fix: stabilize concurrent PDF parsing

Author: c121914yu

deploy/version/v4.15/docker-compose.template.yml

@@ -133,7 +133,7 @@ x-service-env-config: &x-service-env-config
   CHAT_TITLE_MODEL:
   SKIP_FILE_TYPE_CHECK: false
   WECHAT_CHANNEL_CONCURRENCY: 1000
-  PARSE_FILE_WORKERS: 10
+  PARSE_FILE_WORKERS: 5
   PARSE_FILE_TIMEOUT_SECONDS: 600
   HTML_TO_MARKDOWN_WORKERS: 10
   TEXT_TO_CHUNKS_WORKERS: 10

document/content/self-host/config/env.en.mdx

@@ -182,7 +182,7 @@ These variables are mainly validated by `packages/service/env.ts` and apply to `
 | `AGENT_ENGINE`                         | `fastAgent` | Agent engine. Supported values are `fastAgent` and `piAgent`.                                                                                                                 |
 | `SKIP_FILE_TYPE_CHECK`                 | `false`     | Whether upload file type checks are skipped.                                                                                                                                  |
 | `WECHAT_CHANNEL_CONCURRENCY`           | `1000`      | WeChat channel poll worker concurrency. Minimum value is `10`.                                                                                                                |
-| `PARSE_FILE_WORKERS`                   | `10`        | Resident file parsing worker count.                                                                                                                                           |
+| `PARSE_FILE_WORKERS`                   | `5`         | Resident file parsing worker count.                                                                                                                                           |
 | `HTML_TO_MARKDOWN_WORKERS`             | `10`        | Resident HTML-to-Markdown worker count.                                                                                                                                       |
 | `TEXT_TO_CHUNKS_WORKERS`               | `10`        | Resident text chunking worker count.                                                                                                                                          |
 | `PARSE_FILE_TIMEOUT_SECONDS`           | `600`       | Timeout for one file parsing task, in seconds.                                                                                                                                |

document/content/self-host/config/env.mdx

@@ -182,7 +182,7 @@ description: projects/app、projects/code-sandbox 与 pro/admin 环境变量说
 | `AGENT_ENGINE`                         | `fastAgent` | Agent 引擎，可选 `fastAgent` 或 `piAgent`。                                                    |
 | `SKIP_FILE_TYPE_CHECK`                 | `false`     | 是否跳过上传文件类型检查。                                                                     |
 | `WECHAT_CHANNEL_CONCURRENCY`           | `1000`      | 微信渠道 poll worker 并发数，最小 `10`。                                                       |
-| `PARSE_FILE_WORKERS`                   | `10`        | 文件解析 worker 常驻线程数。                                                                   |
+| `PARSE_FILE_WORKERS`                   | `5`         | 文件解析 worker 常驻线程数。                                                                   |
 | `HTML_TO_MARKDOWN_WORKERS`             | `10`        | HTML 转 Markdown worker 常驻线程数。                                                           |
 | `TEXT_TO_CHUNKS_WORKERS`               | `10`        | 文本切块 worker 常驻线程数。                                                                   |
 | `PARSE_FILE_TIMEOUT_SECONDS`           | `600`       | 文件解析单任务超时时间，单位秒。                                                               |

document/content/self-host/upgrading/4-15/4152.en.mdx

@@ -42,7 +42,8 @@ The previous values are no longer supported. Using `default` or `pi` will fail e
 5. Files generated by system tools no longer expire after 1 hour. They are now long-lived and deleted together with the conversation.
 6. The registration button is now hidden in Sync Mode.
 7. Improved the performance of the fade-in effect for streaming output in chat dialogs.
-8. Upgraded `LiteParse` to fix PDF parsing errors under concurrent workloads.
+8. Upgraded `LiteParse` to fix PDF parsing errors under concurrent workloads. The default file parsing worker count is now 5 instead of 10 and remains configurable through `PARSE_FILE_WORKERS`.
+9. Added in-flight request deduplication for the model list and sandbox package endpoints. Identical concurrent requests now share the same result, reducing duplicate requests triggered by workflow nodes and selectors.
 
