Christoph Kaser created LOG4J2-2760:
---------------------------------------

             Summary: RollingFileAppender with DirectWriteRolloverStrategy does 
not work with HtmlLayout
                 Key: LOG4J2-2760
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2760
             Project: Log4j 2
          Issue Type: Bug
          Components: Appenders
            Reporter: Christoph Kaser


When I try to use the RollingFileAppender with a DirectWriteRolloverStrategy 
and a HtmlLayout, I encountered a bug: The first file that is written does not 
start with the header from the layout.

If I try to specify append=false to work around that issue, I encountered a 
NullPointerException instead:
{noformat}
java.lang.NullPointerException
 at java.io.File.<init>(File.java:277)
 at 
org.apache.logging.log4j.core.appender.FileManager.createOutputStream(FileManager.java:140)
 at 
org.apache.logging.log4j.core.appender.OutputStreamManager.getOutputStream(OutputStreamManager.java:166)
 at 
org.apache.logging.log4j.core.appender.OutputStreamManager.<init>(OutputStreamManager.java:95)
 at 
org.apache.logging.log4j.core.appender.FileManager.<init>(FileManager.java:72)
 at 
org.apache.logging.log4j.core.appender.rolling.RollingFileManager.<init>(RollingFileManager.java:98)
 at 
org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:627)
 at 
org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:588)
 at 
org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:113)
 at 
org.apache.logging.log4j.core.appender.OutputStreamManager.getManager(OutputStreamManager.java:114)
 at 
org.apache.logging.log4j.core.appender.rolling.RollingFileManager.getFileManager(RollingFileManager.java:163)
 at 
org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:142){noformat}
I will create a PR in github with a TestCase and a fix and attach it to this 
bug report.



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