private void processAliases(String index, ObjectContainer<AliasMetaData> aliases, IndexAliasesService indexAliasesService) {
HashMap<String, IndexAlias> newAliases = newHashMap();
for (ObjectCursor<AliasMetaData> cursor : aliases) {
AliasMetaData aliasMd = cursor.value;
String alias = aliasMd.alias();
CompressedString filter = aliasMd.filter();
try {
if (!indexAliasesService.hasAlias(alias)) {
if (logger.isDebugEnabled()) {
logger.debug("[{}] adding alias [{}], filter [{}]", index, alias, filter);