Major Description
Observed this in one of recent hive + LLAP query run.
2017-05-15T17:19:52,852 INFO [TezTR-1509_2280_1_9_4_1 (1490656001509_2280_1_09_000004_1)] writers.UnorderedPartitionedKVWriter: Reducer_17: Moving to next buffer and triggering spill 2017-05-15T17:19:53,296 INFO [TezTR-1509_2280_1_9_4_1 (1490656001509_2280_1_09_000004_1)] writers.UnorderedPartitionedKVWriter: Reducer_17: Moving to next buffer and triggering spill 2017-05-15T17:19:54,409 INFO [TezTR-1509_2280_1_9_4_1 (1490656001509_2280_1_09_000004_1)] writers.UnorderedPartitionedKVWriter: Reducer_17: Moving to next buffer and triggering spill 2017-05-15T17:19:54,945 INFO [TezTR-1509_2280_1_9_4_1 (1490656001509_2280_1_09_000004_1)] writers.UnorderedPartitionedKVWriter: Reducer_17: Moving to next buffer and triggering spill 2017-05-15T17:19:55,802 INFO [TezTR-1509_2280_1_9_4_1 (1490656001509_2280_1_09_000004_1)] writers.UnorderedPartitionedKVWriter: Reducer_17: Moving to next buffer and triggering spill 2017-05-15T17:19:56,235 INFO [TezTR-1509_2280_1_9_4_1 (1490656001509_2280_1_09_000004_1)] writers.UnorderedPartitionedKVWriter: Reducer_17: Moving to next buffer and triggering spill 2017-05-15T17:19:57,056 INFO [TezTR-1509_2280_1_9_4_1 (1490656001509_2280_1_09_000004_1)] writers.UnorderedPartitionedKVWriter: Reducer_17: Moving to next buffer and triggering spill 2017-05-15T17:19:57,650 INFO [TezTR-1509_2280_1_9_4_1 (1490656001509_2280_1_09_000004_1)] writers.UnorderedPartitionedKVWriter: Reducer_17: Moving to next buffer and triggering spill
This log line doesn't convey much info. Should lower the level to DEBUG or TRACE or remove it altogether.