[IMPALA-344] StatsMetrics may write unparseable JSON when a value is NaN or inf

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 1.0
• Fix Version/s: Impala 1.0.1
• Assignee: Henry Robinson
• Reporter: Henry Robinson
• Created: 08/May/13 17:50
• Updated: 15/May/13 18:14
• Resolved: 13/May/13 21:23

Description

JSON doesn't allow nan or inf as valid double literals. There's no accepted way to represent nonfinite values in JSON, so the convention is apparently to use null and lose the ability to distinguish between nan and inf. That's what we'll do for now.

This affects a StatsMetric before any updates have been made to it, since it's mean is NaN.