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https://issues.apache.org/jira/browse/SOLR-3730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434791#comment-13434791
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Mark Miller commented on SOLR-3730:
-----------------------------------
To clarify, the havoc was generally test havoc - SolrCloud recovery always
moves to a new index folder, so issues with the old index folder are not a
'real' problem - caused strange things in tests though. Std recovery may have
been affected, but I have not seen a case yet.
> Rollback is not implemented quite right and can cause corner case fails in
> SolrCloud tests.
> -------------------------------------------------------------------------------------------
>
> Key: SOLR-3730
> URL: https://issues.apache.org/jira/browse/SOLR-3730
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Reporter: Mark Miller
> Assignee: Mark Miller
> Priority: Minor
> Fix For: 5.0, 4.0
>
>
> Rollback was calling a rollback and then close rather than just a rollback -
> an oversight on my part - somehow this allowed two indexwriters to be open at
> once in some seemingly rare cases...this could cause havoc and was easy to
> miss due to tests using the single lock type.
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