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https://issues.apache.org/jira/browse/LOG4J2-1332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15339038#comment-15339038
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Ralph Goers commented on LOG4J2-1332:
-------------------------------------
>From what I can tell the the BNF grammar does not allow a null value for the
>message. It seems the proper behavior here would be to cause the Layout to
>log a warning and then ignore the log event.
> Null/empty messages are not handled properly in RFC5424Layout
> -------------------------------------------------------------
>
> Key: LOG4J2-1332
> URL: https://issues.apache.org/jira/browse/LOG4J2-1332
> Project: Log4j 2
> Issue Type: Bug
> Components: Layouts
> Reporter: Michael Day
> Assignee: Ralph Goers
>
> In the following code snippet, you can see that null/empty messages are not
> appended to the buffer. This results in a violation of RFC5424.
> {code}
> private void appendMessage(StringBuilder buffer, LogEvent event) {
> Message message = event.getMessage();
> String text = message instanceof
> StructuredDataMessage?message.getFormat():message.getFormattedMessage();
> if(text != null && text.length() > 0) {
> buffer.append(' ').append(this.escapeNewlines(text,
> this.escapeNewLine));
> }
> ...
> }
> {code}
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