#vulnerable code 
                                @Override
    public final void initialize(Resource resource, final ValueMap params) throws
            PersistenceException, RepositoryException {
        final ModifiableValueMap properties = resource.adaptTo(ModifiableValueMap.class);

        if (properties.get(KEY_INITIALIZED, false)) {
            log.warn("Refusing to re-initialize an already initialized Bulk Workflow Manager.");
            return;
        }

        properties.putAll(params);
        properties.put(KEY_JOB_NAME, resource.getPath());

        // Query for all candidate resources

        final ResourceResolver resourceResolver = resource.getResourceResolver();
        final Session session = resourceResolver.adaptTo(Session.class);
        final QueryManager queryManager = session.getWorkspace().getQueryManager();
        final QueryResult queryResult = queryManager.createQuery(properties.get(KEY_QUERY, ""),
                Query.JCR_SQL2).execute();
        final NodeIterator nodes = queryResult.getNodes();

        long size = queryResult.getNodes().getSize();
        if (size < 0) {
            log.debug("Using provided estimate total size [ {} ] as actual size [ {} ] could not be retrieved.",
                    properties.get(KEY_ESTIMATED_TOTAL, DEFAULT_ESTIMATED_TOTAL), size);
            size = properties.get(KEY_ESTIMATED_TOTAL, DEFAULT_ESTIMATED_TOTAL);
        }

        final int batchSize = properties.get(KEY_BATCH_SIZE, DEFAULT_BATCH_SIZE);
        final Bucket bucket = new Bucket(batchSize, size,
                resource.getChild(NN_BATCHES).getPath(), "sling:Folder");

        // Create the structure
        String currentBatch = null;
        int total = 0;
        Node previousBatchNode = null, node = null;
        while (nodes.hasNext()) {

            final String batchPath = bucket.getNextPath(resourceResolver);

            if (currentBatch == null) {
                // Set the currentBatch to the first batch folder
                currentBatch = batchPath;
            }

            final String batchItemPath = batchPath + "/" + total++;
            node = JcrUtil.createPath(batchItemPath, SLING_FOLDER, JcrConstants.NT_UNSTRUCTURED, session, false);

            JcrUtil.setProperty(node, KEY_PATH, nodes.nextNode().getPath());

            if (total % batchSize == 0) {
                previousBatchNode = node.getParent();
            } else if ((total % batchSize == 1) && previousBatchNode != null) {
                // Set the "next batch" property, so we know what the next batch to process is when
                // the current batch is complete
                JcrUtil.setProperty(previousBatchNode, KEY_NEXT_BATCH, node.getParent().getPath());
            }

            if (total % SAVE_THRESHOLD == 0) {
                session.save();
            }
        }

        // Set last batch's "next batch" property to complete so we know we're done
        JcrUtil.setProperty(node.getParent(), KEY_NEXT_BATCH, STATE_COMPLETE);

        if (total % SAVE_THRESHOLD != 0) {
            session.save();
        }

        properties.put(KEY_CURRENT_BATCH, currentBatch);
        properties.put(KEY_TOTAL, total);
        properties.put(KEY_INITIALIZED, true);
        properties.put(KEY_STATE, STATE_NOT_STARTED);

        resource.getResourceResolver().commit();
    } 
                            #location 66 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Override
    public final void initialize(Resource resource, final ValueMap params) throws
            PersistenceException, RepositoryException {
        final ModifiableValueMap properties = resource.adaptTo(ModifiableValueMap.class);

        log.trace("Entering initialized");

        if (properties.get(KEY_INITIALIZED, false)) {
            log.warn("Refusing to re-initialize an already initialized Bulk Workflow Manager.");
            return;
        }

        properties.putAll(params);
        properties.put(KEY_JOB_NAME, resource.getPath());

        // Query for all candidate resources

        final ResourceResolver resourceResolver = resource.getResourceResolver();
        final Session session = resourceResolver.adaptTo(Session.class);
        final QueryManager queryManager = session.getWorkspace().getQueryManager();
        final QueryResult queryResult = queryManager.createQuery(properties.get(KEY_QUERY, ""),
                Query.JCR_SQL2).execute();
        final NodeIterator nodes = queryResult.getNodes();

        long size = nodes.getSize();
        if (size < 0) {
            log.debug("Using provided estimate total size [ {} ] as actual size [ {} ] could not be retrieved.",
                    properties.get(KEY_ESTIMATED_TOTAL, DEFAULT_ESTIMATED_TOTAL), size);
            size = properties.get(KEY_ESTIMATED_TOTAL, DEFAULT_ESTIMATED_TOTAL);
        }

        final int batchSize = properties.get(KEY_BATCH_SIZE, DEFAULT_BATCH_SIZE);
        final Bucket bucket = new Bucket(batchSize, size,
                resource.getChild(NN_BATCHES).getPath(), "sling:Folder");

        final String relPath = params.get(KEY_RELATIVE_PATH, "");

        // Create the structure
        String currentBatch = null;
        int total = 0;
        Node previousBatchNode = null, batchItemNode = null;
        while (nodes.hasNext()) {
            Node payloadNode = nodes.nextNode();
            log.debug("nodes has next: {}", nodes.hasNext());

            log.trace("Processing search result [ {} ]", payloadNode.getPath());

            if(StringUtils.isNotBlank(relPath)) {
                if(payloadNode.hasNode(relPath)) {
                    payloadNode = payloadNode.getNode(relPath);
                } else {
                    log.warn("Could not find node at [ {} ]", payloadNode.getPath() + "/" + relPath);
                    continue;
                }
                // No rel path, so use the Query result node as the payload Node
            }

            total++;
            final String batchPath = bucket.getNextPath(resourceResolver);

            if (currentBatch == null) {
                // Set the currentBatch to the first batch folder
                currentBatch = batchPath;
            }

            final String batchItemPath = batchPath + "/" + total;

            batchItemNode = JcrUtil.createPath(batchItemPath, SLING_FOLDER, JcrConstants.NT_UNSTRUCTURED, session,
                    false);

            log.trace("Created batch item path at [ {} ]", batchItemPath);

            JcrUtil.setProperty(batchItemNode, KEY_PATH, payloadNode.getPath());
            log.trace("Added payload [ {} ] for batch item [ {} ]", payloadNode.getPath(), batchItemNode.getPath());

            if (total % batchSize == 0) {
                previousBatchNode = batchItemNode.getParent();
            } else if ((total % batchSize == 1) && previousBatchNode != null) {
                // Set the "next batch" property, so we know what the next batch to process is when
                // the current batch is complete
                JcrUtil.setProperty(previousBatchNode, KEY_NEXT_BATCH, batchItemNode.getParent().getPath());
            }

            if (total % SAVE_THRESHOLD == 0) {
                session.save();
            }
        } // while

        if(total > 0) {
            // Set last batch's "next batch" property to complete so we know we're done
            JcrUtil.setProperty(batchItemNode.getParent(), KEY_NEXT_BATCH, STATE_COMPLETE);

            if (total % SAVE_THRESHOLD != 0) {
                session.save();
            }

            properties.put(KEY_CURRENT_BATCH, currentBatch);
            properties.put(KEY_TOTAL, total);
            properties.put(KEY_INITIALIZED, true);
            properties.put(KEY_STATE, STATE_NOT_STARTED);

            resource.getResourceResolver().commit();

            log.info("Completed initialization of Bulk Workflow Manager");
        } else {
            throw new IllegalArgumentException("Query returned zero results.");
        }
    }