clean up old tickers

cmd/gonic/gonic.go

@@ -293,19 +293,23 @@ func main() {
 		defer logJob("session clean")()
 
 		ticker := time.NewTicker(10 * time.Minute)
+		defer ticker.Stop()
+		for {
 			select {
 			case <-ctx.Done():
 				return nil
 			case <-ticker.C:
 				sessDB.Cleanup()
 			}
-		return nil
+		}
 	})
 
 	errgrp.Go(func() error {
 		defer logJob("podcast refresh")()
 
 		ticker := time.NewTicker(time.Hour)
+		defer ticker.Stop()
+		for {
 			select {
 			case <-ctx.Done():
 				return nil
@@ -314,7 +318,7 @@ func main() {
 					log.Printf("failed to refresh some feeds: %s", err)
 				}
 			}
-		return nil
+		}
 	})
 
 	errgrp.Go(func() error {
@@ -325,6 +329,8 @@ func main() {
 		defer logJob("podcast purge")()
 
 		ticker := time.NewTicker(24 * time.Hour)
+		defer ticker.Stop()
+		for {
 			select {
 			case <-ctx.Done():
 				return nil
@@ -333,7 +339,7 @@ func main() {
 					log.Printf("error purging old podcasts: %v", err)
 				}
 			}
-		return nil
+		}
 	})
 
 	errgrp.Go(func() error {
@@ -344,6 +350,8 @@ func main() {
 		defer logJob("scan timer")()
 
 		ticker := time.NewTicker(time.Duration(*confScanIntervalMins) * time.Minute)
+		defer ticker.Stop()
+		for {
 			select {
 			case <-ctx.Done():
 				return nil
@@ -352,7 +360,7 @@ func main() {
 					log.Printf("error scanning: %v", err)
 				}
 			}
-		return nil
+		}
 	})
 
 	errgrp.Go(func() error {
@@ -412,14 +420,17 @@ func main() {
 		defer logJob("refresh artist info")()
 
 		ticker := time.NewTicker(8 * time.Second)
+		defer ticker.Stop()
+		for {
 			select {
 			case <-ctx.Done():
+				return nil
 			case <-ticker.C:
 				if err := artistInfoCache.Refresh(); err != nil {
 					log.Printf("error in artist info cache: %v", err)
 				}
 			}
-		return nil
+		}
 	})
 
 	errgrp.Go(func() error {