[jira] [Work logged] (TS-4751) revalidation can skip updating the Age header

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TS-4751?focusedWorklogId=26391&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-26391 ]

ASF GitHub Bot logged work on TS-4751:
--------------------------------------

                Author: ASF GitHub Bot
            Created on: 12/Aug/16 21:28
            Start Date: 12/Aug/16 21:28
    Worklog Time Spent: 10m 
      Work Description: Github user jpeach commented on the issue:

    https://github.com/apache/trafficserver/pull/864
  
    Ping @zwoop @bryancall @SolidWallOfCode 


Issue Time Tracking
-------------------

    Worklog Id:     (was: 26391)
    Time Spent: 20m  (was: 10m)

> revalidation can skip updating the Age header
> ---------------------------------------------
>
>                 Key: TS-4751
>                 URL: https://issues.apache.org/jira/browse/TS-4751
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: Cache, Core
>            Reporter: James Peach
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> In {{HttpTransact::merge_and_update_headers_for_cache_update}}, the cached {{Age}} header is only updated if the server response also contains an {{Age}} header. If the revalidation response does not contain an {{Age}}, we will retain the cache {{Age}} header which makes the document permanently stale, causing a revalidation on every request.



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