@Override
    public int compareTo(AllocRecord e) {
      if (alloc != e.alloc) {
        throw new RuntimeException("Can only compare within a particular array");
      }
      return Ints.compare(this.offset, e.offset);
    }
After mslab close, jumboChunk is removed from {@link ChunkCreator#chunkIdMap} but because
dataChunk is recycled to pool so it is still in {@link ChunkCreator#chunkIdMap}.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMemStoreLAB.java