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https://issues.apache.org/jira/browse/SOLR-6732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14208844#comment-14208844
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Anshum Gupta commented on SOLR-6732:
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Wouldn't this cause an issue for people who have already moved to 10.2 i.e. it
reverts things and makes things fine for people who never noticed/moved to 10.2
but not for others. We should be injecting back compat handling for 10.2.
> Back-compat break for LIR state in 4.10.2
> -----------------------------------------
>
> Key: SOLR-6732
> URL: https://issues.apache.org/jira/browse/SOLR-6732
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.10.2
> Reporter: Shalin Shekhar Mangar
> Priority: Blocker
> Fix For: 4.10.3
>
> Attachments: SOLR-6732.patch
>
>
> We changed the LIR state to be kept as a map but it is not back-compatible.
> The problem is that we're checking for map or string after parsing JSON but
> if the key has "down" as a string then json parsing will fail.
> This was introduced in SOLR-6511. This error will prevent anyone from
> upgrading to 4.10.2
> http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201411.mbox/%3c54636ed2.8040...@cytainment.de%3E
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