[connector/signaltometrics] Add feature gate to change default error_mode to ignore

.chloggen/signaltometrics-default-error-mode-ignore.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: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. receiver/filelog)
+component: connector/signaltometrics
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add `connector.signaltometrics.defaultErrorModeIgnore` feature gate to change default `error_mode` to `ignore`
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [48419]
+
+# (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: |
+  When the feature gate is enabled, the connector defaults to `ignore` mode which preserves
+  valid data when an OTTL condition or statement error occurs, improving resiliency. This is
+  a breaking change rolled out via feature gate to allow gradual adoption.
+
+# 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: [user]

connector/signaltometricsconnector/config/config.go

@@ -61,7 +61,8 @@ type Config struct {
 	// If an error occurs, the record is skipped and the error is logged.
 	// `silent` means the connector ignores errors returned by conditions and continues processing.
 	// If an error occurs, the record is skipped and the error is not logged.
-	// The default value is `propagate`.
+	// The default value is `propagate`, but when the `connector.signaltometrics.defaultErrorModeIgnore`
+	// feature gate is enabled, the default changes to `ignore`.
 	ErrorMode ottl.ErrorMode `mapstructure:"error_mode"`
 	// prevent unkeyed literal initialization
 	_ struct{}

connector/signaltometricsconnector/factory.go

@@ -24,6 +24,13 @@ import (
 	"github.com/open-telemetry/opentelemetry-collector-contrib/pkg/ottl/contexts/ottlspan"
 )
 
+func defaultErrorMode() ottl.ErrorMode {
+	if metadata.ConnectorSignaltometricsDefaultErrorModeIgnoreFeatureGate.IsEnabled() {
+		return ottl.IgnoreError
+	}
+	return ottl.PropagateError
+}
+
 // NewFactory returns a ConnectorFactory.
 func NewFactory() connector.Factory {
 	return xconnector.NewFactory(
@@ -39,7 +46,7 @@ func NewFactory() connector.Factory {
 
 func createDefaultConfig() component.Config {
 	return &config.Config{
-		ErrorMode: ottl.PropagateError,
+		ErrorMode: defaultErrorMode(),
 	}
 }
 

connector/signaltometricsconnector/metadata.yaml

@@ -17,6 +17,12 @@ status:
   codeowners:
     active: [ChrsMark, lahsivjar]
 
+feature_gates:
+  - id: connector.signaltometrics.defaultErrorModeIgnore
+    description: When enabled, the default error_mode is `ignore` instead of `propagate`.
+    stage: alpha
+    reference_url: https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/48419
+
 tests:
   config:
     spans: