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https://issues.apache.org/jira/browse/TS-3096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14148144#comment-14148144
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Alan M. Carroll commented on TS-3096:
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How are you accessing the data from TSHttpConnect? There were some changes made
to that semi-recently. What is the behavior in 5.1.x?
> After TS-2751 TSVConnClosedGet changed its behaviour
> ----------------------------------------------------
>
> Key: TS-3096
> URL: https://issues.apache.org/jira/browse/TS-3096
> Project: Traffic Server
> Issue Type: Bug
> Components: TS API
> Reporter: Daniel Vitor Morilha
> Priority: Critical
> Fix For: 5.2.0
>
>
> One of our plug-ins initiates a background connection to an origin by using
> TSHttpConnect API.
> While handling the continuation events (WRITE, READ) the plug-in checks if
> the vconnection is still open by calling TSVConnClosedGet(vconnection).
> ATS recently changed the behavior. Now TSVConnClosedGet(vconnections) returns
> a value different than 0 before any data can be retrieved.
> If the call to TSVConnClosedGet is ignored the plug-in successfully writes
> the request and receives the response.
> By investigation our different Traffic Server versions the described change
> seems to be related with TS-2751.
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