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From Mikael Ståldal (JIRA) <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1025) Custom java.util.logging.Level gives null Log4j Level
Date Mon, 01 Jun 2015 16:41:17 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14567548#comment-14567548
] 

Mikael Ståldal commented on LOG4J2-1025:
----------------------------------------

I think we have a potential thread safety issue on the julToLog4j map now.

> Custom java.util.logging.Level gives null Log4j Level
> -----------------------------------------------------
>
>                 Key: LOG4J2-1025
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1025
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: JUL adapter
>    Affects Versions: 2.3
>            Reporter: Mikael Ståldal
>         Attachments: LOG4J2-1025.patch
>
>
> I use a 3rd party library which uses custom non-standard java.util.logging.Level.
> The Log4j JUL adapter will emit log event with level set to null in that case, which
causes NullPointerException in a Log4j filter further on.
> This is not acceptable. When encountering an unrecognised JUL Level, the JUL adapter
should either: 
> - emit some default Log4j Level
> - throw an Exception with a clear error message immediately
> - silently discard the log event
> - discard the log event and log a warning to the StatusLogger
> {code}
>  java.lang.NullPointerException
>         at org.apache.logging.log4j.Level.isMoreSpecificThan(Level.java:163)
>         at org.apache.logging.log4j.core.filter.BurstFilter.filter(BurstFilter.java:129)
>         at org.apache.logging.log4j.core.filter.BurstFilter.filter(BurstFilter.java:101)
>         at org.apache.logging.log4j.core.Logger$PrivateConfig.filter(Logger.java:295)
>         at org.apache.logging.log4j.core.Logger.isEnabled(Logger.java:122)
>         at org.apache.logging.log4j.spi.ExtendedLoggerWrapper.isEnabled(ExtendedLoggerWrapper.java:87)
>         at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:699)
>         at org.apache.logging.log4j.jul.WrappedLogger.log(WrappedLogger.java:50)
>         at org.apache.logging.log4j.jul.ApiLogger.log(ApiLogger.java:106)
> {code}



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