[CASSANDRA-10975] Histogram buckets exposed in jmx are sorted by count

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.2.5, 3.0.3, 3.3
• Component/s: Legacy/Observability
• Severity: Normal
• Assignee: Chris Lohfink
• Reporter: Chris Lohfink

Authors

Chris Lohfink

Reviewers

T Jake Luciani

• Created: 06/Jan/16 19:43
• Updated: 16/Apr/19 09:30
• Resolved: 07/Jan/16 17:44

Description

The estimated histogram snapshot lets its parent provide the getValues implementation which sorts the bucket array:
https://github.com/dropwizard/metrics/blob/3.1-maintenance/metrics-core/src/main/java/com/codahale/metrics/UniformSnapshot.java#L25

making it hard to determine what count belonged to what bucket. Along with removal of the pre 2.2 deprecated metrics this makes it nearly impossible to track latencies over time.