[Demonstration 1]

[Buggy Method]
public void setOption(OptionDto dto) {
    final boolean isSizeChange = dto.getMaximumDocumentMBSize() != globalAppData.getMaximumDocumentMBSize();
    if (dto.getLimitCountOfResult() > 0)
        globalAppData.setLimitCountOfResult(dto.getLimitCountOfResult());
    if (dto.getMaximumDocumentMBSize() > 0)
        globalAppData.setMaximumDocumentMBSize(dto.getMaximumDocumentMBSize());
    globalAppData.setKeywordMode(dto.getKeywordMode());
    EnumSet<TARGET_MODE> targetMode = EnumSet.noneOf(TARGET_MODE.class);
    if (dto.isPathTarget())
        targetMode.add(TARGET_MODE.PATH);
    if (dto.isContentTarget())
        targetMode.add(TARGET_MODE.CONTENT);
    globalAppData.setTargetMode(targetMode);
    globalAppData.writeAppDataToDisk();
    if (isSizeChange) {
        CompletableFuture<Boolean> f = handler.restartIndexAsync();
        f.exceptionally((exception) -> {
            LOG.error("To update indexes failed " + ExceptionUtils.getStackTrace(exception));
            return true;
        });
    }
    //indexActor.tell(new Restart(), null);
}

[Buggy Hunk]
CompletableFuture<Boolean> f = handler.restartIndexAsync();

[Patch]
CompletableFuture<Boolean> f = handler.restartIndexAsync(globalAppData.getDirectoryList());

[Demonstration 2]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));

[Demonstration 3]

[Buggy Method]
private CompletableFuture<HarborRemote> connectToRemote(String key, String namespace, String node, String name) {
    CompletableFuture<HarborRemote> future = new CompletableFuture<>();
    CompletableFuture<NodeURL> findFuture = discoveryService.find(NodeURL.getFullPath(namespace, node, name));
    findFuture.whenCompleteAsync((nodeUrl, err) -> {
        if (err != null) {
            future.completeExceptionally(err);
            return;
        }
        try {
            HarborRemote remote = null;
            synchronized (remoteHarborMap) {
                remote = remoteHarborMap.get(key);
                if (remote == null) {
                    LoadBalance loadBalance = null;
                    if (nodeUrl.getLoadBalanceStrategy() != LoadBalanceStrategy.None) {
                        loadBalanceFactory.create(discoveryService, nodeUrl.getLoadBalanceStrategy());
                    }
                    remote = new HarborRemote(loadBalance, nodeUrl, executor).connect();
                    remoteHarborMap.put(key, remote);
                }
            }
            future.complete(remote);
        } catch (Throwable e) {
            logger.error("HarborRemote Create Error!", e);
            future.completeExceptionally(e);
        }
    }, executor);
    return future;
}

[Buggy Hunk]
loadBalanceFactory.create(discoveryService, nodeUrl.getLoadBalanceStrategy());

[Patch]
loadBalance = loadBalanceFactory.create(discoveryService, nodeUrl.getLoadBalanceStrategy());