@Override
      protected void bulkLoadPhase(AsyncClusterConnection conn, TableName tableName,
        Deque<LoadQueueItem> queue, Multimap<ByteBuffer, LoadQueueItem> regionGroups,
        boolean copyFiles, Map<LoadQueueItem, ByteBuffer> item2RegionMap) throws IOException {
        AsyncClusterConnection c =
          attemptedCalls.incrementAndGet() == 1 ? mockAndInjectError(conn) : conn;
        super.bulkLoadPhase(c, tableName, queue, regionGroups, copyFiles, item2RegionMap);
      }
Test that shows that exception thrown from the RS side will result in an exception on the
LIHFile client.
hbase-server/src/test/java/org/apache/hadoop/hbase/tool/TestBulkLoadHFilesSplitRecovery.java