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https://issues.apache.org/jira/browse/TS-2559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14134279#comment-14134279
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Sudheer Vinukonda commented on TS-2559:
---------------------------------------

It looks like this commit incorrectly places the error'ed server session back 
into the pool, potentially impacting subsequent requests. We are seeing a 
(slightly) increased POST failures with ats5 compared to ats4 and I am 
wondering if this commit could be the reason. Coincidentally, it seems that 
[~briang] also noticed this issue and provided a fix in TS-2991. Trying out 
that fix in our network to see if it resolves the POST issue.

> active timeouts do not disconnect client sessions
> -------------------------------------------------
>
>                 Key: TS-2559
>                 URL: https://issues.apache.org/jira/browse/TS-2559
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: Core
>            Reporter: James Peach
>            Assignee: James Peach
>             Fix For: 5.0.0
>
>
> If you set {{proxy.config.http.transaction_active_timeout_out}}, and a 
> transaction aborts with a timeout when {{traffic_server}} is receiving the 
> response body from the origin, the cache write is shut down but the client is 
> left connected. There's no way for the client to handle this error except by 
> timing our, so the right behavior is to shut down all the consumers.



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