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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=9349

WriterAppender ignoresThrowable handling reversed

           Summary: WriterAppender ignoresThrowable handling reversed
           Product: Log4j
           Version: 1.2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Appender
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


Found while creating a new GUI Appender based on WriterAppender.java.  In the 
following source code from WriterAppender.java, it looks like throwable 
information will be outputted even if the Layout does not process error 
information.  I believe the line should be:  "if(!layout.ignoresThrowable())..."

    if(layout.ignoresThrowable()) {
      String[] s = event.getThrowableStrRep();-
      if (s != null) {
        int len = s.length;
        for(int i = 0; i < len; i++) {
          this.qw.write(s[i]);
          this.qw.write(Layout.LINE_SEP);
        }
      }

Haven't tested to confirm that it will be outputted because most layouts in the 
base product ignore throwable information.  But even if the information is not 
sent, there would be a performance hit on processing something that probably 
won't be outputted by the Layout.

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