[IMPALA-3847] fnv_hash() returns incorrect value

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: Impala 2.1
• Component/s: Clients
• Labels: correctness
• Assignee: Unassigned
• Reporter: Sam Garrett
• Created: 08/Jul/16 21:00
• Updated: 27/Jul/16 20:11
• Resolved: 27/Jul/16 20:11

Description

I was looking at the fnv_hash() function today and was comparing the output with a python script that I'm working on. Impala's output seems off, for example:

select fnv_hash("hello");
=> 6414202926103426347

While other fnv1a-64 implementations return 11831194018420276491.

I checked several python packages and some online fnv hash calculators, all return the 118... value.