[jira] [Updated] (HBASE-18786) FileNotFoundException should not be silently handled for primary region replicas

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-18786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell updated HBASE-18786:
-----------------------------------
    Attachment: HBASE-18786.patch

Patch for master. Let me port this back down to branch-1.4. Will check tests along the way. May need a bit more work (esp on tests)

> FileNotFoundException should not be silently handled for primary region replicas
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-18786
>                 URL: https://issues.apache.org/jira/browse/HBASE-18786
>             Project: HBase
>          Issue Type: Sub-task
>          Components: regionserver, Scanners
>            Reporter: Ashu Pachauri
>            Assignee: Andrew Purtell
>             Fix For: 1.3.2
>
>         Attachments: HBASE-18786.patch
>
>
> This is a follow up for HBASE-18186.
> FileNotFoundException while scanning from a primary region replica can be indicative of a more severe problem. Handling them silently can cause many underlying issues go undetected. We should either
> 1. Hard fail the regionserver if there is a FNFE on a primary region replica, OR
> 2. Report these exceptions as some region / server level metric so that these can be proactively investigated.



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