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https://issues.apache.org/jira/browse/HBASE-10702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13924409#comment-13924409
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Lars Hofhansl commented on HBASE-10702:
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Can you share the test code? Might be a discrepancy of timestamps.
> HBase fails to respect Deletes
> ------------------------------
>
> Key: HBASE-10702
> URL: https://issues.apache.org/jira/browse/HBASE-10702
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.2, 0.94.15, 0.94.17
> Reporter: Jean-Marc Spaggiari
> Priority: Critical
>
> One of our user contacted me about an issue with Deletes.
> Some of the deletes they do are not totally processed. Therefore, after the
> Delete, if they do a Get, from time to time, the Get return the row when it
> should have been deleted and should have returned nothing. After multiple
> Deletes, the row is finally deleted. If we don't retry after the 1st attempt,
> the row stays there. Even after a flush, a major_compact, etc.
> I have been able to reproduce the issue in 0.94.2 (CDH4.2.0 EC2),
> 0.94.15(CDH4.6.0 EC2) and 0.94.17 (Apache version bare metal)
> Here is a simple output from my test app.
> 1736509 Doing a delete for 0000099676 failed. Start to count
> puts=311 deletes=64 retries=2
> 2281712 Doing a delete for 0000027606 failed. Start to count
> puts=3679 deletes=247 retries=2
> 2388305 Doing a delete for 0000018306 failed. Start to count
> puts=4744 deletes=290 retries=2
> 2532943 Doing a delete for 0000030446 failed. Start to count
> puts=5678 deletes=337 retries=2
> 2551421 Doing a delete for 0000046304 failed. Start to count
> puts=5845 deletes=345 retries=2
> 2561099 Doing a delete for 0000019619 failed. Start to count
> puts=5869 deletes=347 retries=3
> First field is the time in ms since the test started. So first error occurs
> after about 30 minutes. Below are the number of puts and deletes done, and
> the numbers of required retries to get the value deleted.
> Key is random number between 0000000000 and 0000100000.
> Very simple test. Just doing more puts than deletes.
> Tests are running on 0.96.1.1 for almost 1h now so it seems to be fine, but
> it's not on the same cluster, so I will keep that running for hours/days
> first.
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