@Test
  public void testRetriesExhaustedBatchSize() throws Exception {
    runDropPartitions(17, 30, 0, allException);
  }
Tests the retries exhausted case when Hive.DropPartitions method call always keep throwing
MetaException. The batch sizes should exponentially decreased based on the decaying factor and
ultimately give up when it reaches 0.

@throws Exception
ql/src/test/org/apache/hadoop/hive/ql/exec/TestMsckDropPartitionsInBatches.java