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https://issues.apache.org/jira/browse/SOLR-16805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17726067#comment-17726067
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Senthil Kumar commented on SOLR-16805:
--------------------------------------
Yes I was using "org.apache.solr.security.KerberosPlugin". And issue got
resolved after using solr.KerberosPlugin.
But it will be good to insert piece of code to validate the authentication
plugin class names and write WARN log traces if it is wrong.
> 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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