hexo: Error: EMFILE: too many open files (ulimit does not work on Windows 10)

In the Hexo troubleshooting guide they say to try

$ ulimit -n 10000

…but this does not work on Windows.

Environment Info

Node version

v5.6.0

My site _config.yml

# Hexo Configuration
# Hexo Configuration
## Docs: https://hexo.io/docs/configuration.html
## Source: https://github.com/hexojs/hexo/

# Site
title: Cool New Site
subtitle:
description:
author:  8ctopotamus
language:
timezone:

# URL
## If your site is put in a subdirectory, set url as 'http://yoursite.com/child' and root as '/child/'
url: http://yoursite.com
root: /
permalink: :year/:month/:day/:title/
permalink_defaults:

# Directory
source_dir: source
public_dir: public
tag_dir: tags
archive_dir: archives
category_dir: categories
code_dir: downloads/code
i18n_dir: :lang
skip_render:

# Writing
new_post_name: :title.md # File name of new posts
default_layout: post
titlecase: false # Transform title into titlecase
external_link: true # Open external links in new tab
filename_case: 0
render_drafts: false
post_asset_folder: false
relative_link: false
future: true
highlight:
  enable: true
  line_number: true
  auto_detect: false
  tab_replace:

# Category & Tag
default_category: uncategorized
category_map:
tag_map:

# Date / Time format
## Hexo uses Moment.js to parse and display date
## You can customize the date format as defined in
## http://momentjs.com/docs/#/displaying/format/
date_format: YYYY-MM-DD
time_format: HH:mm:ss

# Pagination
## Set per_page to 0 to disable pagination
per_page: 10
pagination_dir: page

# Extensions
## Plugins: https://hexo.io/plugins/
## Themes: https://hexo.io/themes/
theme: trio-theme

# Deployment
## Docs: https://hexo.io/docs/deployment.html
deploy:
  type:

My theme _config.yml

# Hexo Configuration
# Header
menu:
  VISION: /vision
  DESIGN: /design
  EXECUTION: /execution
  REALIZATION: /realization

rss: /atom.xml

# Content
excerpt_link: Read More

# Sidebar
sidebar: right
widgets:
- category
- tag
- tagcloud
- archive
- recent_posts

# display widgets at the bottom of index pages (pagination == 2)
index_widgets:
- category
- tagcloud
- archive

# widget behavior
archive_type: 'monthly'
show_count: false

# Miscellaneous
google_analytics:
favicon: /favicon.png
twitter:
google_plus:
fb_admins:
fb_app_id:

Plugin version(npm ls --depth 0)

hexo-vanilla-site@0.0.0 ~/hexo-vanilla-site
├── hexo@3.1.1
├── hexo-generator-archive@0.1.4
├── hexo-generator-category@0.1.3
├── hexo-generator-index@0.2.0
├── hexo-generator-tag@0.2.0
├── hexo-renderer-ejs@0.1.1
├── hexo-renderer-marked@0.2.10
├── hexo-renderer-stylus@0.3.1
└── hexo-server@0.1.3

For BUG

I am getting the this error almost every time I run “hexo serve”. I am on WIndows 10 if that makes a difference.

fs.js:584
  return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
                 ^

Error: EMFILE: too many open files, open 'C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\readdirp\stream-api.js'
    at Error (native)
    at Object.fs.openSync (fs.js:584:18)
    at Object.fs.readFileSync (fs.js:431:33)
    at Object.Module._extensions..js (module.js:421:20)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at readdir (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\readdirp\readdirp.js:55:25)
    at FSWatcher.<anonymous> (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\chokidar\lib\nodefs-handler.js:355:5)
    at FSWatcher.NodeFsHandler._handleDir (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\chokidar\lib\nodefs-handler.js:406:18)
    at FSWatcher.<anonymous> (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\chokidar\lib\nodefs-handler.js:455:19)
    at FSWatcher.<anonymous> (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\chokidar\lib\nodefs-handler.js:460:16)
    at FSReqWrap.oncomplete (fs.js:82:15)

log with hexo <command> --debug This is what happens when I do “hexo serve --debug”

