code: synchronized boolean hasUnfinalizedSegments(long fromTxId) {
      List<EditLogInputStream> streams = new ArrayList<EditLogInputStream>();
      for (JournalAndStream jas : journals) {
        if (jas.isDisabled()) {
          continue;
        }
        try {
          // get all streams, including inProgress ones.
          jas.getManager().selectInputStreams(streams, fromTxId, true, false);
          for (EditLogInputStream elis : streams) {
            if (elis.isInProgress()) {
              // we found an input stream that is in progress
              return true;
            }
          }
        } catch (IOException ioe) {
          LOG.warn("Unable to determine input streams from " + jas.getManager()
              + ". Skipping.", ioe);
        }
      }
      // all streams are finalized
      return false;
    }
docs: Check if any journal manager has unfinalized segments.
  @param fromTxId starting txid