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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18786) FileNotFoundException should not be silently handled for primary region replicas
Date Mon, 11 Sep 2017 17:53:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16161682#comment-16161682
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Andrew Purtell commented on HBASE-18786:
----------------------------------------

bq. hbase.hregion.unassign.for.fnfe

IMHO, this is not something that should be parameterized. We either do it or we don't. Otherwise
it becomes an obscure setting that could lead to serious conditions if an operator changes
it to the non-default value, which we know won't be well tested. 

> 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
>             Fix For: 1.3.2
>
>
> 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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