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https://issues.apache.org/jira/browse/LOG4J2-1688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15654263#comment-15654263
]
Stefan Hammelbeck commented on LOG4J2-1688:
-------------------------------------------
*Example code:*
{code}
package de.deutschepost.rs.zd.tv.model;
import java.util.Arrays;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.BlockJUnit4ClassRunner;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Bug description:
*
* We are using SLF4J over Log4j Version 2.7.
*
* Calling <code>org.slf4j.Logger.error(someFormat, args)</code> <b>twice</b>
with an <code>Object[] args</code> causes all elements
* of <code>args</code> to be set to <code>null</code>.
*
*/
@RunWith(BlockJUnit4ClassRunner.class)
public class CheckLog4j2Test {
@Test
public void testLog4j2() {
// Argument-array creation
int limit = 33;
Object[] args = createArray(limit);
Object[] originalArgs = Arrays.copyOf(args, args.length);
System.out.println("args " + Arrays.toString(args));
// Logger definition
String someFormat = "test {}";
Logger logger = LoggerFactory.getLogger(this.getClass());
// First logging of args
logger.error(someFormat, args); // Only the first element
(args[0]) of args will be logged - why?
Assert.assertArrayEquals(originalArgs, args);
System.out.println("args are still ok: " +
Arrays.toString(args));
// Bug: The second logging of args sets all elements of args to
null
logger.error(someFormat, args);
System.out.println("args " + Arrays.toString(args));
Assert.assertArrayEquals(originalArgs, args);
}
/**
* @param size
* @return
*/
private static Object[] createArray(int size) {
Object[] args = new Object[size];
for (int i = 0; i < args.length; i++) {
args[i] = i;
}
return args;
}
}
{code}
> 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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