[IMPALA-1131] "Total" time counter does not capture all the network transmit time

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 1.3
• Fix Version/s: Impala 1.4.1
• Assignee: Nong Li
• Reporter: Alan Choi
• Created: 02/Aug/14 00:19
• Updated: 18/Aug/14 00:31
• Resolved: 18/Aug/14 00:31

Description

In PlanFragmentExecutor::OpenInternal(), the time spent in sink_->Close(runtime_state()) was not captured by the total_time_counter().

Because the Send() is async, by the time we call Close(), the data might not have sent thought yet and we might spent a considerable amount of time on Close().

This bug makes it quite difficult to diagnose network related query performance.