[IMPALA-7133] Beeswax methods return Default TException instead of real exception

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: Impala 2.13.0, Impala 3.1.0
• Labels: usability
• Epic Color: ghx-label-7
• Assignee: Fredy Wijaya
• Reporter: Tim Armstrong
• Created: 06/Jun/18 20:46
• Updated: 21/Dec/20 17:25
• Resolved: 21/Dec/20 17:25

Description

An instance of this bug is that we see a "Default TException" error instead of "Query Id ... Not Found" because of the following issue:

• get_results_metadata() does not declare that it throws BeeswaxException (it declares throwing QueryNotFoundException)
• But our implementation actually throws that in the "Query Id ... Not Found" case
• The Thrift C++ server has some logic that calls .what() on unknown exceptions and wraps them into a TException
• On 3.x, we have THRIFT-727 in Thrift 0.9.3, which implements .what(), so the original error message is present albeit wrapped in some garbage.
• On 2.x .what() does not return any useful information, so we just get a weird empty message

Issue Links

• is related to: IMPALA-7101 Builds are timing out/hanging
• is related to: IMPALA-5869 Cancelling query from impala shell shows TException