[jira] [Commented] (LOG4J2-3257) MDC class in 2.17.0 has multiple "put" methods

["Gary D. Gregory (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LOG4J2-3257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17462218#comment-17462218 ] 

Gary D. Gregory commented on LOG4J2-3257:
-----------------------------------------

This class has not changed its API signature in our {{log4j-1.2-api}} jar 10 years which is when the {{put(String, String)}} method was added, so you have something else going on.

You likely have some other jar files on your classpath like a log4j 1.x jar file before {{log4j-1.2-api}}.

 

> MDC class in 2.17.0 has multiple "put" methods
> ----------------------------------------------
>
>                 Key: LOG4J2-3257
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-3257
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: log4j 1.2 emulation
>    Affects Versions: 2.17.0
>            Reporter: Mike
>            Priority: Major
>
> We use MDC.put for a variety of things.  With the 2.17 version, it appears there is a bug.
> When including the jar from maven, we can see the following:
>  
> {code:java}
> private MDC() {
> }
> public static void put(final String key, final String value) {
>     localMap.get().put(key, value);
>     ThreadContext.put(key, value);
> }
> public static void put(final String key, final Object value) {
>     localMap.get().put(key, value);
>     ThreadContext.put(key, value.toString());
> } {code}
> Java is very unhappy when trying to call this, and causes problems in our application.
> The error we are getting is:
> {code:java}
> SEVERE: Servlet.service() for servlet [default] in context with path [] threw exception [Filter execution threw an exception] with root cause
> java.lang.NoSuchMethodError: org.apache.log4j.MDC.put(Ljava/lang/String;Ljava/lang/String;)V {code}
> I have reverted back to 2.16.0 for the time being and we aren't having problems.



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