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https://issues.apache.org/jira/browse/SOLR-11153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16112904#comment-16112904
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Shawn Heisey commented on SOLR-11153:
-------------------------------------
With the first test run with an early version of the new patch, I got three
failures in tests for solr-core. They did not look related to my patch.
On a second test run that is still underway, where I had updated the patch to
remove "name" and "version" from one of the test schemas to actually test this
problem, more than half of the solr-core tests have been done with no failures
yet. The first run had its failures before that point.
> Incomplete schema results in mysterious error
> ---------------------------------------------
>
> Key: SOLR-11153
> URL: https://issues.apache.org/jira/browse/SOLR-11153
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 4.4, 5.0, 6.0
> Reporter: Shawn Heisey
> Assignee: Shawn Heisey
> Attachments: SOLR-11153.patch, SOLR-11153.patch, SOLR-11153.patch
>
>
> A user on the mailing list was getting a very arcane error trying to load a
> very minimal solrconfig and schema. The error was ultimately caused by NPE
> in SchemaXmlWriter.java at line 85.
> The actual problem turned out to be a missing "name" attribute from the top
> level XML "schema" element in the file.
> {code}
> <?xml version="1.0" encoding="UTF-8" ?>
> <schema version="1.5">
> <fields>
> <field name="_id" type="string" indexed="true" stored="true"
> required="true"/>
> <field name="title" type="string" indexed="true" stored="true"
> required="true"/>
> </fields>
> <uniqueKey>_id</uniqueKey>
> <types>
> <fieldType name="string" class="solr.StrField" />
> </types>
> </schema>
> {code}
> As written, the code will explode with an NPE if the name is missing from the
> schema. Although I can state that the user's minimal config/schema are not
> very useful, Solr should not blow up without a useful error message, and in
> this case, I think it should have worked, only emitting a WARN message and
> assuming a default name.
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