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https://issues.apache.org/jira/browse/HADOOP-16717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16976069#comment-16976069
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Steve Loughran commented on HADOOP-16717:
-----------------------------------------
You should be able to switch to reflection here
> Remove GenericsUtil isLog4jLogger
> ---------------------------------
>
> Key: HADOOP-16717
> URL: https://issues.apache.org/jira/browse/HADOOP-16717
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 3.2
> Reporter: David Mollitor
> Assignee: Xieming Li
> Priority: Major
>
> Remove this method:
> {code:java}
> /**
> * Determine whether the log of <code>clazz</code> is Log4j implementation.
> * @param clazz a class to be determined
> * @return true if the log of <code>clazz</code> is Log4j implementation.
> */
> public static boolean isLog4jLogger(Class<?> clazz) {
> if (clazz == null) {
> return false;
> }
> Logger log = LoggerFactory.getLogger(clazz);
> return log instanceof Log4jLoggerAdapter;
> }
> {code}
> This creates a dependency on Log4jLoggerAdapter (slf4j-log4j12) which means
> that any project which depends on hadoop-commons needs to carry this
> dependency as well. Such a simple use case and such a heavy dependency. The
> commons library should not depend on any specific implementation of SLF4J
> binding
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