Why does git fail on push/fetch with "Too many open files"

Issue

I’m encountering an issue with Git where I’m receiving the following message:

> git fetch
error: cannot create pipe for ssh: Too many open files
fatal: unable to fork

The System Administrators have increased my file limit, but it has not corrected the issue. Additionally, I don’t have an issue with creating new files with vi.

When trying to push a new branch, I get a similar message:

git push origin test_this_broken_git
error: cannot create pipe: Too many open files
fatal: send-pack: unable to fork off sideband demultiplexer

Could somebody answer exactly why this is happening? I have not made any recent changes to my git config and have verified that manually.

Solution

There are two similar error messages:

EMFILE: Too many open files
ENFILE: Too many open files in system

It looks like you’re getting EMFILE, which means that the number of files for an individual process is being exceeded. So, checking whether vi can open files is irrelevant—vi will use its own, separate file table. Check your limits with:

$ ulimit -n
1024

So on my system, there is a limit of 1024 open files in a single process. You shouldn’t need to ask your system administrator (please don’t use the acronym SA, it’s too opaque; if you must abbreviate, use “sysadmin”) to raise the limit.

You may wish to check which files Git opens by running Git under strace.

This could be a bug in Git or in a library, or it could be you’re using an old version of something, or it could be something more bizarre. Try strace first to see which files it opens, and check whether Git closes those files.

Update from Hazok:

After using the above recommendations, it turns out the error was caused by too many loose objects. There were too many loose objects because git gc wasn’t being run often enough.

Answered By – Dietrich Epp

This Answer collected from stackoverflow, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0

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