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https://issues.apache.org/jira/browse/SOLR-16728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17707364#comment-17707364
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Houston Putman commented on SOLR-16728:
---------------------------------------
So I don't think this is related?
The classloading issues mentioned have to do with
{{org.eclipse.jetty.alpn.client}} which is in the
{{org.eclipse.jetty:jetty-alpn-client}} library. We get this dependency in
solr-core and solrj transitively through {{org.eclipse.jetty:jetty-client}}.
The Jetty server libraries don't use {{org.eclipse.jetty:jetty-client}}, so
there is no reason that {{org.eclipse.jetty:jetty-alpn-client}} would need to
be in {{server/lib}} or {{server/lib/ext}}. Its packaged in
{{server/solr-webapp/webapp/WEB-INF/lib}}, because its purely a solr-core/solrj
dependency.
I checked and this is also the case in Solr 9.1.1.
Just to make sure, are you using an older version of
{{server/contexts/solr-jetty-context.xml}}? If so this will not be the only
error you face, and you should definitely use the new version.
> ClassCastException while creating new collection using JDK17
> ------------------------------------------------------------
>
> Key: SOLR-16728
> URL: https://issues.apache.org/jira/browse/SOLR-16728
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Server, SolrCloud
> Affects Versions: 9.2
> Reporter: Thomas Wöckinger
> Priority: Critical
>
> Creating a new collection using CollectionAPI results in following error:
> 2023-03-31T08:22:34.574888544Z 2023-03-31 08:22:34.573 WARN
> (httpShardExecutor-5-thread-3) [] o.e.j.i.ManagedSelector Could not accept
> java.nio.channels.SocketChannel[closed]: java.lang.ClassCastException: class
> org.eclipse.jetty.alpn.client.ALPNClientConnection cannot be cast to class
> org.eclipse.jetty.alpn.client.ALPNClientConnection
> (org.eclipse.jetty.alpn.client.ALPNClientConnection is in unnamed module of
> loader org.eclipse.jetty.start.Classpath$Loader @1f89ab83;
> org.eclipse.jetty.alpn.client.ALPNClientConnection is in unnamed module of
> loader org.eclipse.jetty.webapp.WebAppClassLoader @757f675c)
>
> Tested with:
> Red Hat, Inc. OpenJDK 64-Bit Server VM 17.0.6 17.0.6+10-LTS
> Solr started in cloude mode with one node and embedded zookeeper
> /opt/solr/bin/solr start -c -Dsolr.ssl.checkPeerName=false
>
>
>
>
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