at ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type de.siegmar.logbackgelf.GelfTcpAppender

[NehaK214]

Hi @osiegmar,

While integrating GelfTcpAppender we are getting the below mentioned error:
ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type de.siegmar.logbackgelf.GelfTcpAppender

Stack Trace For the same:

ERROR in ch.qos.logback.core.joran.action.AppenderAction - Could not create an Appender of type [de.siegmar.logbackgelf.GelfTcpAppender]. ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type de.siegmar.logbackgelf.GelfTcpAppender
[INFO] at ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type de.siegmar.logbackgelf.GelfTcpAppender
[INFO] at at ch.qos.logback.core.util.OptionHelper.instantiateByClassNameAndParameter(Unknown Source)
[INFO] at at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(Unknown Source)
[INFO] at at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.action.AppenderAction.begin(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.spi.Interpreter.callBeginAction(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.spi.Interpreter.startElement(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.spi.Interpreter.startElement(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.spi.EventPlayer.play(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(Unknown Source)
[INFO] at at com.hivemq.bootstrap.LoggingBootstrap.overrideLogbackXml(Unknown Source)
[INFO] at at com.hivemq.bootstrap.LoggingBootstrap.initLogging(Unknown Source)
[INFO] at at com.hivemq.HiveMQServer.a(Unknown Source)
[INFO] at at com.hivemq.HiveMQServer.d(Unknown Source)
[INFO] at at com.hivemq.HiveMQServer.main(Unknown Source)
[INFO] Caused by: java.lang.ClassNotFoundException: de.siegmar.logbackgelf.GelfTcpAppender
[INFO] at at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
[INFO] at at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
[INFO] at at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
[INFO] at ... 17 common frames omitted
[INFO] 10:51:37,612 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@9:86 - ActionException in Action for tag [appender] ch.qos.logback.core.joran.spi.ActionException: ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type de.siegmar.logbackgelf.GelfTcpAppender
[INFO] at ch.qos.logback.core.joran.spi.ActionException: ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type de.siegmar.logbackgelf.GelfTcpAppender
[INFO] at at ch.qos.logback.core.joran.action.AppenderAction.begin(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.spi.Interpreter.callBeginAction(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.spi.Interpreter.startElement(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.spi.Interpreter.startElement(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.spi.EventPlayer.play(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(Unknown Source)
[INFO] at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(Unknown Source)
[INFO] at at com.hivemq.bootstrap.LoggingBootstrap.overrideLogbackXml(Unknown Source)
[INFO] at at com.hivemq.bootstrap.LoggingBootstrap.initLogging(Unknown Source)
[INFO] at at com.hivemq.HiveMQServer.a(Unknown Source)
[INFO] at at com.hivemq.HiveMQServer.d(Unknown Source)
[INFO] at at com.hivemq.HiveMQServer.main(Unknown Source)
[INFO] Caused by: ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type de.siegmar.logbackgelf.GelfTcpAppender
[INFO] at at ch.qos.logback.core.util.OptionHelper.instantiateByClassNameAndParameter(Unknown Source)
[INFO] at at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(Unknown Source)
[INFO] at at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(Unknown Source)
[INFO] at ... 14 common frames omitted
[INFO] Caused by: java.lang.ClassNotFoundException: de.siegmar.logbackgelf.GelfTcpAppender
[INFO] at at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
[INFO] at at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
[INFO] at at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
[INFO] at ... 17 common frames omitted

Logback.xml Code:



%-30(%d %level)- %msg%n%ex

            <appender name="GELF" class="de.siegmar.logbackgelf.GelfTcpAppender">
                            <graylogHost>127.0.0.1</graylogHost>
                            <graylogPort>12201</graylogPort>
            </appender>
            <appender name="ASYNC-GELF" class="ch.qos.logback.classic.AsyncAppender">
                            <neverBlock>true</neverBlock>
                            <appender-ref ref="GELF" />
            </appender>
            <root level="${LOG_LEVEL:-INFO}">
                            <appender-ref ref="${LOG_APPENDER:-CONSOLE}" />
            </root>

Dependencies Used in pom.xml:

de.siegmar logback-gelf 2.0.0

Java Version Used: 11

[NehaK214]

FYI we have also tried updating logback-gelf version to 4.0.2 however we are getting the same issue

[osiegmar]

The root cause of your stacktrace says "Caused by: java.lang.ClassNotFoundException: de.siegmar.logbackgelf.GelfTcpAppender".

So it seems that the logback-gelf library is missing from your runtime classpath as that class is clearly part of the library.