private void walkLoop(long node) throws IOException {
          walker = new ConcurrentWalker(context);
          walker.setConf(conf);
          walker.run(node, wrap);
        }
Randomly selects and walks a random flushed loop concurrently with the Generator Mapper by
spawning ConcurrentWalker's with specified StartNodes. These ConcurrentWalker's are
configured to only log erroneous nodes.
hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestBigLinkedList.java