λ hexo serve --debug
17:26:02.458 DEBUG Hexo version: 3.2.2
17:26:02.464 DEBUG Working directory: ~\Documents\GitHub\trio-hexo\
17:26:02.587 DEBUG Config loaded: ~\Documents\GitHub\trio-hexo\_config.yml
17:26:02.605 DEBUG Plugin loaded: hexo-generator-category
17:26:02.609 DEBUG Plugin loaded: hexo-generator-index
17:26:02.614 DEBUG Plugin loaded: hexo-generator-archive
17:26:02.620 DEBUG Plugin loaded: hexo-renderer-ejs
17:26:02.625 DEBUG Plugin loaded: hexo-renderer-stylus
17:26:02.627 DEBUG Plugin loaded: hexo-generator-tag
17:26:02.689 DEBUG Plugin loaded: hexo-server
17:26:02.696 DEBUG Plugin loaded: hexo-renderer-marked
17:26:02.710 DEBUG Loading database.
17:26:02.937 INFO  Start processing
17:26:03.721 DEBUG Processed: Design/index.md
17:26:03.722 DEBUG Processed: Execution/index.md
17:26:03.722 DEBUG Processed: Realization/index.md
17:26:03.723 DEBUG Processed: _posts/hello-world.md
17:26:03.723 DEBUG Processed: _posts/second-post.md
17:26:03.724 DEBUG Processed: vision/index.md
fs.js:584
  return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
                 ^

Error: EMFILE: too many open files, open 'C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\readdirp\stream-api.js'
    at Error (native)
    at Object.fs.openSync (fs.js:584:18)
    at Object.fs.readFileSync (fs.js:431:33)
    at Object.Module._extensions..js (module.js:421:20)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at readdir (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\readdirp\readdirp.js:55:25)
    at FSWatcher.<anonymous> (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\chokidar\lib\nodefs-handler.js:355:5)
    at FSWatcher.NodeFsHandler._handleDir (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\chokidar\lib\nodefs-handler.js:406:18)
    at FSWatcher.<anonymous> (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\chokidar\lib\nodefs-handler.js:455:19)
    at FSWatcher.<anonymous> (C:\Users\joshn\Documents\GitHub\trio-hexo\node_modules\chokidar\lib\nodefs-handler.js:460:16)
    at FSReqWrap.oncomplete (fs.js:82:15)

About this issue

Original URL
State: closed
Created 8 years ago
Reactions: 2
Comments: 21 (7 by maintainers)

Most upvoted comments

Thanks for your request!

Before I make a pull request, I should make test cases for the patch. But I found that existing test script for watch() function was not enough. So I’m trying to improve it. https://github.com/hexojs/hexo/blob/master/test/scripts/hexo/hexo.js

I’m sorry for the delay, but I’ll make a pull request. 😉

seaoak on Apr 27, 2017

Could you taste my new patch?

The patch which I wrote in above comment is not enough. It makes Hexo turning-off only watch() for node_modules. Hexo continuously calls readdir() for all subdirectories in node_modules.

I make new patch to turn-off readdir()/watch() for specified directories. Under the patch, Hexo will ignore node_modules directory and .git directory and all their subdirectories. Hexo will NEVER call either readdir() nor watch() for these directories.

And also you can configure which directores are ignored. You can write ignored_path: setting in _config.yml (such as after skip_render: setting) as follows:

ignored_path:
 - node_modules
 - .git
 - bower_components
 - /[\/\\](\.git[^\/\\]*)[\/\\]?$/i

At this time, you can not use glob expressions, but you can use regular expressions instead. I’m just getting ahead in myself. I will reverse them (suit to skip_render: setting).

My repository is: https://github.com/seaoak/hexo.git

The branch is: feature/allow-turning-off-reading-and-watching-for-specified-directories

Please checkout the HEAD of above branch.

p.s. When you execute hexo, you will see many debugging messages. You can filter them by grep -v 'seaoak '. I’m sorry.

seaoak on Dec 28, 2016