Harden generation task lifecycle

src/aiTaskWorker.js

@@ -5,6 +5,8 @@ const { EventEmitter } = require("node:events");
 const { pool } = require("./db");
 const { refundTaskBillingOnFailure } = require("./billing");
 const { putObject, isOssConfigured } = require("./ossClient");
+const keyManager = require("./keyManager");
+const { resolveImageProviderCandidates, resolveVideoProvider } = require("./aiProviderRouter");
 
 const taskEvents = new EventEmitter();
 taskEvents.setMaxListeners(200);
@@ -13,6 +15,10 @@ const activePollers = new Map();
 const POLL_INTERVAL_MS = 3000;
 const MAX_POLL_ATTEMPTS = 120;
 const GRS_IMAGE_MAX_POLL_ATTEMPTS = Number(process.env.GRSAI_IMAGE_MAX_POLL_ATTEMPTS || 60);
+const STALE_TASK_TIMEOUT_MINUTES = Math.max(10, Number(process.env.STALE_GENERATION_TASK_MINUTES || 120));
+const RESULT_PERSIST_RETRY_LIMIT = Math.max(1, Number(process.env.RESULT_PERSIST_RETRY_LIMIT || 5));
+const RESULT_PERSIST_RETRY_BATCH_SIZE = Math.max(1, Number(process.env.RESULT_PERSIST_RETRY_BATCH_SIZE || 25));
+const TASK_STARTUP_RECOVERY_LIMIT = Math.max(1, Number(process.env.TASK_STARTUP_RECOVERY_LIMIT || 50));
 
 function normalizeTaskProgress(value) {
   const numeric = Number(value);
@@ -92,8 +98,9 @@ async function updateTaskInDb(taskId, updates) {
 
   if (fields.length === 0) return;
   values.push(taskId);
+  const protectCancelled = nextUpdates.status !== "cancelled" ? " AND status <> 'cancelled'" : "";
   const { rows } = await pool.query(
-    `UPDATE generation_tasks SET ${fields.join(", ")} WHERE id = $${idx} RETURNING *`,
+    `UPDATE generation_tasks SET ${fields.join(", ")} WHERE id = $${idx}${protectCancelled} RETURNING *`,
     values,
   );
   let updatedTask = rows[0];
@@ -124,20 +131,66 @@ function persistTaskResultUrlToOssInBackground(task) {
 
   Promise.resolve()
     .then(async () => {
-      const durableUrl = await persistResultUrlToOss(task);
-      if (!durableUrl || durableUrl === task.result_url) return;
-
-      await pool.query(
-        "UPDATE generation_tasks SET result_url = $1, updated_at = NOW() WHERE id = $2 AND result_url = $3",
-        [durableUrl, task.id, task.result_url],
-      );
-      console.info(`[aiTaskWorker] task ${task.id} result persisted to OSS after completion`);
+      await persistTaskResultUrlToOss(task);
     })
     .catch((error) => {
       console.warn(`[aiTaskWorker] background result persistence failed for task ${task.id}:`, error.message);
     });
 }
 
+async function markResultPersistence(taskId, status, error = null, durableUrl = null, previousUrl = null) {
+  const fields = [
+    "result_persist_status = $1",
+    "result_persist_attempts = result_persist_attempts + 1",
+    "result_persist_error = $2",
+    "updated_at = NOW()",
+  ];
+  const values = [status, error ? String(error).slice(0, 1000) : null];
+  let idx = values.length + 1;
+
+  if (status === "succeeded") {
+    fields.push("result_persisted_at = NOW()");
+  }
+  if (durableUrl) {
+    fields.push(`result_url = $${idx++}`);
+    values.push(durableUrl);
+  }
+
+  values.push(taskId);
+  let where = `id = $${idx}`;
+  if (previousUrl) {
+    idx += 1;
+    values.push(previousUrl);
+    where += ` AND result_url = $${idx}`;
+  }
+
+  await pool.query(`UPDATE generation_tasks SET ${fields.join(", ")} WHERE ${where}`, values);
+}
+
+async function persistTaskResultUrlToOss(task) {
+  if (!task?.id || !task?.result_url) return null;
+
+  if (isOwnPersistedResultUrl(task.result_url)) {
+    await markResultPersistence(task.id, "succeeded", null, null);
+    return task.result_url;
+  }
+
+  if (!isOssConfigured()) {
+    await markResultPersistence(task.id, "failed", "OSS is not configured");
+    return null;
+  }
+
+  const durableUrl = await persistResultUrlToOss(task);
+  if (!durableUrl) {
+    await markResultPersistence(task.id, "failed", "Result URL could not be copied to OSS");
+    return null;
+  }
+
+  await markResultPersistence(task.id, "succeeded", null, durableUrl, task.result_url);
+  console.info(`[aiTaskWorker] task ${task.id} result persisted to OSS after completion`);
+  return durableUrl;
+}
+
 function asObject(value) {
   return value && typeof value === "object" && !Array.isArray(value) ? value : undefined;
 }
@@ -636,35 +689,41 @@ function getMaxPollAttempts(type, providerConfig) {
   return MAX_POLL_ATTEMPTS;
 }
 
