query_test.test_tpch_queries.TestTpchQuery.test_tpch failed with "Memory limit Exceeded."

E   ImpalaBeeswaxException: ImpalaBeeswaxException:
E    Query aborted:Memory limit exceeded: Cannot perform aggregation at aggregator with id 4. Failed to allocate 25 bytes for intermediate tuple.
E   Fragment 85444bc502604143:43739df80000000b could not allocate 25.00 B without exceeding limit.
E   Error occurred on backend e6a3e789bfca:22000 by fragment 85444bc502604143:43739df80000000b
E   Memory left in process limit: 6.82 GB
E   Memory left in query limit: 10.48 KB 

E     Fragment 85444bc502604143:43739df80000000b: Reservation=42.00 MB OtherMemory=1.64 MB Total=43.64 MB Peak=43.70 MB
E       AGGREGATION_NODE (id=4): Reservation=42.00 MB OtherMemory=42.12 KB Total=42.04 MB Peak=42.04 MB
E         GroupingAggregator 0: Reservation=42.00 MB OtherMemory=17.12 KB Total=42.02 MB Peak=42.02 MB
E           Exprs: Total=17.12 KB Peak=17.12 KB
E       KUDU_SCAN_NODE (id=3): Total=1.49 MB Peak=1.51 MB
E         Queued Batches: Total=1.49 MB Peak=1.51 MB
E       KrpcDataStreamSender (dst_id=13): Total=83.35 KB Peak=99.35 KB
E       CodeGen: Total=5.29 KB Peak=596.50 KB