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https://issues.apache.org/jira/browse/HBASE-12978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14313785#comment-14313785
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stack commented on HBASE-12978:
-------------------------------

The file just previous to this one -- the result of a compaction on meta -- 
seems fine.  Looking at its indices, I see stuff like this:

key=IntegrationTestBigLinkedList,C//LATEST_TIMESTAMP/Maximum
  offset=166171, dataSize=8247

... so this looks like our index entry 'tightener', the code that shrinks the 
keys so take up less space in index.  The problematic one is this:

key=IntegrationTestBigLinkedList,,//LATEST_TIMESTAMP/Maximum
  offset=116101, dataSize=8298

... which has the double ',,' in it which has special meaning for our meta 
table comparators.....

> hbase:meta has a row missing hregioninfo and it causes my long-running job to 
> fail
> ----------------------------------------------------------------------------------
>
>                 Key: HBASE-12978
>                 URL: https://issues.apache.org/jira/browse/HBASE-12978
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>             Fix For: 1.0.1
>
>         Attachments: e7cadabc6e5e46c7bf6b3d445f0c53cf
>
>
> Testing 1.0.0 trying long-running tests.
> A row in hbase:meta was missing its HRI entry. It caused the job to fail. 
> Around the time of the first task failure, there are balances of the 
> hbase:meta region and it was on a server that crashed. I tried to look at 
> what happened around time of our writing hbase:meta and I ran into another 
> issue; 20 logs of 256MBs filled with WrongRegionException written over a 
> minute or two. The actual update of hbase:meta was not in the logs, it'd been 
> rotated off.



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