[pkg/stanza] Do not log entries on error

.chloggen/pkg-stanza-optional-log-entry.yaml

@@ -0,0 +1,30 @@
+# 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: pkg/stanza
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Entries are no longer logged during error conditions.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [26670]
+
+# (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: |
+  This change is being made to ensure sensitive information contained in logs are never logged inadvertently.
+  This change is a breaking change because it may change user expectations. However, it should require
+  no action on the part of the user unless they are relying on logs from a few specific error cases.
+
+# 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/stanza/operator/helper/input.go

@@ -83,8 +83,8 @@ func (i *InputOperator) CanProcess() bool {
 }
 
 // Process will always return an error if called.
-func (i *InputOperator) Process(_ context.Context, entry *entry.Entry) error {
-	i.Errorw("Operator received an entry, but can not process", zap.Any("entry", entry))
+func (i *InputOperator) Process(_ context.Context, _ *entry.Entry) error {
+	i.Errorw("Operator received an entry, but can not process")
 	return errors.NewError(
 		"Operator can not process logs.",
 		"Ensure that operator is not configured to receive logs from other operators",

pkg/stanza/operator/helper/transformer.go

@@ -95,7 +95,7 @@ func (t *TransformerOperator) ProcessWith(ctx context.Context, entry *entry.Entr
 
 // HandleEntryError will handle an entry error using the on_error strategy.
 func (t *TransformerOperator) HandleEntryError(ctx context.Context, entry *entry.Entry, err error) error {
-	t.Errorw("Failed to process entry", zap.Any("error", err), zap.Any("action", t.OnError), zap.Any("entry", entry))
+	t.Errorw("Failed to process entry", zap.Any("error", err), zap.Any("action", t.OnError))
 	if t.OnError == SendOnError {
 		t.Write(ctx, entry)
 	}

pkg/stanza/operator/output/stdout/stdout.go

@@ -62,7 +62,7 @@ func (o *Output) Process(_ context.Context, entry *entry.Entry) error {
 	err := o.encoder.Encode(entry)
 	if err != nil {
 		o.mux.Unlock()
-		o.Errorf("Failed to process entry: %s, $s", err, entry.Body)
+		o.Errorf("Failed to process entry: %s", err)
 		return err
 	}
 	o.mux.Unlock()

pkg/stanza/operator/parser/jsonarray/json_array_parser.go

@@ -116,7 +116,7 @@ func generateParseToArrayFunc(pool *fastjson.ParserPool) parseFunc {
 				// Nested objects handled as a string since this parser doesn't support nested headers
 				parsedValues[i] = jArray[i].String()
 			default:
-				return nil, errors.New("failed to parse entry: " + string(jArray[i].MarshalTo(nil)))
+				return nil, errors.New("failed to parse entry")
 			}
 		}
 
@@ -159,7 +159,7 @@ func generateParseToMapFunc(pool *fastjson.ParserPool, header []string) parseFun
 				// Nested objects handled as a string since this parser doesn't support nested headers
 				parsedValues[header[i]] = jArray[i].String()
 			default:
-				return nil, errors.New("failed to parse entry: " + string(jArray[i].MarshalTo(nil)))
+				return nil, errors.New("failed to parse entry")
 			}
 		}