+async function releasePollingLease(poller) {
+  if (!poller?.leaseToken || !poller?.keyManager) return;
+  await poller.keyManager.releaseKey(poller.leaseToken).catch((err) => {
+    console.warn(`[aiTaskWorker] release lease failed for task ${poller.taskDbId}:`, err.message);
+  });
+}
+
 function startPolling(taskDbId, { providerTaskId, apiKey, type, providerConfig, leaseToken, keyManager, onTaskFailed }) {
   if (activePollers.has(taskDbId)) return;
 
   let attempts = 0;
+  let polling = false;
   const maxPollAttempts = getMaxPollAttempts(type, providerConfig);
   const interval = setInterval(async () => {
+    if (polling) return;
+    polling = true;
     attempts++;
-    if (attempts > maxPollAttempts) {
-      clearInterval(interval);
-      activePollers.delete(taskDbId);
-      if (leaseToken && keyManager) await keyManager.releaseKey(leaseToken).catch(() => {});
-      if (typeof onTaskFailed === "function") {
-        const handled = await onTaskFailed("Task timed out").catch((fallbackErr) => {
-          console.error(`[aiTaskWorker] fallback error for task ${taskDbId}:`, fallbackErr.message);
-          return false;
-        });
-        if (handled) return;
-      }
-      await updateTaskInDb(taskDbId, { status: "failed", error: "Task timed out" });
-      return;
-    }
 
     try {
-      // Check if task was cancelled by user
+      if (attempts > maxPollAttempts) {
+        await stopPolling(taskDbId, { releaseLease: true });
+        if (typeof onTaskFailed === "function") {
+          const handled = await onTaskFailed("Task timed out").catch((fallbackErr) => {
+            console.error(`[aiTaskWorker] fallback error for task ${taskDbId}:`, fallbackErr.message);
+            return false;
+          });
+          if (handled) return;
+        }
+        await updateTaskInDb(taskDbId, { status: "failed", error: "Task timed out" });
+        return;
+      }
+
       const { rows: [taskRow] } = await pool.query("SELECT status FROM generation_tasks WHERE id = $1", [taskDbId]);
       if (!taskRow || taskRow.status === "cancelled") {
-        clearInterval(interval);
-        activePollers.delete(taskDbId);
-        if (leaseToken && keyManager) await keyManager.releaseKey(leaseToken).catch(() => {});
+        await stopPolling(taskDbId, { releaseLease: true });
         return;
       }
 
@@ -680,9 +739,7 @@ function startPolling(taskDbId, { providerTaskId, apiKey, type, providerConfig,
       }
 
       if (result.status === "completed" || result.status === "failed") {
-        clearInterval(interval);
-        activePollers.delete(taskDbId);
-        if (leaseToken && keyManager) await keyManager.releaseKey(leaseToken).catch(() => {});
+        await stopPolling(taskDbId, { releaseLease: true });
         if (result.status === "failed" && typeof onTaskFailed === "function") {
           const handled = await onTaskFailed(result.error || "Task failed").catch((fallbackErr) => {
             console.error(`[aiTaskWorker] fallback error for task ${taskDbId}:`, fallbackErr.message);
@@ -695,68 +752,226 @@ function startPolling(taskDbId, { providerTaskId, apiKey, type, providerConfig,
       await updateTaskInDb(taskDbId, result);
     } catch (err) {
       console.error(`[aiTaskWorker] poll error for task ${taskDbId}:`, err.message);
+    } finally {
+      polling = false;
     }
   }, POLL_INTERVAL_MS);
 
-  activePollers.set(taskDbId, { interval, leaseToken });
+  activePollers.set(taskDbId, { taskDbId, interval, leaseToken, keyManager });
 }
 
-function stopPolling(taskDbId) {
+async function stopPolling(taskDbId, options = {}) {
   const poller = activePollers.get(taskDbId);
-  if (poller) {
-    clearInterval(poller.interval);
-    activePollers.delete(taskDbId);
+  if (!poller) return;
+
+  clearInterval(poller.interval);
+  activePollers.delete(taskDbId);
+  if (options.releaseLease) {
+    await releasePollingLease(poller);
   }
 }
 
