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https://issues.apache.org/jira/browse/SOLR-16219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17543531#comment-17543531
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Shawn Heisey commented on SOLR-16219:
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I've just duplicated the issue with my install from the main branch that shows
as version 10.0.0-SNAPSHOT. I was wrong on the possible classloader issues. I
am absolutely sure that the jars have only been loaded once.
What version of Java were you using with Solr 8? Solr 8 only required Java 8,
but Solr 9 requires Java 11. I am running OpenJDK version 11.
Looking at the error message, I can't figure out why it's throwing an illegal
access error. The protected field it's accessing is in the same package, so
Java should allow the access. In my IDE, the code does not show any errors.
> ICUCollationField tried to access protected field
> org.apache.solr.schema.IndexSchema.luceneVersion
> --------------------------------------------------------------------------------------------------
>
> Key: SOLR-16219
> URL: https://issues.apache.org/jira/browse/SOLR-16219
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 9.0
> Reporter: Roman
> Priority: Major
>
> I've tried to recreate Solr 8 configuration in Solr 9, but the following part
> in the config causes an error when creating core. (not SolrCould environment,
> if it matters)
> {code:java}
> <fieldType name="text_gen_sort" class="solr.ICUCollationField" locale=""
> numeric="true" strength="primary" multiValued="true" />{code}
> The following paths has been added in the {{{}solrconfig.xml{}}}:
> {code:java}
> <lib
> path="..../solr/modules/analysis-extras/lib/solr-analysis-extras-9.0.0.jar" />
> <lib path="..../solr/modules/analysis-extras/lib/icu4j-68.2.jar" />
> <lib
> path="..../solr/modules/analysis-extras/lib/lucene-analysis-icu-9.0.0.jar"
> />{code}
> and I checked, that the paths to jars are correct.
> The stack trace is lengthy, here the relevant part of it:
> {code:java}
> <h3>Caused by:</h3><pre>java.lang.IllegalAccessError:
> class org.apache.solr.schema.ICUCollationField tried to access
> protected field org.apache.solr.schema.IndexSchema.luceneVersion
> (org.apache.solr.schema.ICUCollationField is in
> unnamed module of loader java.net.FactoryURLClassLoader @61639b88;
> org.apache.solr.schema.IndexSchema is in unnamed module of loader
> org.eclipse.jetty.webapp.WebAppClassLoader @6a988392)
> at org.apache.solr.schema.ICUCollationField.init(ICUCollationField.java:128)
> at org.apache.solr.schema.FieldType.setArgs(FieldType.java:202)
> at
> org.apache.solr.schema.FieldTypePluginLoader.init(FieldTypePluginLoader.java:149)
> at
> org.apache.solr.schema.FieldTypePluginLoader.init(FieldTypePluginLoader.java:43)
> at
> org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:189)
> at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:531)
> at org.apache.solr.schema.IndexSchema.<init>(IndexSchema.java:188)
> at
> org.apache.solr.schema.ManagedIndexSchema.<init>(ManagedIndexSchema.java:119)
> at
> org.apache.solr.schema.ManagedIndexSchemaFactory.create(ManagedIndexSchemaFactory.java:279)
> at
> org.apache.solr.schema.ManagedIndexSchemaFactory.create(ManagedIndexSchemaFactory.java:51)
> at
> org.apache.solr.core.ConfigSetService.createIndexSchema(ConfigSetService.java:342)
> at
> org.apache.solr.core.ConfigSetService.lambda$loadConfigSet$0(ConfigSetService.java:253)
> at org.apache.solr.core.ConfigSet.<init>(ConfigSet.java:49)
> at
> org.apache.solr.core.ConfigSetService.loadConfigSet(ConfigSetService.java:249)
> at
> org.apache.solr.core.CoreContainer.createFromDescriptor(CoreContainer.java:1550)
> at org.apache.solr.core.CoreContainer.create(CoreContainer.java:1426)
> at
> org.apache.solr.handler.admin.CoreAdminOperation.lambda$static$0(CoreAdminOperation.java:92){code}
> Previous configuration with the same 3 libraries and the field type worked. I
> used {{{}bin/solr create_core -c my_core -d my_configset{}}}. The change is
> in the {{{}managed-schema.xml{}}}. (It used to be just {{manages-schema}} in
> Solr 8, but I recreated the configuration from the new default.)
> This looks to me like some kind of a bug. What can be the cause of this and
> how to overcome the problem?
> (I've also created SO question on this -
> [https://stackoverflow.com/questions/72416721/how-to-configure-icucollationfield-type-in-solr-9]
> )
>
> To recreate, just add the above mentioned parts to solrconfig.xml and
> managed-schema.xml (from _default ) and try to create a core using the
> configset.
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