Let's work through these problems step by step—don't worry, your local work is completely safe, we just need to sort out the configuration and network-related hurdles stopping your push.

1. Resolve the git: 'credential-manager' is not a git command Error #

This error is interrupting your push flow because Git can't find the credential helper it's configured to use. Here's how to fix it:

• First, check your current credential setup:

  git config --list | grep credential
  

• If you see a line like credential.helper=credential-manager, that's the issue. You have a few options:
  • Quick test fix: Remove the invalid helper temporarily to rule out authentication blocks:

    git config --global --unset credential.helper
    

  • Set a valid helper for your system:
    • Windows: Install the official Git Credential Manager, then run:

      git config --global credential.helper manager-core
      

    • macOS: Use the built-in keychain integration:

      git config --global credential.helper osxkeychain
      

    • Linux: Use libsecret (install it via your package manager first, e.g., sudo apt install libsecret-1-0 libsecret-1-dev), then run:

      git config --global credential.helper /usr/share/git-core/git-credential-libsecret
      

2. Fix RPC Failures, Push Stalls, and unexpected disconnect Errors #

Your push is transferring a 327.92 MiB pack—way over Git's default HTTP buffer limits, which causes timeouts and SSL disconnects. Here's how to address this:

Step 1: Increase Git's HTTP Buffer Limits #

Tell Git to handle larger payloads with these commands:

git config --global http.postBuffer 524288000  # 500MB, more than your 327MB pack
git config --global http.maxRequestBuffer 100M
git config --global core.compression 0  # Temporarily disable compression to speed up transfer

Step 2: Identify and Manage Large Files #

Oversized files are the root cause of the huge pack. Find the largest files in your repository:

# List the top 10 largest files in your commit history
git rev-list --objects --all | grep "$(git verify-pack -v .git/objects/pack/*.idx | sort -k 3 -n | tail -10 | awk '{print $1}')"

If you find files that don't belong in the remote repo:

• If you haven't pushed these files yet, remove them from tracking and ignore them:

  git rm --cached path/to/large-file.ext
  echo "path/to/large-file.ext" >> .gitignore
  git commit -m "Remove large file from tracking"
  

• If you already committed them, use git filter-repo to rewrite history and strip out the large files (only do this if you haven't shared the branch with others).

Step 3: Push in Smaller Batches #

Instead of pushing all changes at once, split the push into smaller chunks. For example, push the last 3 commits first, then the rest:

# Push up to 3 commits back (replace `main` with your branch name)
git push origin HEAD~3:main
# Then push the remaining commits
git push origin main

Step 4: Optimize Your Local Repository #

You already ran git gc, but an aggressive cleanup can help streamline things:

git gc --aggressive --prune=now

Step 5: Check Your Network #

• Switch to a wired connection if you're on WiFi—wireless is far more prone to drops during large transfers.
• Disable any VPN or proxy temporarily, as these can interfere with SSL handshake and data transfer.

Final Notes #

Remember: all your work lives in your local repository, so even if pushes fail, nothing is lost. Work through these steps in order (fix the credential error first, then tackle the large pack issues) and you should be able to push successfully.

内容的提问来源于stack exchange，提问作者Rom-888