[IMPALA-11860] Query failure due to large buffer allocation provides insufficient context

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 4.2.0
• Fix Version/s: Impala 4.3.0
• Component/s: Backend
• Epic Color: ghx-label-6
• Assignee: Michael Smith
• Reporter: Michael Smith
• Created: 24/Jan/23 17:20
• Updated: 25/Jan/23 23:49
• Resolved: 25/Jan/23 23:48

Description

When a query fails because SerializeToBuffer returns a "not OK" status in https://github.com/apache/impala/blob/4.2.0/be/src/runtime/query-state.cc#L646-L655, profile_len is always 0.

Usually if SerializeToBuffer returns "not OK" it's because it failed to allocate more buffer space, and often has already allocated some buffer. It would help to know how much buffer is allocated, so SerializeToBuffer should update profile_len before returning an error.

Issue Links

• is related to: IMPALA-11200 Redundant additions to ExecOption field in query profile of grouping aggregator node when inside a subplan