[jira] [Reopened] (HBASE-17292) Add observer notification before bulk loaded hfile is moved to region directory

["Ted Yu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-17292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Yu reopened HBASE-17292:
----------------------------

> Add observer notification before bulk loaded hfile is moved to region directory
> -------------------------------------------------------------------------------
>
>                 Key: HBASE-17292
>                 URL: https://issues.apache.org/jira/browse/HBASE-17292
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0
>
>         Attachments: 17292.addendum, 17292.v1.txt, 17292.v2.txt, 17292.v3.txt
>
>
> Currently the postBulkLoadHFile() hook notifies the locations of bulk loaded hfiles.
> However, if bulk load fails after hfile is moved to region directory but before postBulkLoadHFile() hook is called, there is no way for pluggable components (replication - see HBASE-17290, backup / restore) to know which hfile(s) have been moved to region directory.
> Even if postBulkLoadHFile() is called in finally block, the write (to backup table or zookeeper) issued from postBulkLoadHFile() may fail, ending up with same situation.
> This issue adds a preCommitStoreFile() hook which notifies path of to be committed hfile before bulk loaded hfile is moved to region directory.
> With preCommitStoreFile() hook, write (to backup table or zookeeper) can be issued before the movement of hfile.
> If write fails, IOException would make bulk load fail, not leaving hfile in region directory.



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