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https://issues.apache.org/jira/browse/SOLR-16805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17723458#comment-17723458
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Houston Putman commented on SOLR-16805:
---------------------------------------
The fact that its the SolrResourceLoader that is giving the error makes it
definitely different from the other ticket, since the issue there was that the
SolrResourceLoader wasn't being used.
Can you share exactly how you start solr? Because it seems to be an issue with
getting the Solr Module code into the SolrResourceLoader.
> org.apache.solr.common.SolrException: Error loading class
> 'solr.KerberosPlugin'
> --------------------------------------------------------------------------------
>
> Key: SOLR-16805
> URL: https://issues.apache.org/jira/browse/SOLR-16805
> Project: Solr
> Issue Type: Bug
> Components: Authentication
> Affects Versions: 9.2.1
> Environment: OS: Debian 11
> Solr Version : 9.2.1
> Java Version: 11
> Reporter: Senthil Kumar
> Assignee: Houston Putman
> Priority: Major
> Labels: kerberos, solrcloud
>
> I am facing the same "Error loading class 'solr.KerberosPlugin'" even in Solr
> 9.2.1
>
> I have copied hadoop-auth classes to WEB_INF/lib and also tried setting
> SOLR_MODULES=hadoop-auth,hdfs too. But still I am seeing this issue both in
> 9.2.0 and 9.2.1
>
> It will be helpful if you add more insight to resolve this issue
>
> Below is the Error stack trace:
> {{
> 2023-05-17 11:02:38.998 INFO (zkCallback-13-thread-1) []
> o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
> 2023-05-17 11:02:39.037 INFO (main) [] o.a.s.c.CoreContainer Initializing
> authentication plugin: org.apache.solr.security.KerberosPlugin
> 2023-05-17 11:02:39.044 ERROR (main) [] o.a.s.s.CoreContainerProvider Could
> not start Solr. Check solr/home property and the logs
> 2023-05-17 11:02:39.064 ERROR (main) [] o.a.s.c.SolrCore null =>
> *org.apache.solr.common.SolrException: Error loading class
> 'org.apache.solr.security.KerberosPlugin'*
> at
> org.apache.solr.core.{*}SolrResourceLoader.findClass(SolrResourceLoader.java:550){*}
> org.apache.solr.common.SolrException: *Error loading class
> 'org.apache.solr.security.KerberosPlugin'*
> at
> org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:550)
> ~[solr-core-9.2.1.jar:9.2.1 a4c64ab6a2a270ca69c28c706dabb2927ed8a7c2 -
> jsweeney - 2023-04-24 11:35:31]
> at
> org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:612)
> ~[solr-core-9.2.1.jar:9.2.1 a4c64ab6a2a270ca69c28c706dabb2927ed8a7c2 -
> jsweeney - 2023-04-24 11:35:31]
> at
> org.apache.solr.core.{*}CoreContainer.initializeAuthenticationPlugin(CoreContainer.java:558){*}
> ~[solr-core-9.2.1.jar:9.2.1 a4c64ab6a2a270ca69c28c706dabb2927ed8a7c2 -
> jsweeney - 2023-04-24 11:35:31]
> at
> org.apache.solr.core.CoreContainer.reloadSecurityProperties(CoreContainer.java:1159)
> ~[solr-core-9.2.1.jar:9.2.1 a4c64ab6a2a270ca69c28c706dabb2927ed8a7c2 -
> jsweeney - 2023-04-24 11:35:31]
> at
> org.apache.solr.core.{*}CoreContainer.load(CoreContainer.java:823){*}
> ~[solr-core-9.2.1.jar:9.2.1 a4c64ab6a2a270ca69c28c706dabb2927ed8a7c2 -
> jsweeney - 2023-04-24 11:35:31]
> at
> org.apache.solr.servlet.CoreContainerProvider.createCoreContainer(CoreContainerProvider.java:412)
> ~[solr-core-9.2.1.jar:9.2.1 a4c64ab6a2a270ca69c28c706dabb2927ed8a7c2 -
> jsweeney - 2023-04-24 11:35:31]
> at
> org.apache.solr.servlet.CoreContainerProvider.init(CoreContainerProvider.java:230)
> ~[solr-core-9.2.1.jar:9.2.1 a4c64ab6a2a270ca69c28c706dabb2927ed8a7c2 -
> jsweeney - 2023-04-24 11:35:31]
> at
> org.apache.solr.servlet.CoreContainerProvider.contextInitialized(CoreContainerProvider.java:114)
> ~[solr-core-9.2.1.jar:9.2.1 a4c64ab6a2a270ca69c28c706dabb2927ed8a7c2 -
> jsweeney - 2023-04-24 11:35:31]
> at
> org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:1048)
> ~[jetty-server-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:624)
> ~[jetty-servlet-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.server.handler.ContextHandler.contextInitialized(ContextHandler.java:983)
> ~[jetty-server-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:740)
> ~[jetty-servlet-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:392)
> ~[jetty-servlet-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1304)
> ~[jetty-webapp-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:900)
> ~[jetty-server-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:306)
> ~[jetty-servlet-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:532)
> ~[jetty-webapp-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:93)
> ~[jetty-util-10.0.13.jar:10.0.13]
> at
> org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:171)
> ~[jetty-util-10.0.13.jar:10.0.13]
> }}
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