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https://issues.apache.org/jira/browse/LOG4J2-2956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17532505#comment-17532505
]
ASF subversion and git services commented on LOG4J2-2956:
---------------------------------------------------------
Commit 3ae669455565276e962b34ce5fdf7fd3dc7da3c2 in logging-log4j2's branch
refs/heads/master from Ralph Goers
[ https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=3ae6694555 ]
LOG4J2-2956 - Prevent ContextDataFactory error during startup
> 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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