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Posted to issues-all@impala.apache.org by "Riza Suminto (Jira)" <ji...@apache.org> on 2021/03/15 03:51:00 UTC
[jira] [Resolved] (IMPALA-10565) Validate
max_spilled_result_spooling_mem against scratch_limit
[ https://issues.apache.org/jira/browse/IMPALA-10565?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Riza Suminto resolved IMPALA-10565.
-----------------------------------
Fix Version/s: Impala 4.0
Resolution: Fixed
> Validate max_spilled_result_spooling_mem against scratch_limit
> --------------------------------------------------------------
>
> Key: IMPALA-10565
> URL: https://issues.apache.org/jira/browse/IMPALA-10565
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 4.0
> Reporter: Riza Suminto
> Assignee: Riza Suminto
> Priority: Major
> Fix For: Impala 4.0
>
>
> IMPALA-9856 enable result spooling by default. However, if query option scratch_limit is set lower than the default max_spilled_result_spooling_mem, the query might fail in the middle of execution due to insufficient scratch space.
> This is shown in intermittent failure of TestScratchLimit::test_with_zero_scratch_limit_no_memory_limit:
> {code:java}
> E ImpalaBeeswaxException: ImpalaBeeswaxException:
> E INNER EXCEPTION: <class 'beeswaxd.ttypes.BeeswaxException'>
> E MESSAGE: Memory limit exceeded: Could not free memory by spilling to disk: scratch_limit is 0
> E Error occurred on backend impala-ec2-centos74-m5-4xlarge-ondemand-1827.vpc.cloudera.com:27000 by fragment 6f44a34948c173dd:a1a63d8000000000
> E Memory left in process limit: 8.69 GB
> E Query(6f44a34948c173dd:a1a63d8000000000): Reservation=100.00 MB ReservationLimit=9.60 GB OtherMemory=14.25 MB Total=114.25 MB Peak=114.25 MB
> E Fragment 6f44a34948c173dd:a1a63d8000000000: Reservation=100.00 MB OtherMemory=14.25 MB Total=114.25 MB Peak=114.25 MB
> E EXCHANGE_NODE (id=2): Reservation=14.23 MB OtherMemory=0 Total=14.23 MB Peak=14.32 MB
> E KrpcDeferredRpcs: Total=0 Peak=90.53 KB
> E PLAN_ROOT_SINK: Reservation=100.00 MB ReservationLimit=100.00 MB OtherMemory=8.00 KB Total=100.01 MB Peak=100.01 MB
> E CodeGen: Total=263.00 B Peak=387.00 KB{code}
> Before the query run, we need to validate that max_spilled_result_spooling_mem <= scratch_limit.
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