[
https://issues.apache.org/jira/browse/HBASE-18399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16118704#comment-16118704
]
ramkrishna.s.vasudevan commented on HBASE-18399:
------------------------------------------------
With the patch in HBASE-18398 I hope this issue will also be solved?
> Files in a snapshot can go missing even after the snapshot is taken
> successfully
> --------------------------------------------------------------------------------
>
> Key: HBASE-18399
> URL: https://issues.apache.org/jira/browse/HBASE-18399
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver, Scanners
> Reporter: Ashu Pachauri
> Fix For: 1.3.2
>
>
> Files missing after the snapshot is taken (only applicable when the TTL for
> the TimeToLiveHFileCleaner is small, like the default 5 mins)
> * SnapshotManifest#addRegion visits store_file_A, but is yet to write it
> to the manifest.
> * store_file_A is marked as compacted away and HFileArchiver moves the
> file to archive.
> * HFileCleaner comes in and sees the store_file_A in archive. It adds the
> file to the list of files that might need to be cleaned up.
> * HFileCleaner's SnapshotHFileCleaner plugin is kicked in.
> * SnapshotFileCache#getUnreferencedFiles also says that store_file_A is
> unreferenced and should be cleaned up (It has not yet been written to the
> manifest).
> * SnapshotHFileCleaner is still going through rest of the files in
> archive.
> * store_file_A reference is created and written to snapshot manifest.
> * Snapshot verification runs and sees the store_file_A is present in
> archive, and thus the verification passes.
> * Now, the SnapshotHFileCleaner finishes and TimeToLiveHFileCleaner is
> triggered. If TTL has passed since the store_file_A was moved to archive
> (SnapshotHFileCleaner could take easily several minutes to go through rest of
> the files), the TimeToLiveHFileCleaner also marks the file as deletable.
> * Since all cleaner plugins marked file as deletable, the store_file_A is
> deleted.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
