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https://issues.apache.org/jira/browse/LOG4J2-1158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14956018#comment-14956018
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Ralph Goers commented on LOG4J2-1158:
-------------------------------------
I think it might be a mistake to just use SimpleMessage for this. I would think
that using FormattedMessage might make more sense here. It still allows for
logEvents that expect to use MessageFormat but should avoid the exception being
complained about here.
It would be nice if there was some way to configure which MessageFactory to use.
> Log4J JUL adapter is using MessageFormat on String passed by
> java.util.function.Supplier<String>
> ------------------------------------------------------------------------------------------------
>
> Key: LOG4J2-1158
> URL: https://issues.apache.org/jira/browse/LOG4J2-1158
> Project: Log4j 2
> Issue Type: Bug
> Components: JUL adapter
> Affects Versions: 2.4, 2.4.1
> Environment: Window 7 Business 64 bit
> Java(TM) SE Runtime Environment (build 1.8.0_25-b18)
> Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
> (log4j-jul-2.4.jar, log4j-core-2.4.jar, log4j-api-2.4.jar)
> Reporter: Michael Fortin
> Assignee: Gary Gregory
> Priority: Minor
> Fix For: 2.5
>
>
> Log4J JUL is attempting to _MessageFormat_ a String passed by
> _*java.util.logging*_.Logger.info(java.util.function._Supplier_<*String*>)
> and fails with java.lang._*IllegalArgumentException*_ when the String
> contains *_{ }_*.
> In the following example, line #2 will throw an _*IllegalArgumentException*_:
> {code:java}// writing the configuration file on the fly for the purpose of
> this demo only
> try (java.io.PrintStream p = new java.io.PrintStream("./log4j-jul-test.xml"))
> {
> p.println("<Configuration/>");
> }
> // specifying the java.util.logging.LogManager implementation
> System.setProperty("java.util.logging.manager",
> "org.apache.logging.log4j.jul.LogManager");
> System.setProperty("log4j.configurationFile", "log4j-jul-test.xml");
> java.util.logging.LogManager.getLogManager().getLogger("test").severe("This
> 1st {will} be logged correctly by log4J");
> // output is: 11:15:40.492 [main] ERROR test - This 1st {will} be logged
> correctly by log4J
> java.util.logging.LogManager.getLogManager().getLogger("test").severe(() ->
> "This 2nd {will not} be logged correctly by log4J");
> // output is: 2015-10-10 11:15:40,523 main ERROR An exception occurred
> processing Appender Console java.lang.IllegalArgumentException: can't parse
> argument number: will not
> // at java.text.MessageFormat.makeFormat(MessageFormat.java:1429)
> // at java.text.MessageFormat.applyPattern(MessageFormat.java:479){code}
> See also example on http://stackoverflow.com/a/33050986/495987
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