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http://issues.apache.org/bugzilla/show_bug.cgi?id=38993

           Summary: FileAppender#setFile() NPE when BufferedIO=true
           Product: Log4j
           Version: 1.3alpha
          Platform: All
        OS/Version: Windows XP
            Status: NEW
          Severity: regression
          Priority: P2
         Component: Appender
        AssignedTo: log4j-dev@logging.apache.org
        ReportedBy: [EMAIL PROTECTED]


Version 1.3 Alpha 8.
This works in 1.3 Alpha 7.

You get an NPE when a FileAppender's BufferedIO is set to true. For example:

log4j.appender.TextFile=org.apache.log4j.FileAppender
log4j.appender.TextFile.Append=false
log4j.appender.TextFile.BufferedIO=true
log4j.appender.TextFile.File=${java.io.tmpdir}/log/ais.log
log4j.appender.TextFile.ImmediateFlush=true
log4j.appender.TextFile.layout=org.apache.log4j.PatternLayout
log4j.appender.TextFile.layout.ConversionPattern=%d{ISO8601} [%t] %-5p: %m%n

Gives:

java.lang.NullPointerException
        at java.io.Writer.<init>(Writer.java:70)
        at java.io.BufferedWriter.<init>(BufferedWriter.java:83)
        at org.apache.log4j.FileAppender.setFile(FileAppender.java:287)
        at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:155)
        at
org.apache.log4j.PropertyConfigurator.activateOptions(PropertyConfigurator.java:703)
        at
org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:692)
        at
org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:625)
        at
org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:503)
        at 
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:385)
        at 
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:320)
        at 
org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:326)

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