1

server/common/training_runner.go

@@ -309,7 +309,7 @@ func (r *sshRunner) IsAlive(ctx context.Context, job *TrainingJob) (bool, error)
 	}
 	out, err := r.runCmd(ctx, job, fmt.Sprintf("kill -0 %d 2>/dev/null && echo alive || echo dead", pid))
 	if err != nil {
-		return false, nil // 连接故障按"状态未知"处理，不误判任务结束
+		return false, err // 连接故障 = 状态未知，交上层处理，不吞错
 	}
 	return strings.TrimSpace(out) == "alive", nil
 }
@@ -330,9 +330,15 @@ func (r *sshRunner) FetchLogTail(ctx context.Context, job *TrainingJob) (string,
 }
 
 func (r *sshRunner) FetchResult(ctx context.Context, job *TrainingJob) (string, error) {
-	out, err := r.runCmd(ctx, job, fmt.Sprintf("cat %s/results/%d.json 2>/dev/null", job.Workdir, job.TaskId))
-	if err != nil || out == "" {
-		return "", nil // 文件不存在 = 仍在跑
+	// if -f 区分「结果文件未就绪」（("", nil)）与 SSH 连接/命令真实失败（("", err)）：
+	// 原 cat 2>/dev/null 两者混为一谈，连接故障会被当成"文件不存在=仍在跑"而吞掉错误
+	path := filepath.Join(job.Workdir, "results", fmt.Sprintf("%d.json", job.TaskId))
+	out, err := r.runCmd(ctx, job, fmt.Sprintf("if [ -f %s ]; then cat %s; else echo __NO_RESULT__; fi", path, path))
+	if err != nil {
+		return "", err
+	}
+	if strings.TrimSpace(out) == "__NO_RESULT__" {
+		return "", nil
 	}
 	return out, nil
 }