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https://issues.apache.org/jira/browse/HBASE-8700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13687263#comment-13687263
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Lars Hofhansl commented on HBASE-8700:
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Good one. I'd never be opposed to test change in 0.94 (well, as long as the
test still passes :) )
> IntegrationTestBigLinkedList can fail due to random number collision
> --------------------------------------------------------------------
>
> Key: HBASE-8700
> URL: https://issues.apache.org/jira/browse/HBASE-8700
> Project: HBase
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HBASE-8700-0.94.patch, HBASE-8700-v0.patch,
> HBASE-8700-v1.patch
>
>
> The test can fail due to random number collision, claiming there are
> unreferenced elements for obvious reasons (we rewrite some link). Original
> Accumulo test has one-stage generation so it doesn't count unreferenced
> elements as failures, only undefined ones. With 200m longs out of half-long
> range the probability of collision is approx 0.2%.
> Moreover, without some way to debug, it's hard to debug what keys should be
> looked at in such cases
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