private static void putToTable(Table table, byte[] rowkey) throws IOException {
    Put put = new Put(rowkey);
    put.addColumn(CF, CQ, VALUE);
    table.put(put);
  }
Use {@link DeallocateRewriteByteBuffAllocator} to rewrite the bytebuffers right after
released.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerScan.java