 ### Streaming Markdown Rendering Improvements
 

document/content/self-host/upgrading/4-15/4152.mdx

@@ -40,7 +40,8 @@ V4.15.2 起，`AGENT_ENGINE` 使用新的枚举值。升级前，请按下表修
 5. 系统工具生成的文件不会 1 小时过期，改成长期，跟随会话一起删除。
 6. 同步模式下不显示注册用户按钮。
 7. 对话框流输出，淡入效果性能优化。
-8. 升级 `LiteParse` 版本，解决并发解析 PDF 报错问题。
+8. 升级 `LiteParse` 版本，解决并发解析 PDF 报错问题；文件解析 worker 默认数量由 10 调整为 5，仍可通过 `PARSE_FILE_WORKERS` 配置。
+9. 前端请求增加并发去重能力，模型列表和沙盒依赖接口的相同请求会复用进行中的结果，减少工作流节点和选择器重复触发的请求。
 
 ## 🐛 修复
 

document/data/doc-last-modified.json

@@ -320,8 +320,8 @@
   "content/self-host/upgrading/4-15/41507.mdx": "2026-06-30T17:31:43+08:00",
   "content/self-host/upgrading/4-15/4151.en.mdx": "2026-07-07T21:14:28+08:00",
   "content/self-host/upgrading/4-15/4151.mdx": "2026-07-07T21:14:28+08:00",
-  "content/self-host/upgrading/4-15/4152.en.mdx": "2026-07-16T13:18:15+08:00",
-  "content/self-host/upgrading/4-15/4152.mdx": "2026-07-16T17:25:54+08:00",
+  "content/self-host/upgrading/4-15/4152.en.mdx": "2026-07-16T17:54:31+08:00",
+  "content/self-host/upgrading/4-15/4152.mdx": "2026-07-16T17:54:31+08:00",
   "content/self-host/upgrading/outdated/40.en.mdx": "2026-04-26T21:08:47+08:00",
   "content/self-host/upgrading/outdated/40.mdx": "2026-04-26T21:08:47+08:00",
   "content/self-host/upgrading/outdated/41.en.mdx": "2026-04-26T21:08:47+08:00",

document/public/deploy/docker/v4.15/cn/docker-compose.milvus.yml

@@ -133,7 +133,7 @@ x-service-env-config: &x-service-env-config
   CHAT_TITLE_MODEL:
   SKIP_FILE_TYPE_CHECK: false
   WECHAT_CHANNEL_CONCURRENCY: 1000
-  PARSE_FILE_WORKERS: 10
+  PARSE_FILE_WORKERS: 5
   PARSE_FILE_TIMEOUT_SECONDS: 600
   HTML_TO_MARKDOWN_WORKERS: 10
   TEXT_TO_CHUNKS_WORKERS: 10

document/public/deploy/docker/v4.15/cn/docker-compose.oceanbase.yml

@@ -133,7 +133,7 @@ x-service-env-config: &x-service-env-config
   CHAT_TITLE_MODEL:
   SKIP_FILE_TYPE_CHECK: false
   WECHAT_CHANNEL_CONCURRENCY: 1000
-  PARSE_FILE_WORKERS: 10
+  PARSE_FILE_WORKERS: 5
   PARSE_FILE_TIMEOUT_SECONDS: 600
   HTML_TO_MARKDOWN_WORKERS: 10
   TEXT_TO_CHUNKS_WORKERS: 10

document/public/deploy/docker/v4.15/cn/docker-compose.opengauss.yml

@@ -133,7 +133,7 @@ x-service-env-config: &x-service-env-config
   CHAT_TITLE_MODEL:
   SKIP_FILE_TYPE_CHECK: false
   WECHAT_CHANNEL_CONCURRENCY: 1000
-  PARSE_FILE_WORKERS: 10
+  PARSE_FILE_WORKERS: 5
   PARSE_FILE_TIMEOUT_SECONDS: 600
   HTML_TO_MARKDOWN_WORKERS: 10
   TEXT_TO_CHUNKS_WORKERS: 10

document/public/deploy/docker/v4.15/cn/docker-compose.pg.yml

@@ -133,7 +133,7 @@ x-service-env-config: &x-service-env-config
   CHAT_TITLE_MODEL:
   SKIP_FILE_TYPE_CHECK: false
   WECHAT_CHANNEL_CONCURRENCY: 1000
-  PARSE_FILE_WORKERS: 10
+  PARSE_FILE_WORKERS: 5
   PARSE_FILE_TIMEOUT_SECONDS: 600
   HTML_TO_MARKDOWN_WORKERS: 10
   TEXT_TO_CHUNKS_WORKERS: 10