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https://issues.apache.org/jira/browse/TS-2991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14134286#comment-14134286
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Sudheer Vinukonda commented on TS-2991:
---------------------------------------
It looks like this issue is due to TS-2559 which 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 which could be caused by TS-2559. Trying out the fix to see if it helps.
> SessionManager incorrectly releasing sessions back to pool
> ----------------------------------------------------------
>
> Key: TS-2991
> URL: https://issues.apache.org/jira/browse/TS-2991
> Project: Traffic Server
> Issue Type: Bug
> Components: Core
> Reporter: Brian Geffon
> Assignee: Brian Geffon
> Fix For: 5.1.0
>
>
> We've seen an issue where Traffic Server receives a response w/ a Connection:
> Close header followed by an EOS caused by a TCP FIN. What happens is that the
> tunnel_hander_server() is incorrectly keeping the connection open due to the
> EOS code path not detecting the connection close. This results in failed
> connections and other weird transient issues. Patch incoming.
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