if(isDotCMSIndexName(idx))
indexNames.add(idx);
List<String> existingIndex=new ArrayList<String>();
for(String idx : indexNames)
if(client.admin().indices().exists(new IndicesExistsRequest(idx)).actionGet().isExists())
existingIndex.add(idx);
indexNames=existingIndex;
List<String> indexes = new ArrayList<String>();
indexes.addAll(indexNames);