code: private void updateIndexName() {
          this.logIndexName = this.logIndexPrefix + "_" + SIMPLE_DATE_FORMAT.format(new Date());
  
          try {
              addIndex(logIndexName);
          } catch (IOException e) {
              logger.error("Failed to update log index name: {}", logIndexName, e);
          }
      }
docs: Roll the tasklog index daily.