[SOLR-13290] Prometheus metric exporter AsyncLogger: java.lang.NoClassDefFoundError

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 8.0, 8.1
• Component/s: contrib - prometheus-exporter, metrics
• Assignee: Erick Erickson
• Reporter: Karl Stoney
• Created: 04/Mar/19 16:11
• Updated: 29/Nov/20 06:23
• Resolved: 30/Sep/19 11:59

Description

Since this commit:https://github.com/apache/lucene-solr/commit/02eb9d34404b8fc7225ee7c5c867e194afae17a0

The metrics exporter in branch_8x no longer starts

2019-03-04 16:06:01,070 main ERROR Unable to invoke factory method in class org.apache.logging.log4j.core.async.AsyncLoggerConfig for element AsyncLogger: java.lang.NoClassDefFoundError
: com/lmax/disruptor/EventFactory java.lang.reflect.InvocationTargetException
 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.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:136)
 at org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:964)
 at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:904)
 at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:896)
 at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:514)
 at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:238)
 at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:250)
 at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:548)
 at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:620)
 at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:637)
 at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:231)
 at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:153)
 at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
 at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
 at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:121)
 at org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:43)
 at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:46)
 at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29)
 at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:358)
 at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383)
 at org.apache.solr.prometheus.exporter.SolrExporter.<clinit>(SolrExporter.java:48)
Caused by: java.lang.NoClassDefFoundError: com/lmax/disruptor/EventFactory
 at org.apache.logging.log4j.core.config.AbstractConfiguration.getAsyncLoggerConfigDelegate(AbstractConfiguration.java:203)
 at org.apache.logging.log4j.core.async.AsyncLoggerConfig.<init>(AsyncLoggerConfig.java:91)
 at org.apache.logging.log4j.core.async.AsyncLoggerConfig.createLogger(AsyncLoggerConfig.java:273)
 ... 25 more
Caused by: java.lang.ClassNotFoundException: com.lmax.disruptor.EventFactory
 at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
 ... 28 more

Issue Links

• Is contained by: SOLR-13392 Unable to start prometheus-exporter in 7x branch
• relates to: SOLR-13268 Clean up any test failures resulting from defaulting to async logging