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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (PHOENIX-4119) Upsert uses timestamp of server holding table metadata
Date Thu, 24 Aug 2017 18:13:00 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-4119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Taylor resolved PHOENIX-4119.
-----------------------------------
    Resolution: Duplicate

With PHOENIX-4089 (which will be part of upcoming 4.12 release), Phoenix uses the latest timestamp
when writing data. I'd recommend you synchronize your clocks in your cluster, though.

> Upsert uses timestamp of server holding table metadata
> ------------------------------------------------------
>
>                 Key: PHOENIX-4119
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4119
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.8.0
>            Reporter: Mark Christiaens
>
> When doing an upsert, I noticed that the resulting put-command to HBase uses a timestamp
obtained from the server managing the corresponding table's metadata (cfr. https://issues.apache.org/jira/browse/PHOENIX-1674?focusedCommentId=14349982&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14349982).
 
> Now, if the row that is updated resides on a second server, that second server could
have some clock skew.  After the upsert, if you fetch that updated row without specifying
an explicit query timestamp, then you might not see the effects of the upsert until the second
server's clock has caught up with the first server's clock.
> I think that the desired behavior is that the puts performed occur with a timestamp derived
from the region server where their rows are stored.  (Of course, that still leaves the problem
of region migration from one server to the next but it's a step in the right direction). 




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