What This Error Means
npm hit ENFILE because the whole system reached its open-file limit, so new files or sockets could not be opened.
How to Fix It
Identify the path npm is failing on (look for the last referenced file path in the error output).
Increase open file limits (ulimit -n) and retry. Also close background tools that watch many files.
Retry after cleaning local state when safe (common:remove node_modules and retry install).
Why It Happens
The process (or system) hit open file limits while npm was reading/writing many files.
How to Verify
Re-run the original command and confirm the filesystem error no longer appears.
If this is a permission fix, confirm new files in node_modules are owned by the expected user.
Manual filesystem checks
Check file descriptor limits:ulimit -n
Examples
npm ERR! code ENFILEPrevention Tips
Keep npm cache and project directories owned by the build user.
Avoid running project installs as root unless you know exactly why you need it.
Ensure CI runners have enough disk space and sensible file descriptor limits.
Where This Can Be Triggered
github.com/npm/cli/blob/417daa72b09c5129e7390cd12743ef31bf3ddb83/lib/commands/cache.js
This is a representative filesystem write path during npm operations. Filesystem codes like this are raised by Node/OS when this write fails. - GitHub
break
}
output.standard(`Deleted: ${key}`)
await cacache.rm.entry(cachePath, key)
// XXX this could leave other entries without content!
await cacache.rm.content(cachePath, entry.integrity)
}