trying to execute on Jmeter 5.5 script that returns in the log, even if it is not blocking the execution so it's just annoying :
ERROR Unable to invoke factory method in class com.blazemeter.jmeter.debugger.logging.LoggerPanelAppender for element Logger: java.lang.IllegalStateException: No factory method found for class com.blazemeter.jmeter.debugger.logging.LoggerPanelAppender java.lang.IllegalStateException: No factory method found for class com.blazemeter.jmeter.debugger.logging.LoggerPanelAppender at org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.findFactoryMethod(PluginBuilder.java:238) 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:1122) at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:1047) at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:1039) at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:651) at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:249) at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:295) at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:621) at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:694) at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:711) at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:253) at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:155) at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:47) at org.apache.logging.log4j.LogManager.getContext(LogManager.java:196) at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:137) at org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:55) at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:47) at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:33) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:363) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:388) at org.apache.jmeter.JMeter.(JMeter.java:113) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) at org.apache.jmeter.NewDriver.main(NewDriver.java:257)
Tried already running different versions of download manger (1.9, 1.6, 1.8) or other jar files. Tried also scripts with no reference except default plug-in. Still the issue is there. Jmeter log has only INFO and a few WARNS. Any ideas ?
It seems that Step-by-step debugger for Apache JMeter is producing the error.
I cannot reproduce your issue using JMeter 5.5 and BlazeMeter Step-by-step Debugger 0.6, everything works just fine so it might be the case one of "jars" you're using causing the problem.
Use vanilla latest stable JMeter (version 5.6.2 as of now) without plugins and the error should go away.
For debugging purposes you can use Debug Sampler, Debug Post-Processor and View Results Tree listener combination