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https://issues.apache.org/jira/browse/LOG4J2-1688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15657150#comment-15657150
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Ralph Goers commented on LOG4J2-1688:
-------------------------------------
Based on your test this is behaving correctly. In java an array is treated
exactly the same as a variable argument list. In essence you called a method
with a definition of method("format", Object... args);. The format specified
indicates how many arguments should be printed. You would get the exact same
behavior if you called System.out.prinf("test %s", args), but not if you called
System.out.printf("test %s", Arrays.toString(args)); If you really want to
print the whole array then do
log4jLogger.error("test {}", Arrays.toString(args));
> Multiple loggings of arguments are setting these arguments to null
> ------------------------------------------------------------------
>
> Key: LOG4J2-1688
> URL: https://issues.apache.org/jira/browse/LOG4J2-1688
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.7
> Reporter: Stefan Hammelbeck
>
> We are using SLF4J over log4j Version 2.7.
> Calling {{org.slf4j.Logger.error(someFormat, args)}} *twice* with an
> {{Object[] args}} causes all elements of {{args}} to be set to {{null}}.
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