+async function cancelTask(taskId, userId) {
+  const { rows } = await pool.query(
+    `UPDATE generation_tasks
+     SET status = 'cancelled', completed_at = NOW(), updated_at = NOW()
+     WHERE id = $1 AND user_id = $2 AND status IN ('pending', 'running')
+     RETURNING *`,
+    [taskId, userId],
+  );
+  const task = rows[0];
+  if (!task) return null;
+
+  await stopPolling(task.id, { releaseLease: true });
+  taskEvents.emit(`task:${task.id}`, formatTaskEvent(task));
+  return task;
+}
+
 function getActiveCount() {
   return activePollers.size;
 }
 
-// --- Periodic stale task cleanup ---
-// Runs every 5 minutes, marks tasks stuck in 'pending'/'running' for too long as 'failed'.
-// This catches cases where the worker crashed, the provider API never responded,
-// or the cancel request failed silently on the client side.
 const STALE_TASK_CLEANUP_INTERVAL_MS = 5 * 60 * 1000;
 let staleTaskCleanupTimer = null;
+const TASK_RESULT_PERSIST_RETRY_INTERVAL_MS = 5 * 60 * 1000;
+let taskResultPersistenceRetryTimer = null;
+let taskStartupRecoveryTimer = null;
+let taskStaleCleanupRunning = false;
+let taskResultPersistenceRetryRunning = false;
+let taskStartupRecoveryRunning = false;
+
+function parseTaskParams(paramsJson) {
+  if (!paramsJson) return {};
+  if (typeof paramsJson === "object") return paramsJson;
+  try {
+    const parsed = JSON.parse(paramsJson);
+    return parsed && typeof parsed === "object" ? parsed : {};
+  } catch {
+    return {};
+  }
+}
+
+function resolveProviderConfigForRecovery(task) {
+  const params = parseTaskParams(task.params_json);
+
+  if (task.type === "video") {
+    if (params.model === "video-style-transform" || params.operation === "video-style-super-resolution") {
+      return { provider: "dashscope", protocol: "wan-i2v", baseUrl: "https://dashscope.aliyuncs.com" };
+    }
+    if (params.model === "aliyun-video-super-resolve" || params.model === "aliyun-erase-subtitles") {
+      return null;
+    }
+    return resolveVideoProvider(params.model);
+  }
+
+  if (task.type === "image") {
+    if (params.operation === "image-super-resolution" || params.operation === "image-edit") {
+      return { provider: "dashscope", transport: "dashscope-image" };
+    }
+    const candidates = resolveImageProviderCandidates(params.model);
+    return candidates[0] || null;
+  }
+
+  return null;
+}
+
+function normalizeRecoveryUser(task) {
+  return {
+    id: task.user_id,
+    enterpriseId: task.enterprise_id ?? null,
+    accountType: task.enterprise_id ? "enterprise" : "personal",
+  };
+}
 
