我是Solr的新手，正在尝试将solr指标推向Ganglia。 我修改了solr.xml如下：
<solr>
<solrcloud>
<str name="host">${host:}</str>
<int name="hostPort">${jetty.port:8983}</int>
<str name="hostContext">${hostContext:solr}</str>
<bool name="genericCoreNodeNames">${genericCoreNodeNames:true}</bool>
<int name="zkClientTimeout">${zkClientTimeout:30000}</int>
<int name="distribUpdateSoTimeout">${distribUpdateSoTimeout:600000}</int>
<int name="distribUpdateConnTimeout">${distribUpdateConnTimeout:60000}</int>
<str name="zkCredentialsProvider">${zkCredentialsProvider:org.apache.solr.common.cloud.DefaultZkCredentialsProvider}</str>
<str name="zkACLProvider">${zkACLProvider:org.apache.solr.common.cloud.DefaultZkACLProvider}</str>
</solrcloud>
<shardHandlerFactory name="shardHandlerFactory"
class="HttpShardHandlerFactory">
<int name="socketTimeout">${socketTimeout:600000}</int>
<int name="connTimeout">${connTimeout:60000}</int>
</shardHandlerFactory>
<metrics>
<reporter name="ganglia" group="node, jvm" class="org.apache.solr.metrics.reporters.SolrGangliaReporter">
<str name="host">Ganglia IP</str>
<int name="port">8649</int>
<int name="period">60</int>
<str name="prefix">solr</str>
</reporter>
</metrics>
</solr>
现在我正在尝试重新启动Solr服务，它抛出以下错误：
ERROR (main) [ ] o.a.s.c.SolrCore null:java.lang.NoClassDefFoundError: org/acplt/oncrpc/XdrEncodingStream
at info.ganglia.gmetric4j.gmetric.GMetric.<init>(GMetric.java:82)
at info.ganglia.gmetric4j.gmetric.GMetric.<init>(GMetric.java:58)
at info.ganglia.gmetric4j.gmetric.GMetric.<init>(GMetric.java:40)
at org.apache.solr.metrics.reporters.SolrGangliaReporter.lambda$start$0(SolrGangliaReporter.java:136)
at org.apache.solr.metrics.reporters.ReporterClientCache.getOrCreate(ReporterClientCache.java:59)
at org.apache.solr.metrics.reporters.SolrGangliaReporter.start(SolrGangliaReporter.java:136)
at org.apache.solr.metrics.reporters.SolrGangliaReporter.validate(SolrGangliaReporter.java:128)
at org.apache.solr.metrics.SolrMetricReporter.init(SolrMetricReporter.java:58)
at org.apache.solr.metrics.SolrMetricManager.loadReporter(SolrMetricManager.java:757)
at org.apache.solr.metrics.SolrMetricManager.loadReporters(SolrMetricManager.java:728)
at org.apache.solr.core.CoreContainer.load(CoreContainer.java:508)
at org.apache.solr.servlet.SolrDispatchFilter.createCoreContainer(SolrDispatchFilter.java:244)
at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:173)
at org.eclipse.jetty.servlet.FilterHolder.initialize(FilterHolder.java:137)
at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:873)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:349)
at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1404)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1366)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:778)
at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:262)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:520)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:41)
at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:188)
at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:499)
at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:147)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:180)
at org.eclipse.jetty.deploy.providers.WebAppProvider.fileAdded(WebAppProvider.java:458)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:64)
at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:610)
at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:529)
at org.eclipse.jetty.util.Scanner.scan(Scanner.java:392)
at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:313)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:150)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:561)
at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:236)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131)
at org.eclipse.jetty.server.Server.start(Server.java:422)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:113)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
at org.eclipse.jetty.server.Server.doStart(Server.java:389)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1516)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1441)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.jetty.start.Main.invokeMain(Main.java:214)
at org.eclipse.jetty.start.Main.start(Main.java:457)
at org.eclipse.jetty.start.Main.main(Main.java:75)
Caused by: java.lang.ClassNotFoundException: org.acplt.oncrpc.XdrEncodingStream
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 55 more
Solr版本：6.6 操作系统：Ubuntu 16.04
我花了很多时间来探查此错误，但没有找到解决方案