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  1. Solr
  2. SOLR-16240

org.apache.solr.common.SolrException: Error loading class 'solr.KerberosPlugin'

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 9.0, 9.1, 9.2
    • 9.3, 9.2.1
    • Authentication

    • OS: Debian 11

      Solr Version : 9.0

      Java Version: 11

    Description

      Hello everyone. I upgraded my test environment cluster from 8.11.1 to 9.0.0 and I'm experimenting this issue. Anytime I start the solr service I get this error from logs and I don't know what I have to do to solve it:

      2022-06-07 08:06:47.801 ERROR (main) [   ] o.a.s.c.SolrCore null => org.apache.solr.common.SolrException:  Error loading class 'solr.KerberosPlugin'
    at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:543)
org.apache.solr.common.SolrException:  Error loading class 'solr.KerberosPlugin'
    at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:543) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    at org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:604) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    at org.apache.solr.core.CoreContainer.initializeAuthenticationPlugin(CoreContainer.java:521) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    at org.apache.solr.core.CoreContainer.reloadSecurityProperties(CoreContainer.java:1053) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    at org.apache.solr.core.CoreContainer.load(CoreContainer.java:765) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    at org.apache.solr.servlet.CoreContainerProvider.createCoreContainer(CoreContainerProvider.java:376) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    at org.apache.solr.servlet.CoreContainerProvider.init(CoreContainerProvider.java:226) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    at org.apache.solr.servlet.CoreContainerProvider.contextInitialized(CoreContainerProvider.java:110) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:1067) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:572) ~[jetty-servlet-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.ContextHandler.contextInitialized(ContextHandler.java:996) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:746) ~[jetty-servlet-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:379) ~[jetty-servlet-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1449) ~[jetty-webapp-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1414) ~[jetty-webapp-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:910) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:288) ~[jetty-servlet-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524) ~[jetty-webapp-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.gzip.GzipHandler.doStart(GzipHandler.java:426) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.Server.start(Server.java:423) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.server.Server.doStart(Server.java:387) ~[jetty-server-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) ~[jetty-util-9.4.44.v20210927.jar:9.4.44.v20210927]
    at org.eclipse.jetty.xml.XmlConfiguration.lambda$main$3(XmlConfiguration.java:1907) ~[jetty-xml-9.4.44.v20210927.jar:9.4.44.v20210927]
    at java.security.AccessController.doPrivileged(Native Method) ~[?:?]
    at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1857) ~[jetty-xml-9.4.44.v20210927.jar:9.4.44.v20210927]
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?]
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
    at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
    at org.eclipse.jetty.start.Main.invokeMain(Main.java:218) ~[start.jar:9.4.44.v20210927]
    at org.eclipse.jetty.start.Main.start(Main.java:491) ~[start.jar:9.4.44.v20210927]
    at org.eclipse.jetty.start.Main.main(Main.java:77) ~[start.jar:9.4.44.v20210927]
Caused by: java.lang.ClassNotFoundException: solr.KerberosPlugin
    at java.net.URLClassLoader.findClass(URLClassLoader.java:476) ~[?:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:589) ~[?:?]
    at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:904) ~[?:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[?:?]
    at java.lang.Class.forName0(Native Method) ~[?:?]
    at java.lang.Class.forName(Class.java:398) ~[?:?]
    at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:527) ~[solr-core-9.0.0.jar:9.0.0 a4eb7aa123dc53f8dac74d80b66a490f2d6b4a26 - janhoy - 2022-05-05 01:00:08]
    ... 55 more

      When I rollback to 8.11.1 with exactly the same configuration I don't experiment this issue.

      I tried:

      1. Set the "SOLR_JETTY_HOST="0.0.0.0"
      2. Set the "SOLR_MODULES=hadoop-auth" because it uses kerberos too.
      3. I read the documentation about Kerberos Authentication  and it's pretty similar to the 8.11.1 version.
      4. I modified my  security.json like this:

      {"authentication": {"class": "solr.KerberosPlugin"}}

      I don't know if there's something missing on the documentation or if I doing something wrong, which is the most probably.

      I hope the issue is well described, I searched in the web but I haven't found anything related.

       

      Best regards.

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          causes

          Bug - A problem which impairs or prevents the functions of the product. SOLR-16801 CoreContainer overrides context class loader

          • Major - Major loss of function.
          • Closed
          is caused by

          Task - A task that needs to be done. SOLR-13989 Migrate hadoop authentication code to a module

          • Major - Major loss of function.
          • Closed
          is cloned by

          Bug - A problem which impairs or prevents the functions of the product. SOLR-16805 org.apache.solr.common.SolrException: Error loading class 'solr.KerberosPlugin'

          • Major - Major loss of function.
          • Open
          relates to

          Improvement - An improvement or enhancement to an existing feature or task. SOLR-15914 Make it super simple to add a contrib module to shared classpath

          • Blocker - Blocks development and/or testing work, production could not run
          • Closed
          links to

          Web Link GitHub Pull Request #1546

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              houston Houston Putman
              jrballesteros05 Jesús Ricardo Ballesteros Molina
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