[jira] [Created] (TS-4758) back up the state machine after parent proxy failures

["James Peach (JIRA)" <ji...@apache.org>]

James Peach created TS-4758:
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             Summary: 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


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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