size-rotating-file-handler fails with error if encoding isn't set in the configuration

<size-rotating-file-handler name="FILE2" autoflush="true">
                <level name="TRACE"/>
                <formatter>
                    <pattern-formatter pattern="%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%E%n"/>
                </formatter>
                <file relative-to="jboss.server.log.dir" path="server.log"/>
                <rotate-size value="2048"/>
                <max-backup-index value="5"/>
            </size-rotating-file-handler>

20:10:42,402 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-3) MSC00001: Failed to start service jboss.logging.handler.FILE2: org.jboss.msc.service.StartException in service jboss.logging.handler.FILE2: java.io.UnsupportedEncodingException: undefined
	at org.jboss.as.logging.SizeRotatingFileHandlerService.start(SizeRotatingFileHandlerService.java:70)
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)
	at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_21]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_21]
	at java.lang.Thread.run(Thread.java:619) [:1.6.0_21]
Caused by: java.io.UnsupportedEncodingException: undefined
	at java.util.logging.Handler.setEncoding(Handler.java:130) [:1.6.0_21]
	at org.jboss.logmanager.handlers.OutputStreamHandler.setEncoding(OutputStreamHandler.java:90) [jboss-logmanager-1.2.0.GA.jar:1.2.0.GA]
	at org.jboss.as.logging.SizeRotatingFileHandlerService.start(SizeRotatingFileHandlerService.java:68)
	... 5 more