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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5754) data lost with gora continuous ingest test (goraci)
Date Tue, 17 Jul 2012 13:39:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13416177#comment-13416177
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Eric Newton commented on HBASE-5754:
------------------------------------

I will try to reproduce the bug with 0.94 and hadoop 1.0.3 sometime in the next week.

We normally run this test against Accumulo for 24 hours, both with and without agitation (random
killing of servers).  I would be concerned if there was apparent data loss, even if it was
transient.

                
> data lost with gora continuous ingest test (goraci)
> ---------------------------------------------------
>
>                 Key: HBASE-5754
>                 URL: https://issues.apache.org/jira/browse/HBASE-5754
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.92.1
>         Environment: 10 node test cluster
>            Reporter: Eric Newton
>            Assignee: stack
>
> Keith Turner re-wrote the accumulo continuous ingest test using gora, which has both
hbase and accumulo back-ends.
> I put a billion entries into HBase, and ran the Verify map/reduce job.  The verification
failed because about 21K entries were missing.  The goraci [README|https://github.com/keith-turner/goraci]
explains the test, and how it detects missing data.
> I re-ran the test with 100 million entries, and it verified successfully.  
> Both of the times I tested using a billion entries, the verification failed.
> If I run the verification step twice, the results are consistent, so the problem is
> probably not on the verify step.
> Here's the versions of the various packages:
> ||package||version||
> |hadoop|0.20.205.0|
> |hbase|0.92.1|
> |gora|http://svn.apache.org/repos/asf/gora/trunk r1311277|
> |goraci|https://github.com/ericnewton/goraci  tagged 2012-04-08|
> The change I made to goraci was to configure it for hbase and to allow it to build properly.

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