano": 1717022289500721000, "severity_number": 0, "severity_text": "", "span_id": "", "time_unix_nano": 0, "trace_id": ""}, "cache": {}}}
 2024-05-29T16:38:09.601-0600    debug   [email protected]/parser.go:268     TransformContext after statement execution      {"kind": "processor", "name": "transform", "pipeline": "logs", "statement": "set(attributes[\"test\"], true)", "condition matched": true, "TransformContext": {"resource": {"attributes": {"test": "pass"}, "dropped_attribute_count": 0}, "scope": {"attributes": {"test": ["pass"]}, "dropped_attribute_count": 0, "name": "", "version": ""}, "log_record": {"attributes": {"log.file.name": "test.log", "test": true}, "body": "test", "dropped_attribute_count": 0, "flags": 0, "observed_time_unix_nano": 1717022289500721000, "severity_number": 0, "severity_text": "", "span_id": "", "time_unix_nano": 0, "trace_id": ""}, "cache": {}}}
 ```
-
-If configured to do so, the collector also emits traces for the execution of OTTL statement sequences.
-These traces contain spans for the execution of each statement, including the statement itself and whether it has
-been applied or not. To make use of this, enable the self monitoring of the collector by setting the
-`--feature-gates=telemetry.useOtelWithSDKConfigurationForInternalTelemetry` flag, and using the following configuration
-to export the traces to e.g. an OTLP API endpoint:
-
-```yaml
-service:
-  telemetry:
-    traces:
-      processors:
-        - batch:
-            exporter:
-              otlp:
-                protocol: http/protobuf
-                endpoint: ${env:OTLP_ENDPOINT}/v1/traces
-```

pkg/ottl/go.mod

@@ -16,8 +16,6 @@ require (
 	go.opentelemetry.io/collector/component v0.108.1
 	go.opentelemetry.io/collector/pdata v1.14.1
 	go.opentelemetry.io/collector/semconv v0.108.1
-	go.opentelemetry.io/otel v1.29.0
-	go.opentelemetry.io/otel/sdk v1.29.0
 	go.opentelemetry.io/otel/trace v1.29.0
 	go.uber.org/goleak v1.3.0
 	go.uber.org/zap v1.27.0
@@ -45,11 +43,13 @@ require (
 	github.com/prometheus/common v0.55.0 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
 	go.opentelemetry.io/collector/config/configtelemetry v0.108.1 // indirect
+	go.opentelemetry.io/otel v1.29.0 // indirect
 	go.opentelemetry.io/otel/exporters/prometheus v0.50.0 // indirect
 	go.opentelemetry.io/otel/metric v1.29.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.28.0 // indirect
 	go.opentelemetry.io/otel/sdk/metric v1.28.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/sys v0.23.0 // indirect
 	golang.org/x/text v0.17.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094 // indirect
 	google.golang.org/grpc v1.65.0 // indirect

pkg/ottl/parser.go

@@ -10,18 +10,9 @@ import (
 
 	"github.com/alecthomas/participle/v2"
 	"go.opentelemetry.io/collector/component"
-	"go.opentelemetry.io/otel/attribute"
-	"go.opentelemetry.io/otel/codes"
-	"go.opentelemetry.io/otel/trace"
-	"go.opentelemetry.io/otel/trace/noop"
 	"go.uber.org/zap"
 )
 
-const (
-	logAttributeTraceID = "trace_id"
-	logAttributeSpanID  = "span_id"
-)
-
 // Statement holds a top level Statement for processing telemetry data. A Statement is a combination of a function
 // invocation and the boolean expression to match telemetry for invoking the function.
