{"record":{"id":"364a381c42361980","repo":"appsmithorg/appsmith","slug":"error-while-rebasing-the-branch","errorCode":null,"errorMessage":"Error while rebasing the branch, {}","messagePattern":"Error while rebasing the branch, (.+?)","errorType":"exception","errorClass":"Exception","httpStatus":null,"severity":"error","filePath":"app/server/appsmith-git/src/main/java/com/appsmith/git/handler/ce/FSGitHandlerCEImpl.java","lineNumber":1733,"sourceCode":"                                git -> Mono.fromCallable(() -> {\n                                            Span jgitRebaseSpan = observationHelper.createSpan(GitSpan.JGIT_REBASE);\n                                            RebaseResult result = git.rebase()\n                                                    .setUpstream(\"origin/\" + branchName)\n                                                    .call();\n                                            if (result.getStatus().isSuccessful()) {\n                                                jgitRebaseSpan.end();\n                                                return true;\n                                            } else {\n                                                log.error(\n                                                        \"Error while rebasing the branch, {}, {}\",\n                                                        result.getStatus().name(),\n                                                        result.getConflicts());\n                                                git.rebase()\n                                                        .setUpstream(\"origin/\" + branchName)\n                                                        .setOperation(RebaseCommand.Operation.ABORT)\n                                                        .call();\n                                                jgitRebaseSpan.end();\n                                                throw new Exception(\"Error while rebasing the branch, \"\n                                                        + result.getStatus().name());\n                                            }\n                                        })\n                                        .onErrorMap(e -> {\n                                            log.error(\"Error while rebasing the branch, {}\", e.getMessage());\n                                            return e;\n                                        })\n                                        .timeout(Duration.ofMillis(Constraint.TIMEOUT_MILLIS))\n                                        .name(GitSpan.FS_REBASE)\n                                        .tap(Micrometer.observation(observationRegistry)),\n                                Git::close)\n                        .subscribeOn(scheduler));\n    }\n\n    @Override\n    public Mono<BranchTrackingStatus> getBranchTrackingStatus(Path repoSuffix, String branchName) {\n        return Mono.using(\n                        () -> Git.open(createRepoPath(repoSuffix).toFile()),","sourceCodeStart":1715,"sourceCodeEnd":1751,"githubUrl":"https://github.com/appsmithorg/appsmith/blob/8cd9021c24cdbea1c3c12c966073708e83db60c2/app/server/appsmith-git/src/main/java/com/appsmith/git/handler/ce/FSGitHandlerCEImpl.java#L1715-L1751","documentation":"Thrown by FSGitHandlerCEImpl.rebaseBranch when JGit's RebaseCommand.call() returns a result whose status is not successful (e.g. CONFLICTS, FAILED, ABORTED, STOPPED). The handler logs the status and conflict list, runs an ABORT operation on the rebase to leave the working tree clean, ends the observation span, then throws a generic Exception carrying the status name. The reactive chain additionally onErrorMaps it for logging and applies a timeout. It is the terminal signal for a git rebase that could not be completed cleanly against origin/<branchName>.","triggerScenarios":"Calling rebaseBranch(repoSuffix, branchName, keepWorkingDirChanges) where the local branch has commits that conflict with origin/<branchName>, where the index is in an unexpected state after resetToLastCommit, where the working directory contains untracked files that collide with rebase targets, or when a concurrent git operation on the same repository mutates state during the rebase. Also triggered if the JGit library cannot resolve the upstream ref origin/<branchName>.","commonSituations":"Two users editing the same application on the same git branch and one pulls/rebases; an auto-commit triggered by Appsmith colliding with a remote commit; a stale local checkout that diverged significantly; disk full or filesystem permission errors causing JGit to fail mid-rebase; timeouts exceeding Constraint.TIMEOUT_MILLIS during large rebases.","solutions":["Inspect server logs for the line 'Error while rebasing the branch, {status}, {conflicts}' printed just before the throw - it names the RebaseResult.Status and the conflicting file paths.","From the Appsmith git UI, discard local changes (reset hard) on the affected branch and retry the pull/rebase so the branch matches origin exactly.","If a specific file conflict recurs, manually resolve it in a local clone, push to origin, then re-trigger the Appsmith sync.","Confirm the remote ref origin/<branchName> exists (git ls-remote origin) and that the configured default branch matches.","If this happens reproducibly on a large repo, raise Constraint.TIMEOUT_MILLIS or reduce the number of pending commits before rebasing."],"exampleFix":"// before\nreturn this.resetToLastCommit(repoSuffix, branchName, keepWorkingDirChanges)\n    .flatMap(isCheckedOut -> Mono.using(... rebase ...));\n\n// after - surface the RebaseResult so callers can recover instead of throwing blindly\nif (!result.getStatus().isSuccessful()) {\n    log.error(\"Rebase failed: status={}, conflicts={}\",\n        result.getStatus().name(), result.getConflicts());\n    git.rebase().setUpstream(\"origin/\" + branchName)\n        .setOperation(RebaseCommand.Operation.ABORT).call();\n    jgitRebaseSpan.end();\n    throw new AppsmithPluginException(\n        AppsmithPluginError.GIT_ACTION_FAILED,\n        \"Rebase failed with status \" + result.getStatus().name()\n        + \"; conflicts: \" + result.getConflicts());\n}","handlingStrategy":"try-catch","validationCode":"// Before invoking rebaseBranch, confirm the branch is in a rebaseable state\nPath repo = createRepoPath(repoSuffix);\ntry (Git git = Git.open(repo.toFile())) {\n    Repository repository = git.getRepository();\n    BranchTrackingStatus status = BranchTrackingStatus.of(repository, branchName);\n    if (status == null || status.getAheadCount() == 0) {\n        // nothing to rebase; skip the call\n        return Mono.just(true);\n    }\n    // ensure upstream ref resolves\n    if (repository.findRef(\"origin/\" + branchName) == null) {\n        return Mono.error(new IllegalStateException(\"Upstream ref origin/\" + branchName + \" missing\"));\n    }\n} catch (IOException e) {\n    return Mono.error(e);\n}","typeGuard":null,"tryCatchPattern":"// rebaseBranch returns Mono<Boolean> - handle the terminal error in the reactive chain\nrebaseBranch(repoSuffix, branchName, false)\n    .onErrorResume(e -> {\n        log.error(\"Rebase failed for branch {}, attempting hard reset fallback\", branchName, e);\n        return resetHard(repoSuffix, branchName).then(Mono.just(false));\n    });","preventionTips":["Always reset to the latest remote before rebasing to minimize divergence.","Avoid concurrent git operations on the same repository path.","Surface RebaseResult.getStatus() to callers so they can choose a recovery strategy."],"tags":["git","rebase","jgit","appsmith-git","reactive"],"backgroundTag":null,"analyzedSha":"8cd9021c24cdbea1c3c12c966073708e83db60c2","analyzedAt":"2026-08-12T22:14:19.293Z","schemaVersion":2},"datasetVersion":"2026-08-12T23:17:12.415Z"}