[jira] [Commented] (HBASE-18242) ClientSideRegionScanner#openRegion, deleted files under regionEncodeName/.tmp

["Enis Soztutar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-18242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16059808#comment-16059808 ] 

Enis Soztutar commented on HBASE-18242:
---------------------------------------

Is this related to mounting snapshots without restoring them? 
HRegion already has a "read-only" mode which does not do any action (like replaying recovered edits, removing tmp files etc) that we can make use of. 

> ClientSideRegionScanner#openRegion, deleted files under regionEncodeName/.tmp
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-18242
>                 URL: https://issues.apache.org/jira/browse/HBASE-18242
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.10, 1.3.0
>            Reporter: Bo Cui
>            Priority: Minor
>
> There are two ways to open region:
> 1, RS#openRegion:flush, compact, split, merge, scan, get, etc.
> 2, Client#openRegion: only scan, get
> Either way, all files under /hbase/data/default/TableName/RegionEncodeName/.tmp will be deleted when region is initialized
> For method 2, this should not happen: the client opening region can only read data; there is no possibility of compaction or flush; if RS is processing compact, and client removes the tmp file, the RS needs to be re executed.



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