[jira] [Created] (LOG4J2-2027) File appenders fail to configure when using a header with createOnDemand=true

["Paul Burrowes (JIRA)" <ji...@apache.org>]

Paul Burrowes created LOG4J2-2027:
-------------------------------------

             Summary: File appenders fail to configure when using a header with createOnDemand=true
                 Key: LOG4J2-2027
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2027
             Project: Log4j 2
          Issue Type: Bug
          Components: Appenders
    Affects Versions: 2.8.2
            Reporter: Paul Burrowes
            Priority: Minor


FileManager and RollingFileManager are not completely initialised when OutputStreamManager.<init> tries to create a stream to log the header. This only occurs when append=false, createOnDemand=true and the appender has a layout with a header.

The key to the problem is that if createOnDemand=false the FileManagerFactory will create the FileOutputStream before constructing the FileManager (FileManager.java:422, RollingFIleManager.java:635). 

I suspect that the DirectWriteStrategy may be vulnerable to this too.

RandomAccessFileManager is not affected by this because it does not support createOnDemand.

For example
{code}
<RollingFile fileName="test.log" filePattern="test.log.%i" append="false" createOnDemand="true">
    <PatternLayout pattern="%d %m" header="Test header"/>
</RollingFile>
{code}

Stack trace of the failure showing that OutputStreamManager is trying to write the header in an incompletely constructed FileManager.
{code}
2017-09-01 17:09:36.016+1200 ERROR   [log4j.status] <GroupRMI-thread-1> {} Unable to inject fields into builder class for plugin type class org.apache.logging.log4j.core.appender.RollingFileAppender, element RollingFile.
java.lang.NullPointerException: name can't be null
        at java.io.FilePermission.init(FilePermission.java:191)
        at java.io.FilePermission.<init>(FilePermission.java:277)
        at java.lang.SecurityManager.checkWrite(SecurityManager.java:979)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:200)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:133)
        at org.apache.logging.log4j.core.appender.FileManager.createOutputStream(FileManager.java:120)
        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:84)
        at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.<init>(RollingFileManager.java:111)
        at org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:593)
        at org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:554)
        at org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:112)
        at org.apache.logging.log4j.core.appender.OutputStreamManager.getManager(OutputStreamManager.java:114)
        at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.getFileManager(RollingFileManager.java:155)
        at org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:131)
        at org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:60)
        at org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:122)
        at org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:952)
        at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:892)
        at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:884)
        at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:508)
        at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:232)
        at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:244)
        at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:545)
        at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:261)
{code}



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