[KUDU-2414] C++ client retries in a tight loop for SCANNER_EXPIRED

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.0, 1.4.0, 1.5.0, 1.6.0, 1.7.0, 1.8.0
• Fix Version/s: 1.8.0
• Component/s: client
• Target Version/s: 1.8.0
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 23/Apr/18 23:23
• Updated: 24/Apr/18 01:04
• Resolved: 24/Apr/18 01:04

Description

Found this bug way back in Dec 2016 but was sitting around in gerrit instead of a JIRA. If the C++ client hits a SCANNER_EXPIRED error, it doesn't blacklist the tablet server (because the server itself is fine), and this caused the client to think it could retry on the same server. This led to a tight loop of retries until the timeout elapsed.