[jira] [Resolved] (LOG4J2-2956) Using log4j-spring-cloud-config-client and DynamicThresholdFilter cause Could not initialize class org.apache.logging.log4j.core.impl.ContextDataFactoryException

["Ralph Goers (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LOG4J2-2956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ralph Goers resolved LOG4J2-2956.
---------------------------------
    Fix Version/s: 2.18.0
       Resolution: Fixed

> Using log4j-spring-cloud-config-client and DynamicThresholdFilter cause Could not initialize class org.apache.logging.log4j.core.impl.ContextDataFactoryException
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: LOG4J2-2956
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-2956
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Spring
>    Affects Versions: 2.13.3
>            Reporter: Rafał Figas
>            Priority: Major
>             Fix For: 2.18.0
>
>
> Assumptions:
>  # Application is a Spring Boot app.
>  # {{It is configured to use spring-boot-starter-log4j2}}
> {{There is a log4j2.cfg.xml provided through logging.config property and it is working fine. It contains following part:}}
>  
> {noformat}
> <DynamicThresholdFilter key="X-Log-Level" onMatch="ACCEPT" onMismatch="NEUTRAL">   
>  <DefaultThreshold>INFO</DefaultThreshold>
>  <KeyValuePair key="DEBUG" value="DEBUG" />
>  <KeyValuePair key="TRACE" value="TRACE" />
> </DynamicThresholdFilter>{noformat}
> {{However when dependency log4j-spring-cloud-config-client is added application does not start with following exception:}}
> {noformat}
> Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.apache.logging.log4j.core.impl.ContextDataFactoryException in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.apache.logging.log4j.core.impl.ContextDataFactory 
> at org.apache.logging.log4j.core.impl.ThreadContextDataInjector$ForDefaultThreadContextMap.rawContextData(ThreadContextDataInjector.java:137) 
> at org.apache.logging.log4j.core.filter.DynamicThresholdFilter.currentContextData(DynamicThresholdFilter.java:162) 
> at org.apache.logging.log4j.core.filter.DynamicThresholdFilter.filter(DynamicThresholdFilter.java:152) at org.apache.logging.log4j.core.Logger$PrivateConfig.filter(Logger.java:609) 
> at org.apache.logging.log4j.core.Logger.isEnabled(Logger.java:258) at org.apache.logging.log4j.spi.AbstractLogger.isEnabled(AbstractLogger.java:1513) 
> at org.apache.commons.logging.LogAdapter$Log4jLog.isErrorEnabled(LogAdapter.java:175) at org.springframework.boot.SpringApplication.reportFailure(SpringApplication.java:836) 
> at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:812) at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) 
> at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) 
> at pl.frati.moray.configserver.ConfigServerApplication.main(ConfigServerApplication.java:12)
> {noformat}
> First of all I have no idea what is missing. Without mentioned dependency application startup is correct. Also, removing DynamicThresholdFilter solves the problem as well.
> Second of all it seems that exception message is somewhat broken, because it does not say anything about what class is missing. I've tried to debug this, but class ContextDataFactory is pretty hard to debug. Fix in exception message should ease the hunt.
>  



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