// Let connection pooling handle cleanup - this improves performance
                // for scenarios where the same file or directory is accessed multiple times
                log.trace("Tree handle released to connection pool for reuse");
                // The connection pool will handle cleanup based on its own timeout settings
            }
        }

        // Clear attribute cache only if we're doing strict cleanup

        final Number primaryTerm = (Number) source.remove(fessConfig.getIndexFieldPrimaryTerm());
        IndexResponse response;
        try {
            if (id == null) {
                // TODO throw Exception in next release
                // create
                response = client.prepareIndex()
                        .setIndex(index)
                        .setSource(new DocMap(source))