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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7339) Splitting a hfilelink causes region servers to go down.
Date Sat, 15 Dec 2012 23:18:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13533203#comment-13533203
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stack commented on HBASE-7339:
------------------------------

Why would #3 break compatibility?  hfilelink is not in a release yet.  Could we not differentiate
old and new style references -- the one w/ '.' delimiter and the other w/ '@' delimiter ('@'
is probably not a good character to use in filename given that hdfs filenames are url parts).
 Let me take a looksee at your approach #1 patch.
                
> Splitting a hfilelink causes region servers to go down.
> -------------------------------------------------------
>
>                 Key: HBASE-7339
>                 URL: https://issues.apache.org/jira/browse/HBASE-7339
>             Project: HBase
>          Issue Type: Sub-task
>          Components: snapshots
>    Affects Versions: hbase-6055
>            Reporter: Jonathan Hsieh
>            Assignee: Jonathan Hsieh
>            Priority: Blocker
>             Fix For: hbase-6055
>
>         Attachments: hbase-7339.patch, pre-hbase-7339.patch
>
>
> Steps:
> - Have a single region table t with 15 hfiles in it.
> - Snapshot it. (was done using online snapshot from HBASE-7321)
> - Clone a snapshot to table t'. 
> - t' has its region do a post-open task that attempts to compact region.  policy does
not compact all files. (default seems to be 10)
> - after compaction we have hfile links and real hfiles mixed in the region
> - t' starts splitting
> - creating split references, opening daughers fails 
> - hfile links are "split", creating hfile link daughter refs.  {{<<hfile>\-<region>\-<table>>.<parentregion>}}
> - these "split" hfile links are interpreted as hfile links with table {{<table>.<parentregion>}}
-> {{<<hfile>\-<region>>\-<<table>.<parentregion>>}}
 (groupings interpreted incorrectly)
> - Since this is after the splitting PONR, this aborts the server.  It then spreads to
the next server.

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