Zoltán Borók-Nagy created IMPALA-14840:
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Summary: Pool can use more memory than Max Memory when Min/Max
Query Memory limit is not set
Key: IMPALA-14840
URL: https://issues.apache.org/jira/browse/IMPALA-14840
Project: IMPALA
Issue Type: Bug
Components: Backend
Reporter: Zoltán Borók-Nagy
Based on the following comments a query can use unlimited resources if
* Pool has no Min and Max Query Memory LImit
* Query option MEM_LIMIT is not set
https://github.com/apache/impala/blob/787b63a4b88b91bf441200e336ca0bac873541b9/be/src/scheduling/schedule-state.cc#L301-L303
{noformat}
// If the min_query_mem_limit and max_query_mem_limit are not set in the pool
config
// then it falls back to traditional(old) behavior, which means that, it sets
the
// mem_limit if it is set in the query options, else sets it to -1 (no limit).
{noformat}
https://github.com/apache/impala/blob/787b63a4b88b91bf441200e336ca0bac873541b9/be/src/scheduling/schedule-state.cc#L411
This can lead to using more memory than the "Max Memory" specified for the pool.
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