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https://issues.apache.org/jira/browse/SOLR-16810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SOLR-16810:
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Labels: pull-request-available (was: )
> Under certain situations Solr produces managed schema XML that cannot be
> loaded
> -------------------------------------------------------------------------------
>
> Key: SOLR-16810
> URL: https://issues.apache.org/jira/browse/SOLR-16810
> Project: Solr
> Issue Type: Bug
> Components: Schema and Analysis
> Affects Versions: 9.2.1
> Reporter: Thiruvalluvan M. G.
> Assignee: Eric Pugh
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> While persisting the {{ManagedIndexSchema}} as XML, non-printable characters
> in field names get escaped as {{{}#nn;{}}}, where {{nn}} is the decimal
> representation of the non-printable character. For example, if the field name
> has the byte {{{}0x14{}}}, it gets escaped as {{{}#20;{}}}. This in
> indistinguishable from the literal {{#20;}} in the field name. If we have two
> fields - one with the non-printable character and the other with the literal
> string, two fields get generated with the same name. Loading the resulting
> XML, naturally, causes an exception. To fix this, any occurrence of literal
> {{#}} in the field name should be escaped, with say {{{}##{}}}.
> A second problem is that while escaping happens when generating XML, the
> corresponding unescaping does not happen on loading it. This asymmetry should
> be fixed as well.
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