Null value from resource resolver

I am getting null resourcefrom the resource resolver. Here is the function I am calling, when I debugged I found path and resourseResolver is not null.

when I am at Resource resource = resourceResolver.getResource(path); I am getting resource as null. Attaching screenshot from eclipse

    private Asset getDamAssets(String path, ResourceResolver resourceResolver)
            throws RepositoryException {
        Asset asset = null;
        LOG.info("...getDamAssets at " + path);
        Resource resource = resourceResolver.getResource(path);

        if (resource != null) {
            // Convert resource to asset, returns null if not an asset
            asset = resource.adaptTo(Asset.class);
        }

        return asset;
    }