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https://issues.apache.org/jira/browse/SOLR-13815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16944569#comment-16944569
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Yonik Seeley commented on SOLR-13815:
-------------------------------------
OK, I updated the PR with code to show what document is missing.
The current test fails about 5% of the time (on my old linux box at least.)
I uploaded an example failing run:
https://issues.apache.org/jira/secure/attachment/12982242/fail.191004_093307
The missing documents always seems to be right near the end. For example in
this run:
{code}
2> 14727 ERROR (TEST-SplitShardTest.testLiveSplit-seed#[871F69E54EBB37FF]) [
] o.a.s.c.SplitShardTest MISSING DOCUMENT doc_68
> Throwable #1: java.lang.AssertionError: expected:<71> but was:<70>
{code}
So 71 documents were expected, only 70 were found, and it was doc #68 (numbered
from 0) that was missing.
> Live split can lose data
> ------------------------
>
> Key: SOLR-13815
> URL: https://issues.apache.org/jira/browse/SOLR-13815
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Yonik Seeley
> Priority: Major
> Attachments: fail.191004_093307
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> This issue is to investigate potential data loss during a "live" split (i.e.
> split happens while updates are flowing)
> This was discovered during the shared storage work which was based on a
> non-release branch_8x sometime before 8.3, hence the first steps are to try
> and reproduce on the master branch without any shared storage changes.
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