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https://issues.apache.org/jira/browse/LOG4J2-2030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16154096#comment-16154096
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Gary Gregory commented on LOG4J2-2030:
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Do you have the stack trace?
> ClassCastException: org.apache.logging.log4j.simple.SimpleLoggerContext
> cannot be cast to org.apache.logging.log4j.core.LoggerContext
> -------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LOG4J2-2030
> URL: https://issues.apache.org/jira/browse/LOG4J2-2030
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.9.0
> Reporter: jncharpin
>
> When upgrading from 2.8.2 to 2.9.0, we are facing the following exception
> when accessing the context.
> Caused by: java.lang.ClassCastException:
> org.apache.logging.log4j.simple.SimpleLoggerContext cannot be cast to
> org.apache.logging.log4j.core.LoggerContext
> at
> org.apache.logging.log4j.core.LoggerContext.getContext(LoggerContext.java:190)
> at
> org.apache.logging.log4j.core.config.Configurator.setLevel(Configurator.java:291)
> Seems like that the context factory is incorrect and defaulted to
> {{SimpleLoggerContextFactory}} because of the provider is not able to find
> the resource {{META-INF/log4j-provider.properties}} which is missing in 2.9.0
> if not wrong.
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