Merge pull request #4737 from ch33hau/4283-hh-throws-error-even-if-disabled

Disable HintedHandoff if configuration is not set. #4283

CHANGELOG.md

@@ -111,6 +111,7 @@
 - [#4602](https://github.com/influxdb/influxdb/issues/4602): Fixes data race between PointsWriter and Subscriber services.
 - [#4691](https://github.com/influxdb/influxdb/issues/4691): Enable toml test `TestConfig_Encode`.
 - [#4684](https://github.com/influxdb/influxdb/pull/4684): Add Graphite and UDP section to default config. Thanks @nkatsaros
+- [#4283](https://github.com/influxdb/influxdb/pull/4283): Disable HintedHandoff if configuration is not set.
 
 ## v0.9.4 [2015-09-14]
 

cmd/influxd/run/config.go

@@ -101,6 +101,7 @@ func NewDemoConfig() (*Config, error) {
 	c.HintedHandoff.Dir = filepath.Join(homeDir, ".influxdb/hh")
 	c.Data.WALDir = filepath.Join(homeDir, ".influxdb/wal")
 
+	c.HintedHandoff.Enabled = true
 	c.Admin.Enabled = true
 
 	return c, nil
@@ -110,7 +111,7 @@ func NewDemoConfig() (*Config, error) {
 func (c *Config) Validate() error {
 	if c.Meta.Dir == "" {
 		return errors.New("Meta.Dir must be specified")
-	} else if c.HintedHandoff.Dir == "" {
+	} else if c.HintedHandoff.Enabled && c.HintedHandoff.Dir == "" {
 		return errors.New("HintedHandoff.Dir must be specified")
 	}
 

services/hh/config.go

@@ -47,7 +47,7 @@ type Config struct {
 
 func NewConfig() Config {
 	return Config{
-		Enabled:          true,
+		Enabled:          false,
 		MaxSize:          DefaultMaxSize,
 		MaxAge:           toml.Duration(DefaultMaxAge),
 		RetryRateLimit:   DefaultRetryRateLimit,

services/hh/config_test.go

@@ -53,3 +53,21 @@ purge-interval = "1h"
 	}
 
 }
+
+func TestDefaultDisabled(t *testing.T) {
+	// Parse empty configuration.
+	var c hh.Config
+	if _, err := toml.Decode(``, &c); err != nil {
+		t.Fatal(err)
+	}
+
+	if exp := false; c.Enabled == true {
+		t.Fatalf("unexpected default Enabled value: got %v, exp %v", c.Enabled, exp)
+	}
+
+	// Default configuration.
+	c = hh.NewConfig()
+	if exp := false; c.Enabled == true {
+		t.Fatalf("unexpected default enabled value: got %v, exp %v", c.Enabled, exp)
+	}
+}