 async function runStaleTaskCleanup() {
+  if (taskStaleCleanupRunning) return;
+  taskStaleCleanupRunning = true;
   try {
     const { rows } = await pool.query(
       `UPDATE generation_tasks
-       SET status = 'failed', error = '任务超时自动释放', updated_at = NOW()
+       SET status = 'failed',
+           error = 'Task timed out and was released automatically',
+           completed_at = NOW(),
+           updated_at = NOW()
        WHERE status IN ('pending', 'running')
-         AND GREATEST(updated_at, COALESCE(last_poll_at, created_at)) < NOW() - INTERVAL '10 minutes'
-       RETURNING id`,
+         AND GREATEST(updated_at, COALESCE(last_poll_at, created_at)) < NOW() - ($1::int * INTERVAL '1 minute')
+       RETURNING *`,
+      [STALE_TASK_TIMEOUT_MINUTES],
     );
+
     for (const row of rows) {
-      taskEvents.emit(`task:${row.id}`, {
-        taskId: row.id,
-        status: "failed",
-        progress: null,
-        resultUrl: null,
-        error: "任务超时自动释放",
+      await stopPolling(row.id, { releaseLease: true });
+      taskEvents.emit(`task:${row.id}`, formatTaskEvent(row));
+      await refundTaskBillingOnFailure(row.id).catch((err) => {
+        console.error(`[aiTaskWorker] stale task refund error for task ${row.id}:`, err.message);
       });
-      // Also stop any active poller for this task
-      const poller = activePollers.get(row.id);
-      if (poller) {
-        clearInterval(poller.timer);
-        activePollers.delete(row.id);
-      }
     }
+
     if (rows.length > 0) {
       console.log(`[aiTaskWorker] Cleaned up ${rows.length} stale task(s)`);
     }
   } catch (err) {
     console.error("[aiTaskWorker] Stale task cleanup failed:", err.message);
+  } finally {
+    taskStaleCleanupRunning = false;
+  }
+}
+
+async function runResultPersistenceRetry() {
+  if (taskResultPersistenceRetryRunning) return;
+  taskResultPersistenceRetryRunning = true;
+  try {
+    const { rows } = await pool.query(
+      `SELECT *
+       FROM generation_tasks
+       WHERE status = 'completed'
+         AND result_url IS NOT NULL
+         AND result_url ~* '^https?://'
+         AND result_url !~* '/users/[^/]+/generation-results/'
+         AND result_persist_status IN ('pending', 'failed')
+         AND result_persist_attempts < $1
+       ORDER BY updated_at ASC
+       LIMIT $2`,
+      [RESULT_PERSIST_RETRY_LIMIT, RESULT_PERSIST_RETRY_BATCH_SIZE],
+    );
+
+    for (const row of rows) {
+      await persistTaskResultUrlToOss(row);
+    }
+
+    if (rows.length > 0) {
+      console.log(`[aiTaskWorker] Retried OSS result persistence for ${rows.length} task(s)`);
+    }
+  } catch (err) {
+    console.error("[aiTaskWorker] Result persistence retry failed:", err.message);
+  } finally {
+    taskResultPersistenceRetryRunning = false;
+  }
+}
+
+async function runTaskStartupRecovery() {
+  if (taskStartupRecoveryRunning) return;
+  taskStartupRecoveryRunning = true;
+  try {
+    const { rows } = await pool.query(
+      `SELECT gt.*, u.enterprise_id
+       FROM generation_tasks gt
+       JOIN users u ON u.id = gt.user_id
+       WHERE gt.status = 'running'
+         AND gt.provider_task_id IS NOT NULL
+         AND GREATEST(gt.updated_at, COALESCE(gt.last_poll_at, gt.created_at)) >= NOW() - ($1::int * INTERVAL '1 minute')
+       ORDER BY gt.updated_at DESC
+       LIMIT $2`,
+      [STALE_TASK_TIMEOUT_MINUTES, TASK_STARTUP_RECOVERY_LIMIT],
+    );
+
+    let recovered = 0;
+    for (const task of rows) {
+      if (activePollers.has(task.id)) continue;
+
+      let providerConfig;
+      try {
+        providerConfig = resolveProviderConfigForRecovery(task);
+      } catch (err) {
+        console.warn(`[aiTaskWorker] task ${task.id} recovery skipped: ${err.message}`);
+        continue;
+      }
+
+      if (!providerConfig?.provider) continue;
+      const slotResult = await keyManager.acquireKey(providerConfig.provider, normalizeRecoveryUser(task), null, { waitTimeoutMs: 0 });
+      if (!slotResult) {
+        console.warn(`[aiTaskWorker] task ${task.id} recovery waiting for provider capacity: ${providerConfig.provider}`);
+        continue;
+      }
+
+      startPolling(task.id, {
+        providerTaskId: task.provider_task_id,
+        apiKey: slotResult.apiKey,
+        type: task.type,
+        providerConfig,
+        leaseToken: slotResult.leaseToken,
+        keyManager,
+      });
+      recovered += 1;
+    }
+
+    if (recovered > 0) {
+      console.log(`[aiTaskWorker] Recovered ${recovered} running task poller(s) after startup`);
+    }
+  } catch (err) {
+    console.error("[aiTaskWorker] Startup task recovery failed:", err.message);
+  } finally {
+    taskStartupRecoveryRunning = false;
   }
 }
 
 function startStaleTaskCleanup() {
   if (staleTaskCleanupTimer) return;
   staleTaskCleanupTimer = setInterval(runStaleTaskCleanup, STALE_TASK_CLEANUP_INTERVAL_MS);
-  // Run once shortly after startup
+  taskResultPersistenceRetryTimer = setInterval(runResultPersistenceRetry, TASK_RESULT_PERSIST_RETRY_INTERVAL_MS);
+  taskStartupRecoveryTimer = setTimeout(runTaskStartupRecovery, 5_000);
   setTimeout(runStaleTaskCleanup, 10_000);
+  setTimeout(runResultPersistenceRetry, 15_000);
 }
 
 function stopStaleTaskCleanup() {
@@ -764,11 +979,20 @@ function stopStaleTaskCleanup() {
     clearInterval(staleTaskCleanupTimer);
     staleTaskCleanupTimer = null;
   }
+  if (taskResultPersistenceRetryTimer) {
+    clearInterval(taskResultPersistenceRetryTimer);
+    taskResultPersistenceRetryTimer = null;
+  }
+  if (taskStartupRecoveryTimer) {
+    clearTimeout(taskStartupRecoveryTimer);
+    taskStartupRecoveryTimer = null;
+  }
 }
 
 module.exports = {
   startPolling,
   stopPolling,
+  cancelTask,
   updateTaskInDb,
   getActiveCount,
   extractProviderTaskId,

src/dbSetup.js

@@ -353,6 +353,18 @@ async function migrateGenerationTasksBillingColumns(client) {
   );
 }
 
