Affects Version/s: Impala 2.3.0
Fix Version/s: None
Environment:impalad version 2.3.0-cdh5-INTERNAL DEBUG (build 67eb28b2ea414cda8675c0f890fb5a2709744e5e)
Built on Sun, 13 Sep 2015 22:53:40 PST
In a stress test run, 1 out of 10k queries was hung seemingly trying to process a cancellation request.
The coordinator log shows that the cancelation request was received:
Here is what a successful cancelation looks like
So "CloseOperation()" never happens.
The client log shows that the server never responds to the cancelation request. The client is still waiting for a response.
The client code is
The client log never shows a "Sent cancellation..." message or any network error.
The query/plan is
The logs don't show any query errors.