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https://issues.apache.org/jira/browse/TS-4758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Leif Hedstrom updated TS-4758:
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Fix Version/s: sometime
> back up the state machine after parent proxy failures
> -----------------------------------------------------
>
> Key: TS-4758
> URL: https://issues.apache.org/jira/browse/TS-4758
> Project: Traffic Server
> Issue Type: Improvement
> Components: Parent Proxy
> Reporter: James Peach
> Fix For: sometime
>
>
> I don't have a good idea how to handle this, but it would be helpful if
> plugins could get a second chance of a parent proxy fails. The situation now
> is that you have to call {{TSHttpTxnParentProxySet}} and cross your fingers.
> It would be a lot better if the state machine backed up to a hook when the
> parent proxy failed. OS-DNS would be a convenient hook, but it will be hard
> to restart sanely from there since there is a log if state around the DNS
> result. Maybe a new hook would make sense since that could also be used with
> {{TSHttpTxnServerAddrSet}}.
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