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https://issues.apache.org/jira/browse/HBASE-18786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16199491#comment-16199491
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Andrew Purtell commented on HBASE-18786:
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bq. If we really want to handle this situation then we need to introduce
fencing at the HDFS level during failed server processing.
We should follow up on that.
bq. The current situation with handleFileNotFound() seems worse than the
original problem, since it can hide other problems.
Yeah, definitely agree, that's the motivation of this change.
> 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: 2.0.0, 3.0.0, 1.4.0, 1.5.0
>
> Attachments: HBASE-18786-branch-1.3.patch,
> HBASE-18786-branch-1.patch, HBASE-18786-branch-1.patch, HBASE-18786.patch,
> 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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