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https://issues.apache.org/jira/browse/TS-1674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13567696#comment-13567696
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Leif Hedstrom commented on TS-1674:
-----------------------------------
That seems scary. Can you accomplish that without introducing locks? The whole
point of per thread stats is that they are very cheap to maintain.
> TSStatIntDecrement is broken
> ----------------------------
>
> Key: TS-1674
> URL: https://issues.apache.org/jira/browse/TS-1674
> Project: Traffic Server
> Issue Type: Bug
> Components: TS API
> Reporter: Brian Geffon
> Assignee: Brian Geffon
> Fix For: 3.3.1
>
>
> ATS keeps a thread-local copy of the stat value and aggregates it
> periodically and on demand when stats are being collected. However the
> decrement function doesn't let a value go negative. So in a thread that has
> not incremented this stat previously, the decrement call "fails". This
> negative value check is logically flawed as it doesn't account for the
> per-thread distribution of the stats.
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