Rebase conflicts occur when Git tries to apply your commits onto a new base but finds overlapping changes. Unlike merge conflicts, you resolve conflicts for each commit individually.

Introduction

This article covers troubleshooting steps and solutions for Git Rebase Abort and Conflict Resolution Guide. The error typically occurs in production environments and can cause service disruptions if not addressed promptly.

Symptoms

During rebase:

bash
Executing: git rebase origin/main
CONFLICT (content): Merge conflict in src/app.js
error: could not apply abc123... Fix authentication bug
hint: Resolve all conflicts manually, mark them as resolved
hint: with "git add/rm <file>", then run "git rebase --continue".
hint: If you prefer to skip this patch, run "git rebase --skip" instead.
hint: To check out the original branch and abort the rebase,
hint: run "git rebase --abort".

Status shows:

``` interactive rebase in progress; onto def456 Last command done (1 command done): pick abc123 Fix authentication bug No commands remaining. You are currently rebasing branch 'feature' on 'def456'. (fix conflicts and then run "git rebase --continue") (use "git rebase --skip" to skip this patch) (use "git rebase --abort" to check out the original branch and abort the rebase)

Unmerged paths: (use "git add <file>..." to mark resolution) both modified: src/app.js ```

Common Causes

Rebase replays your commits one by one onto a new base. Each commit application is like a mini-merge. If the base changed in the same lines your commit modifies, Git pauses for resolution.

Common causes: - Your branch and main both modified the same code - Someone else fixed the same bug differently - Refactoring on main conflicts with your feature changes - Your commit is based on old code that no longer exists

Step-by-Step Fix

Check which commit caused conflict: ``bash git status

Shows the commit being applied.

See remaining commits: ``bash cat .git/rebase-merge/git-rebase-todo

Shows which commits are left to replay.

View the conflict: ``bash git diff --name-only --diff-filter=U

See what the incoming commit changes: ``bash git show HEAD

Compare with base: ``bash git diff def456..HEAD

Solution 1: Resolve Conflict and Continue

Edit conflicted files: ``bash nano src/app.js

Remove conflict markers and choose correct content.

Stage resolved files: ``bash git add src/app.js

Continue rebase: ``bash git rebase --continue

Git applies the resolved commit and moves to the next one. May encounter more conflicts.

Solution 2: Abort the Rebase

If conflicts are too complex or you want different approach:

bash
git rebase --abort

Returns to original state before rebase started. All your commits are preserved on original branch.

Solution 3: Skip the Conflicting Commit

If the commit is no longer needed (bug already fixed on main):

bash
git rebase --skip

Discards the current commit and moves to next. Use only when the change is truly redundant.

Solution 4: Take One Side Completely

For specific files, choose one version:

Keep your commit's version: ``bash git checkout --ours src/app.js git add src/app.js git rebase --continue

Keep the base's version: ``bash git checkout --theirs src/app.js git add src/app.js git rebase --continue

Note: During rebase, --ours is the base you're rebasing onto, --theirs is your commit being applied.

Solution 5: Edit Commit During Rebase

Change the commit content while resolving:

bash
# After resolving conflicts and staging
git commit --amend
# Edit message or content
git rebase --continue

Solution 6: Use Merge Tool

Launch visual merge tool:

bash
git mergetool

Configure your preferred tool:

bash
git config --global merge.tool vscode
git config --global mergetool.vscode.cmd 'code --wait $MERGED'

Solution 7: Restart Rebase Differently

Abort and restart with different strategy:

bash
git rebase --abort
git rebase -i origin/main

In interactive mode, you can: - Reorder commits - Squash commits together - Drop problematic commits - Edit commits before applying

Solution 8: Multiple Conflicts Sequentially

Rebase may hit conflicts on multiple commits:

```bash # Resolve first conflict git add src/app.js git rebase --continue

# Hit second conflict git add src/config.js git rebase --continue

# Hit third conflict git add src/utils.js git rebase --continue ```

Work through each one. If one is too difficult, abort and reconsider.

Solution 9: Rebase Onto Different Base

If current base is problematic:

bash
git rebase --abort
git rebase --onto def456 abc123 feature

Rebases onto def456, excluding commits before abc123.

Solution 10: Find Lost Commits After Abort

If you abort but can't find original state:

bash
git reflog

Look for state before rebase:

bash
abc123 HEAD@{0}: rebase (abort): updating HEAD
def456 HEAD@{1}: rebase (start): checkout def456
ghi789 HEAD@{2}: checkout: moving from main to feature

Reset to original:

bash
git reset --hard HEAD@{2}

Verification

Confirm rebase completed: ``bash git status

Should show: `` On branch feature nothing to commit, working tree clean

Check commit history: ``bash git log --oneline --graph -10

Your commits should appear on top of base.

Verify no conflict markers: ``bash git diff --check

No output means clean resolution.

Confirm file content: ``bash cat src/app.js

Should have your expected changes.

Test functionality: ``bash npm test make check

Ensure rebase didn't break anything.

Prevention Strategies

Update your branch frequently: ``bash git fetch origin git rebase origin/main

Regular rebasing reduces divergence.

Keep commits small and focused: Smaller commits have smaller conflict surfaces.

Use feature flags: Isolate new code to reduce conflicts with main.

Review before rebase: ``bash git log origin/main..HEAD --oneline git diff origin/main..HEAD --stat

Anticipate potential conflicts.

Rebase vs Merge for Conflicts

Rebase conflicts resolve each commit individually - tedious but cleaner history.

Merge conflicts resolve all at once - simpler but creates merge commit.

For complex conflicts, consider merge:

bash
git rebase --abort
git merge origin/main

Resolve all conflicts in one step.

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