Reverse Lookup order in stop job request

internal/api/api_test.go

@@ -488,3 +488,163 @@ func TestRestApi(t *testing.T) {
 		}
 	})
 }
+
+// TestStopJobWithReusedJobId verifies that stopping a recently started job works
+// even when an older job with the same jobId exists in the job table (e.g. with
+// state "failed"). This is a regression test for the bug where Find() on the job
+// table would match the old job instead of the new one still in job_cache.
+func TestStopJobWithReusedJobId(t *testing.T) {
+	restapi := setup(t)
+	t.Cleanup(cleanup)
+
+	testData := schema.JobData{
+		"load_one": map[schema.MetricScope]*schema.JobMetric{
+			schema.MetricScopeNode: {
+				Unit:     schema.Unit{Base: "load"},
+				Timestep: 60,
+				Series: []schema.Series{
+					{
+						Hostname:   "host123",
+						Statistics: schema.MetricStatistics{Min: 0.1, Avg: 0.2, Max: 0.3},
+						Data:       []schema.Float{0.1, 0.1, 0.1, 0.2, 0.2, 0.2, 0.3, 0.3, 0.3},
+					},
+				},
+			},
+		},
+	}
+
+	metricstore.TestLoadDataCallback = func(job *schema.Job, metrics []string, scopes []schema.MetricScope, ctx context.Context, resolution int) (schema.JobData, error) {
+		return testData, nil
+	}
+
+	r := chi.NewRouter()
+	restapi.MountAPIRoutes(r)
+
+	const contextUserKey repository.ContextKey = "user"
+	contextUserValue := &schema.User{
+		Username:   "testuser",
+		Projects:   make([]string, 0),
+		Roles:      []string{"user"},
+		AuthType:   0,
+		AuthSource: 2,
+	}
+
+	// Step 1: Start the first job (jobId=999)
+	const startJobBody1 string = `{
+		"jobId":            999,
+		"user":             "testuser",
+		"project":          "testproj",
+		"cluster":          "testcluster",
+		"partition":        "default",
+		"walltime":         3600,
+		"numNodes":         1,
+		"numHwthreads":     8,
+		"numAcc":           0,
+		"shared":           "none",
+		"monitoringStatus": 1,
+		"smt":              1,
+		"resources": [{"hostname": "host123", "hwthreads": [0, 1, 2, 3, 4, 5, 6, 7]}],
+		"startTime":        200000000
+	}`
+
+	if ok := t.Run("StartFirstJob", func(t *testing.T) {
+		req := httptest.NewRequest(http.MethodPost, "/jobs/start_job/", bytes.NewBuffer([]byte(startJobBody1)))
+		recorder := httptest.NewRecorder()
+		ctx := context.WithValue(req.Context(), contextUserKey, contextUserValue)
+		r.ServeHTTP(recorder, req.WithContext(ctx))
+		if recorder.Result().StatusCode != http.StatusCreated {
+			t.Fatal(recorder.Result().Status, recorder.Body.String())
+		}
+	}); !ok {
+		return
+	}
+
+	// Step 2: Sync to move job from cache to job table, then stop it as "failed"
+	time.Sleep(1 * time.Second)
+	restapi.JobRepository.SyncJobs()
+
+	const stopJobBody1 string = `{
+		"jobId":     999,
+		"startTime": 200000000,
+		"cluster":   "testcluster",
+		"jobState":  "failed",
+		"stopTime":  200001000
+	}`
+
+	if ok := t.Run("StopFirstJobAsFailed", func(t *testing.T) {
+		req := httptest.NewRequest(http.MethodPost, "/jobs/stop_job/", bytes.NewBuffer([]byte(stopJobBody1)))
+		recorder := httptest.NewRecorder()
+		ctx := context.WithValue(req.Context(), contextUserKey, contextUserValue)
+		r.ServeHTTP(recorder, req.WithContext(ctx))
+		if recorder.Result().StatusCode != http.StatusOK {
+			t.Fatal(recorder.Result().Status, recorder.Body.String())
+		}
+
+		jobid, cluster := int64(999), "testcluster"
+		job, err := restapi.JobRepository.Find(&jobid, &cluster, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if job.State != schema.JobStateFailed {
+			t.Fatalf("expected first job to be failed, got: %s", job.State)
+		}
+	}); !ok {
+		return
+	}
+
+	// Wait for archiving to complete
+	time.Sleep(1 * time.Second)
+
+	// Step 3: Start a NEW job with the same jobId=999 but different startTime.
+	// This job will sit in job_cache (not yet synced).
+	const startJobBody2 string = `{
+		"jobId":            999,
+		"user":             "testuser",
+		"project":          "testproj",
+		"cluster":          "testcluster",
+		"partition":        "default",
+		"walltime":         3600,
+		"numNodes":         1,
+		"numHwthreads":     8,
+		"numAcc":           0,
+		"shared":           "none",
+		"monitoringStatus": 1,
+		"smt":              1,
+		"resources": [{"hostname": "host123", "hwthreads": [0, 1, 2, 3, 4, 5, 6, 7]}],
+		"startTime":        300000000
+	}`
+
+	if ok := t.Run("StartSecondJob", func(t *testing.T) {
+		req := httptest.NewRequest(http.MethodPost, "/jobs/start_job/", bytes.NewBuffer([]byte(startJobBody2)))
+		recorder := httptest.NewRecorder()
+		ctx := context.WithValue(req.Context(), contextUserKey, contextUserValue)
+		r.ServeHTTP(recorder, req.WithContext(ctx))
+		if recorder.Result().StatusCode != http.StatusCreated {
+			t.Fatal(recorder.Result().Status, recorder.Body.String())
+		}
+	}); !ok {
+		return
+	}
+
+	// Step 4: Stop the second job WITHOUT syncing first.
+	// Before the fix, this would fail because Find() on the job table would
+	// match the old failed job (jobId=999) and reject with "already stopped".
+	const stopJobBody2 string = `{
+		"jobId":     999,
+		"startTime": 300000000,
+		"cluster":   "testcluster",
+		"jobState":  "completed",
+		"stopTime":  300001000
+	}`
+
+	t.Run("StopSecondJobBeforeSync", func(t *testing.T) {
+		req := httptest.NewRequest(http.MethodPost, "/jobs/stop_job/", bytes.NewBuffer([]byte(stopJobBody2)))
+		recorder := httptest.NewRecorder()
+		ctx := context.WithValue(req.Context(), contextUserKey, contextUserValue)
+		r.ServeHTTP(recorder, req.WithContext(ctx))
+		if recorder.Result().StatusCode != http.StatusOK {
+			t.Fatalf("expected stop to succeed for cached job, got: %s %s",
+				recorder.Result().Status, recorder.Body.String())
+		}
+	})
+}