 type Statement[K any] struct {
@@ -240,7 +231,6 @@ type StatementSequence[K any] struct {
 	statements        []*Statement[K]
 	errorMode         ErrorMode
 	telemetrySettings component.TelemetrySettings
-	tracer            trace.Tracer
 }
 
 type StatementSequenceOption[K any] func(*StatementSequence[K])
@@ -260,10 +250,6 @@ func NewStatementSequence[K any](statements []*Statement[K], telemetrySettings c
 		statements:        statements,
 		errorMode:         PropagateError,
 		telemetrySettings: telemetrySettings,
-		tracer:            &noop.Tracer{},
-	}
-	if telemetrySettings.TracerProvider != nil {
-		s.tracer = telemetrySettings.TracerProvider.Tracer("ottl")
 	}
 	for _, op := range options {
 		op(&s)
@@ -276,62 +262,20 @@ func NewStatementSequence[K any](statements []*Statement[K], telemetrySettings c
 // When the ErrorMode of the StatementSequence is `ignore`, errors are logged and execution continues to the next statement.
 // When the ErrorMode of the StatementSequence is `silent`, errors are not logged and execution continues to the next statement.
 func (s *StatementSequence[K]) Execute(ctx context.Context, tCtx K) error {
-	ctx, sequenceSpan := s.tracer.Start(ctx, "ottl/StatementSequenceExecution")
-	defer sequenceSpan.End()
-	s.telemetrySettings.Logger.Debug(
-		"initial TransformContext",
-		zap.Any("TransformContext", tCtx),
-		zap.String(logAttributeTraceID, sequenceSpan.SpanContext().TraceID().String()),
-		zap.String(logAttributeSpanID, sequenceSpan.SpanContext().SpanID().String()),
-	)
+	s.telemetrySettings.Logger.Debug("initial TransformContext", zap.Any("TransformContext", tCtx))
 	for _, statement := range s.statements {
-		statementCtx, statementSpan := s.tracer.Start(ctx, "ottl/StatementExecution")
-		statementSpan.SetAttributes(
-			attribute.KeyValue{
-				Key:   "statement",
-				Value: attribute.StringValue(statement.origText),
-			},
-		)
-		_, condition, err := statement.Execute(statementCtx, tCtx)
-		statementSpan.SetAttributes(
-			attribute.KeyValue{
-				Key:   "condition.matched",
-				Value: attribute.BoolValue(condition),
-			},
-		)
-		s.telemetrySettings.Logger.Debug(
-			"TransformContext after statement execution",
-			zap.String("statement", statement.origText),
-			zap.Bool("condition matched", condition),
-			zap.Any("TransformContext", tCtx),
-			zap.String(logAttributeTraceID, statementSpan.SpanContext().TraceID().String()),
-			zap.String(logAttributeSpanID, statementSpan.SpanContext().SpanID().String()),
-		)
+		_, condition, err := statement.Execute(ctx, tCtx)
+		s.telemetrySettings.Logger.Debug("TransformContext after statement execution", zap.String("statement", statement.origText), zap.Bool("condition matched", condition), zap.Any("TransformContext", tCtx))
 		if err != nil {
-			statementSpan.RecordError(err)
-			errMsg := fmt.Sprintf("failed to execute statement '%s': %v", statement.origText, err)
-			statementSpan.SetStatus(codes.Error, errMsg)
 			if s.errorMode == PropagateError {
-				sequenceSpan.SetStatus(codes.Error, errMsg)
-				statementSpan.End()
 				err = fmt.Errorf("failed to execute statement: %v, %w", statement.origText, err)
 				return err
 			}
 			if s.errorMode == IgnoreError {
-				s.telemetrySettings.Logger.Warn(
-					"failed to execute statement",
-					zap.Error(err),
-					zap.String("statement", statement.origText),
-					zap.String(logAttributeTraceID, statementSpan.SpanContext().TraceID().String()),
-					zap.String(logAttributeSpanID, statementSpan.SpanContext().SpanID().String()),
-				)
+				s.telemetrySettings.Logger.Warn("failed to execute statement", zap.Error(err), zap.String("statement", statement.origText))
 			}
-		} else {
-			statementSpan.SetStatus(codes.Ok, "statement executed successfully")
 		}
-		statementSpan.End()
 	}
-	sequenceSpan.SetStatus(codes.Ok, "statement sequence executed successfully")
 	return nil
 }