Michael Fortin created LOG4J2-1158:
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Summary: Log4J JUL adapter is using MessageFormat on String passed
by 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
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
Priority: Minor
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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