[IMPALA-7727] failed compute stats child query status no longer propagates to parent query

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Impala 3.1.0
• Fix Version/s: Impala 3.1.0
• Component/s: Frontend
• Labels: regression stress
• Target Version: Impala 3.1.0
• Epic Color: ghx-label-6
• Assignee: Bharath Vissapragada
• Reporter: Michael Brown
• Created: 18/Oct/18 22:40
• Updated: 30/Oct/18 21:19
• Resolved: 30/Oct/18 21:19

Description

bharathv since you have been dealing with stats, please take a look. Otherwise feel free to reassign. This bug prevents the stress test from running with compute stats statements. It triggers in non-stressful conditions, too.

$ impala-shell.sh -d tpch_parquet
[localhost:21000] tpch_parquet> set mem_limit=24m;
MEM_LIMIT set to 24m
[localhost:21000] tpch_parquet> compute stats customer;
Query: compute stats customer
WARNINGS: Cancelled


[localhost:21000] tpch_parquet>

The problem is that the child query didn't have enough memory to run, but this error didn't propagate up.

Query (id=384d37fb2826a962:f4b1035700000000):
  DEBUG MODE WARNING: Query profile created while running a DEBUG build of Impala. Use RELEASE builds to measure query performance.
  Summary:
    Session ID: d343e1026d497bb0:7e87b342c73c108d
    Session Type: BEESWAX
    Start Time: 2018-10-18 15:16:34.036363000
    End Time: 2018-10-18 15:16:34.177711000
    Query Type: QUERY
    Query State: EXCEPTION
    Query Status: Rejected query from pool default-pool: minimum memory reservation is greater than memory available to the query for buffer reservations. Memory reservation needed given the current plan: 128.00 KB. Adjust either the mem_limit or the pool config (max-query-mem-limit, min-query-mem-limit) for the query to allow the query memory limit to be at least 32.12 MB. Note that changing the mem_limit may also change the plan. See the query profile for more information about the per-node memory requirements.
    Impala Version: impalad version 3.1.0-SNAPSHOT DEBUG (build 9f5c5e6df03824cba292fe5a619153462c11669c)
    User: mikeb
    Connected User: mikeb
    Delegated User: 
    Network Address: ::ffff:127.0.0.1:46458
    Default Db: tpch_parquet
    Sql Statement: SELECT COUNT(*) FROM customer
    Coordinator: mikeb-ub162:22000
    Query Options (set by configuration): MEM_LIMIT=25165824,MT_DOP=4
    Query Options (set by configuration and planner): MEM_LIMIT=25165824,NUM_SCANNER_THREADS=1,MT_DOP=4
    Plan: 
----------------
Max Per-Host Resource Reservation: Memory=512.00KB Threads=5
Per-Host Resource Estimates: Memory=146MB

F01:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1
|  Per-Host Resources: mem-estimate=10.00MB mem-reservation=0B thread-reservation=1
PLAN-ROOT SINK
|  mem-estimate=0B mem-reservation=0B thread-reservation=0
|
03:AGGREGATE [FINALIZE]
|  output: count:merge(*)
|  mem-estimate=10.00MB mem-reservation=0B spill-buffer=2.00MB thread-reservation=0
|  tuple-ids=1 row-size=8B cardinality=1
|  in pipelines: 03(GETNEXT), 01(OPEN)
|
02:EXCHANGE [UNPARTITIONED]
|  mem-estimate=0B mem-reservation=0B thread-reservation=0
|  tuple-ids=1 row-size=8B cardinality=1
|  in pipelines: 01(GETNEXT)
|
F00:PLAN FRAGMENT [RANDOM] hosts=1 instances=4
Per-Host Resources: mem-estimate=136.00MB mem-reservation=512.00KB thread-reservation=4
01:AGGREGATE
|  output: sum_init_zero(tpch_parquet.customer.parquet-stats: num_rows)
|  mem-estimate=10.00MB mem-reservation=0B spill-buffer=2.00MB thread-reservation=0
|  tuple-ids=1 row-size=8B cardinality=1
|  in pipelines: 01(GETNEXT), 00(OPEN)
|
00:SCAN HDFS [tpch_parquet.customer, RANDOM]
   partitions=1/1 files=1 size=12.34MB
   stored statistics:
     table: rows=150000 size=12.34MB
     columns: all
   extrapolated-rows=disabled max-scan-range-rows=150000
   mem-estimate=24.00MB mem-reservation=128.00KB thread-reservation=0
   tuple-ids=0 row-size=8B cardinality=150000
   in pipelines: 00(GETNEXT)
----------------
    Estimated Per-Host Mem: 153092096
    Per Host Min Memory Reservation: mikeb-ub162:22000(0) mikeb-ub162:22001(128.00 KB)
    Request Pool: default-pool
    Admission result: Rejected
    Query Compilation: 126.903ms
       - Metadata of all 1 tables cached: 5.484ms (5.484ms)
       - Analysis finished: 16.104ms (10.619ms)
       - Value transfer graph computed: 32.646ms (16.542ms)
       - Single node plan created: 61.289ms (28.642ms)
       - Runtime filters computed: 66.148ms (4.859ms)
       - Distributed plan created: 66.428ms (280.057us)
       - Parallel plans created: 67.866ms (1.437ms)
       - Planning finished: 126.903ms (59.037ms)
    Query Timeline: 140.000ms
       - Query submitted: 0.000ns (0.000ns)
       - Planning finished: 140.000ms (140.000ms)
       - Submit for admission: 140.000ms (0.000ns)
       - Completed admission: 140.000ms (0.000ns)
       - Rows available: 140.000ms (0.000ns)
       - Unregister query: 140.000ms (0.000ns)
     - ComputeScanRangeAssignmentTimer: 0.000ns
    Frontend:
  ImpalaServer:
     - ClientFetchWaitTimer: 0.000ns
     - RowMaterializationTimer: 0.000ns

Issue Links

• is broken by: IMPALA-7420 Alternative cancellation messages with "internal" cancellation