parcel: `parcel serve` throws an error trying to read cache blob

🐛 bug report

parcel serve after an indeterminate amount of time (sometimes immediately) will throw an error attempting to read a .blob file in the .parcel-cache directory.

🎛 Configuration (.babelrc, package.json, cli command)

No babel config.

package.json as follows:

{
  "name": "web",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "browserslist": [
    "Chrome 78"
  ],
  "scripts": {
    "start": "parcel serve src/index.html",
    "lint": "eslint \"**/*.jsx\"",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-eslint": "^10.1.0",
    "eslint": "^6.1.0",
    "eslint-config-airbnb": "^18.0.1",
    "eslint-plugin-import": "^2.20.2",
    "eslint-plugin-jsx-a11y": "^6.2.3",
    "eslint-plugin-react": "^7.19.0",
    "eslint-plugin-react-hooks": "^3.0.0",
    "parcel": "^2.0.0-nightly.225"
  },
  "dependencies": {
    "@reduxjs/toolkit": "^1.2.3",
    "@xstate/react": "^0.8.1",
    "faker": "^4.1.0",
    "feather-icons": "^4.26.0",
    "firebase": "^7.14.0",
    "fuse.js": "^5.1.0",
    "polished": "^3.5.1",
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-redux": "^7.1.3",
    "react-router-dom": "^5.1.2",
    "redux": "^4.0.5",
    "redux-logger": "^3.0.6",
    "redux-persist": "^6.0.0",
    "styled-components": "^5.0.1",
    "xstate": "^4.8.0"
  }
}

🤔 Expected Behavior

parcel serve to read the cache blob correctly

😯 Current Behavior

> parcel serve src/index.html

ℹ️ Server running at http://localhost:1234
⠏ Optimizing web.[hash].js...
events.js:298
      throw er; // Unhandled 'error' event
      ^

Error: ENOENT: no such file or directory, open '.parcel-cache/50/e8902ca6a84c52e55907a97e40c90b.blob'
Emitted 'error' event on ReadStream instance at:
    at internal/fs/streams.js:163:14
    at FSReqCallback.oncomplete (fs.js:154:23) {
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: '.parcel-cache/50/e8902ca6a84c52e55907a97e40c90b.blob'
}

I can see that the blob file does in-fact exist on disk once I see the error, but I can’t verify if it’s there before.

🔦 Context

Mostly it’s just an inconvenience.

I’ve found that:

Re-running my start script tends to fix it, though not every time.
Removing the .parcel-cache directory appears to be a consistent fix.
Running serve --no-cache doesn’t remedy the problem.

🌍 Your Environment

Software	Version(s)
Parcel	2.0.0-alpha.3.2 (also occurs with 2.0.0-nightly.225)
Node	13.8.0
npm	6.13.6
Operating System	macOS Mojave 10.14.4

About this issue

Original URL
State: closed
Created 4 years ago
Reactions: 4
Comments: 18 (12 by maintainers)

Most upvoted comments

This happens to me too, on OS X.

supercranky on May 3, 2020

I run into the same issue on OS X (2.0.0-alpha.3.2).

ronnyroeller on May 3, 2020

Looks all good to me now 👍

Banou26 on May 20, 2020

Literally the files i sent in my comment, https://github.com/Banou26/parcel-bug-4495

Windows 10, 1909 Node v13.9.0

Banou26 on Apr 24, 2020

Can confirm @Banou26 's issue. Deleting cache does not have an effect.

Gonna revert to parcel 2.0.0-nightly.118, which works.

npm run tsc && parcel src/index.html

ℹ Server running at http://localhost:1234
| Building _object-gopn-ext.js...
events.js:298
      throw er; // Unhandled 'error' event
      ^

Error: ENOENT: no such file or directory, open <my-path>\.parcel-cache\9a\e4977caeecbcb830a3662be71f824d.blob'
Emitted 'error' event on ReadStream instance at:
    at internal/fs/streams.js:163:14
    at FSReqCallback.oncomplete (fs.js:158:23) {
  errno: -4058,
  code: 'ENOENT',
  syscall: 'open',
  path: '<my-path>\\.parcel-cache\\9a\\e4977caeecbcb830a3662be71f824d.blob'
}

ghost on Apr 24, 2020