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https://issues.apache.org/jira/browse/SOLR-9016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15259689#comment-15259689
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Shai Erera commented on SOLR-9016:
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Thanks [~anshumg] for doing all the backports!
> SolrIdentifierValidator accepts empty names
> -------------------------------------------
>
> Key: SOLR-9016
> URL: https://issues.apache.org/jira/browse/SOLR-9016
> Project: Solr
> Issue Type: Bug
> Components: Server
> Reporter: Shai Erera
> Fix For: 5.5.1, 6.1, 6.0.1
>
> Attachments: SOLR-9016.patch
>
>
> SolrIdentifierValidator accepts shard, collection, cores and alias names
> following this pattern:
> {code}
> ^(?!\\-)[\\._A-Za-z0-9\\-]*$
> {code}
> This accepts an "empty" name. This is easily fixable by changing the {{\*}}
> to {{+}}. However, it also accepts names such as {{..}}, {{,__---}} etc. Do
> we not want to require collection names to have a letter/digit identifier in
> them? Something like the following pattern:
> {code}
> ^(\\.)?[a-zA-Z0-9]+[\\._\\-a-zA-Z0-9]*$
> {code}
> That pattern requires the name to start with an optional {{.}} followed by a
> series of letters/digits followed by the rest of the allowed characters.
> What do you think?
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