code: public StripeInfo retrieveStripe(Block lostBlock, Path p,
        long lostBlockOffset, FileSystem fs, Context context,
        boolean online)
            throws IOException {
      StripeInfo si = null;
      if (stripeStore != null) { 
        IOException caughtException = null;
        try {
          si = stripeStore.getStripe(codec, lostBlock);
        } catch (IOException ioe) {
          LOG.error(" Fail to get stripe " + codec 
              + " : " + lostBlock, ioe);
          caughtException = ioe;
        }
        if (si == null) {  
          // Stripe is not record, we should report  
          LogUtils.logRaidReconstructionMetrics(LOGRESULTS.FAILURE, 0,
              codec, p, lostBlockOffset,
              online? LOGTYPES.ONLINE_RECONSTRUCTION_GET_STRIPE: 
              LOGTYPES.OFFLINE_RECONSTRUCTION_GET_STRIPE,
              fs, caughtException, context); 
        }
      }
      return si;
    }
docs: Retrieve stripes from stripe store