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https://issues.apache.org/jira/browse/LOG4J2-2341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16799746#comment-16799746
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Ralph Goers commented on LOG4J2-2341:
-------------------------------------
I don't think we want to test against Message. That interface is documented as
not being Thread safe and we have no LogEvents that implement that interface.
OTOH, ReusableMessages are documented as requiring that the be copied when used
across threads, which I believe is what is going on here.
> JsonLayout not working with AsyncLoggerContextSelector in 2.11.0
> ----------------------------------------------------------------
>
> Key: LOG4J2-2341
> URL: https://issues.apache.org/jira/browse/LOG4J2-2341
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.11.0
> Reporter: Fedor Morozov
> Assignee: Carter Kozak
> Priority: Major
> Fix For: 3.0.0, 2.11.1
>
>
> In version 2.11.0 appenders with JsonLayout don't output json when
> Log4jContextSelector is set to
> org.apache.logging.log4j.core.async.AsyncLoggerContextSelector.
> Here is a sample:
> {code:java}
> package ru.yandex.zen;
> import org.apache.log4j.Logger;
> public class LoggerSample {
> public static void main(String[] args) {
> Logger logger = Logger.getLogger("LoggerSample");
> logger.info("Message 1");
> logger.info("Message 2");
> }
> }
> {code}
> {code:java}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="WARN">
> <Appenders>
> <RandomAccessFile name="RandomAccessFile" fileName="async.log"
> immediateFlush="false" append="false">
> <JsonLayout/>
> </RandomAccessFile>
> </Appenders>
> <Loggers>
> <Root level="info">
> <AppenderRef ref="RandomAccessFile"/>
> </Root>
> </Loggers>
> </Configuration>
> {code}
> Without AsyncLoggerContextSelector the log looks like this:
> {code:java}
> ""
> ""
> {code}
> Without AsyncLoggerContextSelector:
> {code:java}
> {
> "thread" : "main",
> "level" : "INFO",
> "loggerName" : "LoggerSample",
> "message" : "Message 1",
> "endOfBatch" : false,
> "loggerFqcn" : "org.apache.log4j.Category",
> "instant" : {
> "epochSecond" : 1527061940,
> "nanoOfSecond" : 637000000
> },
> "threadId" : 1,
> "threadPriority" : 5
> }
> {
> "thread" : "main",
> "level" : "INFO",
> "loggerName" : "LoggerSample",
> "message" : "Message 2",
> "endOfBatch" : false,
> "loggerFqcn" : "org.apache.log4j.Category",
> "instant" : {
> "epochSecond" : 1527061940,
> "nanoOfSecond" : 717000000
> },
> "threadId" : 1,
> "threadPriority" : 5
> }
> {code}
> In our main application Json logger outputs the provided message in quotes,
> not just an empty string. The problem doesn't appear when using asyncRoot or
> asyncLogger.
> My dependencies:
> {code:java}
> compile 'org.apache.logging.log4j:log4j-api:2.11.0'
> compile 'org.apache.logging.log4j:log4j-core:2.11.0'
> compile "org.apache.logging.log4j:log4j-1.2-api:2.11.0"
> compile "com.fasterxml.jackson.core:jackson-core:2.9.4"
> compile "com.fasterxml.jackson.core:jackson-databind:2.9.4"
> {code}
>
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