fix: avoid logging no such process errors for process priority (#14655)

sreya · web-flow · commit 9f4972901c51 · 2024-09-12T18:00:42.000Z
diff --git a/agent/agent.go b/agent/agent.go
@@ -1677,11 +1677,14 @@ func (a *agent) manageProcessPriority(ctx context.Context, debouncer *logDebounc
 
 		score, niceErr := proc.Niceness(a.syscaller)
 		if niceErr != nil && !xerrors.Is(niceErr, os.ErrPermission) {
-			debouncer.Warn(ctx, "unable to get proc niceness",
-				slog.F("cmd", proc.Cmd()),
-				slog.F("pid", proc.PID),
-				slog.Error(niceErr),
-			)
+			if !isNoSuchProcessErr(niceErr) {
+				debouncer.Warn(ctx, "unable to get proc niceness",
+					slog.F("cmd", proc.Cmd()),
+					slog.F("pid", proc.PID),
+					slog.Error(niceErr),
+				)
+			}
+
 			continue
 		}
 
@@ -1697,12 +1700,14 @@ func (a *agent) manageProcessPriority(ctx context.Context, debouncer *logDebounc
 		if niceErr == nil {
 			err := proc.SetNiceness(a.syscaller, niceness)
 			if err != nil && !xerrors.Is(err, os.ErrPermission) {
-				debouncer.Warn(ctx, "unable to set proc niceness",
-					slog.F("cmd", proc.Cmd()),
-					slog.F("pid", proc.PID),
-					slog.F("niceness", niceness),
-					slog.Error(err),
-				)
+				if !isNoSuchProcessErr(err) {
+					debouncer.Warn(ctx, "unable to set proc niceness",
+						slog.F("cmd", proc.Cmd()),
+						slog.F("pid", proc.PID),
+						slog.F("niceness", niceness),
+						slog.Error(err),
+					)
+				}
 			}
 		}
 
@@ -1711,12 +1716,14 @@ func (a *agent) manageProcessPriority(ctx context.Context, debouncer *logDebounc
 			oomScoreStr := strconv.Itoa(oomScore)
 			err := afero.WriteFile(a.filesystem, fmt.Sprintf("/proc/%d/oom_score_adj", proc.PID), []byte(oomScoreStr), 0o644)
 			if err != nil && !xerrors.Is(err, os.ErrPermission) {
-				debouncer.Warn(ctx, "unable to set oom_score_adj",
-					slog.F("cmd", proc.Cmd()),
-					slog.F("pid", proc.PID),
-					slog.F("score", oomScoreStr),
-					slog.Error(err),
-				)
+				if !isNoSuchProcessErr(err) {
+					debouncer.Warn(ctx, "unable to set oom_score_adj",
+						slog.F("cmd", proc.Cmd()),
+						slog.F("pid", proc.PID),
+						slog.F("score", oomScoreStr),
+						slog.Error(err),
+					)
+				}
 			}
 		}
 		modProcs = append(modProcs, proc)
@@ -2146,3 +2153,7 @@ func (l *logDebouncer) log(ctx context.Context, level slog.Level, msg string, fi
 	}
 	l.messages[msg] = time.Now()
 }
+
+func isNoSuchProcessErr(err error) bool {
+	return err != nil && strings.Contains(err.Error(), "no such process")
+}
