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https://issues.apache.org/jira/browse/KUDU-1767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15705950#comment-15705950
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Dan Burkert commented on KUDU-1767:
-----------------------------------
Is this consistency guarantee documented? I was not under the impression that
the C++ or Java clients guaranteed this. It really hurts parallelism to do so
(only one batch can be in flight to a tablet server at once). Additionally its
not that strong of a guarantee when you consider that rows falling in separate
tablets absolutely do not have this guarantee.
> Reordering of client operations from the same KuduSession is possible
> ---------------------------------------------------------------------
>
> Key: KUDU-1767
> URL: https://issues.apache.org/jira/browse/KUDU-1767
> Project: Kudu
> Issue Type: Bug
> Components: client, tablet
> Affects Versions: 1.1.0
> Reporter: Mike Percy
> Priority: Critical
>
> It is possible for client operations written via the same KuduSession to be
> reordered on the server side in MANUAL_FLUSH and AUTO_BACKGROUND_FLUSH modes.
> This violates our desired consistency guarantees.
> This may occur because we allow concurrent flushes from the client for
> throughput reasons and there is nothing enforcing the well-ordering of lock
> acquisition from a single client session on the server side.
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