+async function migrateGenerationTaskResultPersistence(client) {
+  await addColumnIfMissing("generation_tasks", "result_persist_status TEXT NOT NULL DEFAULT 'pending'");
+  await addColumnIfMissing("generation_tasks", "result_persist_attempts INTEGER NOT NULL DEFAULT 0");
+  await addColumnIfMissing("generation_tasks", "result_persist_error TEXT");
+  await addColumnIfMissing("generation_tasks", "result_persisted_at TIMESTAMPTZ");
+  await client.query(`
+    CREATE INDEX IF NOT EXISTS idx_generation_tasks_result_persist_retry
+      ON generation_tasks(result_persist_status, updated_at)
+      WHERE status = 'completed' AND result_url IS NOT NULL
+  `);
+}
+
 async function ensureModelPriceSeed() {
   const columns = await getColumnNames("model_prices");
   const useMills = columns.includes("input_price_mills");
@@ -959,6 +971,7 @@ async function ensureSchema() {
   await runMigration("030_generation_tasks_user_status_index", migrateGenerationTasksUserStatusIndex);
   await runMigration("031_generation_tasks_billing_columns", migrateGenerationTasksBillingColumns);
   await runMigration("032_ecommerce_video_history", migrateEcommerceVideoHistorySchema);
+  await runMigration("033_generation_task_result_persistence", migrateGenerationTaskResultPersistence);
   await ensureModelPriceSeed();
 }
 

src/keyManager.js

@@ -284,7 +284,7 @@ async function releaseLeaseInternal(leaseToken, user, options = {}) {
     const { rows } = await client.query(
       `
       WITH candidate AS (
-        SELECT l.id, l.key_id, k.provider
+        SELECT l.id, l.key_id, l.user_id, l.enterprise_id, k.provider
         FROM key_leases l
         JOIN api_keys k ON k.id = l.key_id
         WHERE l.lease_token = $1 AND l.released_at IS NULL
@@ -298,6 +298,7 @@ async function releaseLeaseInternal(leaseToken, user, options = {}) {
         RETURNING id, key_id
       )
       SELECT r.id, r.key_id, c.provider
+           , c.user_id, c.enterprise_id
       FROM released r
       JOIN candidate c ON c.key_id = r.key_id
     `,
@@ -339,7 +340,7 @@ async function releaseLeaseInternal(leaseToken, user, options = {}) {
       INSERT INTO usage_logs (user_id, enterprise_id, provider, key_id, action)
       VALUES ($1, $2, (SELECT provider FROM api_keys WHERE id = $3), $4, $5)
     `,
-      [userId, enterpriseId, lease.key_id, lease.key_id, "release"],
+      [userId ?? lease.user_id, enterpriseId ?? lease.enterprise_id, lease.key_id, lease.key_id, "release"],
     );
 
     return {

src/routes/ai.js

@@ -16,6 +16,7 @@ const {
 } = require("../enterpriseVideoBilling");
 const {
   startPolling,
+  cancelTask,
   updateTaskInDb,
   extractProviderTaskId,
   extractImageUrl,
@@ -1770,12 +1771,9 @@ function registerAiRoutes(router) {
     if (!Number.isFinite(taskId)) return res.status(400).json({ error: "Invalid task id" });
 
     try {
-      const { rows } = await pool.query(
-        "UPDATE generation_tasks SET status = 'cancelled', updated_at = NOW() WHERE id = $1 AND user_id = $2 AND status IN ('pending', 'running') RETURNING id, status",
-        [taskId, req.user.id],
-      );
-      if (rows.length === 0) return res.status(404).json({ error: "Task not found or not in active state" });
-      res.json({ id: rows[0].id, status: rows[0].status });
+      const task = await cancelTask(taskId, req.user.id);
+      if (!task) return res.status(404).json({ error: "Task not found or not in active state" });
+      res.json({ id: task.id, status: task.status });
     } catch (err) {
       console.error("[ai/task-cancel] error:", err.message);
       res.status(500).json({ error: "取消任务失败" });