[IMPALA-9835] Log spam about kudu_scan_token containing non-UTF-8 values

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.0.0
• Labels: supportability
• Target Version: Impala 4.0.0
• Epic Color: ghx-label-12
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 05/Jun/20 22:37
• Updated: 08/Jun/20 15:53
• Resolved: 08/Jun/20 15:53

Description

If I query a Kudu table I get this in impalad.ERROR.

String field 'impala.ScanRangePB.kudu_scan_token' contains invalid 
UTF-8 data when serializing a protocol buffer. Use the 'bytes' type if you intend to send raw bytes. 

We should prevent this from happening.