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https://issues.apache.org/jira/browse/KUDU-1736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16263974#comment-16263974
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Alexey Serbin commented on KUDU-1736:
-------------------------------------

And another instance of this bug (debug build, as well):

{noformat}
F1123 08:22:13.245149  9905 delta_tracker.cc:234] Check failed: 
first_copy->delta_stats().min_timestamp() >= 
second_copy->delta_stats().min_timestamp() (7227 vs. 7229) Found out-of-order 
deltas: [{2351438349105711757 (ts range=[7227, 7366], delete_count=[0], 
reinsert_count=[0], update_counts_by_col_id=[12:13))}, {2351438349105711740 (ts 
range=[7229, 7300], delete_count=[0], reinsert_count=[0], 
update_counts_by_col_id=[12:16))}]: type = 1
{noformat}

The full log is attached as mt-tablet-test-20171123.txt

> kudu crash in debug build: unordered undo delta
> -----------------------------------------------
>
>                 Key: KUDU-1736
>                 URL: https://issues.apache.org/jira/browse/KUDU-1736
>             Project: Kudu
>          Issue Type: Bug
>          Components: tablet
>            Reporter: zhangsong
>            Priority: Critical
>         Attachments: mt-tablet-test.txt, mt-tablet-test.txt.gz
>
>
> in jd cluster we met kudu-tserver crash with fatal messages described as 
> follow:
> Check failed: last_key_.CompareTo<UNDO>(key) <= 0 must insert undo deltas in 
> sorted order (ascending key, then descending ts): got key (row 
> 1422@tx6052042821982183424) after (row 1422@tx6052042821953155072)
> This is a dcheck which should not failed.



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