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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-4089) Prevent index from getting out of sync with data table under high concurrency
Date Wed, 16 Aug 2017 15:47:00 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-4089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Taylor updated PHOENIX-4089:
----------------------------------
    Attachment: PHOENIX-4089_4.x-HBase-0.98.patch

> Prevent index from getting out of sync with data table under high concurrency
> -----------------------------------------------------------------------------
>
>                 Key: PHOENIX-4089
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4089
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: James Taylor
>         Attachments: PHOENIX-4089_4.x-HBase-0.98.patch
>
>
> Under high concurrency, we're still seeing the index get out of sync with the data table.
It seems that the particular case is when the same Put occurs with the same time stamp from
different clients, based on the locking we do, Phoenix thinks a different Put was the last
one than HBase does, leading to inconsistencies.
> The solution is to timestamp the cells on the server-side after the lock has been taken.
The new concurrent unit test passes 50x with this in place, while it otherwise fails 1/10
of the time (or more on HBase 1.3).



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