Merge pull request #45 from github/znull/rss-process-missing

ignore errProcessInfoMissing when getting process RSS

Author: znull

internal/ptree/ptree.go

@@ -24,6 +24,10 @@ var (
 func GetProcessRSSAnon(pid int) (uint64, error) {
 	status := fmt.Sprintf("%d/status", pid)
 	f, err := procfs.Open(status)
+	if os.IsNotExist(err) {
+		// process is already gone
+		return 0, nil
+	}
 	if err != nil {
 		return 0, err
 	}

pipe/memorylimit.go

@@ -58,7 +58,7 @@ func killAtLimit(byteLimit uint64, eventHandler func(e *Event)) memoryWatchFunc
 				return
 			case <-t.C:
 				rss, err := stage.GetRSSAnon(ctx)
-				if err != nil {
+				if err != nil && !errors.Is(err, errProcessInfoMissing) {
 					consecutiveErrors++
 					if consecutiveErrors >= 2 {
 						eventHandler(&Event{