code: public void testIncrementColumnValue_ConcurrentFlush() throws IOException {
    initHRegion(tableName,getName(),fam1);
    long value=1L;
    long amount=3L;
    Put put=new Put(row);
    put.add(fam1,qual1,Bytes.toBytes(value));
    region.put(put);
    Thread t=new Thread(){
      public void run(){
        try {
          region.flushcache();
        }
   catch (      IOException e) {
          LOG.info("test ICV, got IOE during flushcache()");
        }
      }
    }
  ;
    t.start();
    long r=region.incrementColumnValue(row,fam1,qual1,amount,true);
    assertEquals(value + amount,r);
    assertICV(row,fam1,qual1,value + amount);
  }
  