[jira] [Resolved] (SOLR-13718) SPLITSHARD using async can cause data loss

["Ishan Chattopadhyaya (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-13718?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ishan Chattopadhyaya resolved SOLR-13718.
-----------------------------------------
    Resolution: Fixed

> SPLITSHARD using async can cause data loss
> ------------------------------------------
>
>                 Key: SOLR-13718
>                 URL: https://issues.apache.org/jira/browse/SOLR-13718
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 7.7.2, 8.1, 8.2
>            Reporter: Ishan Chattopadhyaya
>            Assignee: Ishan Chattopadhyaya
>            Priority: Major
>             Fix For: 7.7.3, 8.3
>
>         Attachments: SOLR-13718.patch, solr-13718-reproduce.sh, solr.zip
>
>
> When using SPLITSHARD with async, if there are underlying failures in the SPLIT core command or other sub-commands of SPLITSHARD, then SPLITSHARD succeeds and results in two empty sub-shards.
> There are various potential failures with SPLIT core command, here's a way to reproduce using a Solr 6x index in Solr 7x.
> -Steps to reproduce (in Solr 7x):-
> {code}
> 1. Import the attached configset, and create a collection.
> 2. Move in the attached data directory (index created in Solr6x) in place of the created collection's data directory. Do a collection RELOAD.
> 3. Issue a *:* query, we see 5 documents.
> 4. Issue a SPLITSHARD (async), and then issue *:*, we see 0 documents.
> {code}
> Check attached solr-13718-reproduce.sh script to do the same (without needing the zip file).



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