[jira] [Resolved] (TS-3848) ATS runs without cache or partial cache on disk errors

["Alan M. Carroll (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TS-3848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alan M. Carroll resolved TS-3848.
---------------------------------
    Resolution: Fixed

> ATS runs without cache or partial cache on disk errors
> ------------------------------------------------------
>
>                 Key: TS-3848
>                 URL: https://issues.apache.org/jira/browse/TS-3848
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: Cache
>            Reporter: Pushkar Pradhan
>            Assignee: Alan M. Carroll
>             Fix For: 6.1.0
>
>
> Problem:
> If ATS fails to initialize the cache (none of the disks were accessible), the behavior depends on proxy.config.http.wait_for_cache:
> If wait_for_cache = 0, it will listen for requests and serve the requests (by fetching from origin/parent/peer). 
> If wait_for_cache = 1, it will never listen for requests. This is almost like a hang.
> We would like to change this so that we can take some action when the cache fails to initialize (even partially):
> Proposed Solution:
> Define a new variable: proxy.config.http.cache.required
> Value range: 0-2
> 0 (default) - Do nothing
> 1 - Abort trafficserver if it failed to initialize all the disks/volumes
> 2 - Abort trafficserver if it failed to initialize even one of the disks or volumes.
> Preconditions for this new behavior are:
> proxy.config.http.cache.required = 1 (HTTP caching enabled) and proxy.config.http.wait_for_cache = 1.



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