[LOG4J2-1482] Improper header in CsvParameterLayout

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.2
• Fix Version/s: 2.7
• Component/s: Core
• External issue URL: http://stackoverflow.com/questions/38564611/csvparameterlayout-generating-incorrect-header-on-rollover-in-log4j2
• Assignee: Unassigned
• Reporter: Sumit Singhal
• Created: 27/Jul/16 05:41
• Updated: 04/Aug/16 14:47
• Resolved: 03/Aug/16 22:21

Description

The header and first record are coming in first line in case of CsvParameterLayout. This messes up the header for the first file as well as for the subsequent files. And if we use line separator as part of header, the first file seems ok but the first record in subsequent files comes out to be empty with only commas.

Copied from the SO post:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn" name="MyApp" packages="">
    <Properties>
        <Property name="audit-path">D:/watcher</Property>
        <Property name="file-name">audit</Property>
        <Property name="file-header">param1,param2,param3</Property>
    </Properties>

    <Appenders>
    <RollingFile name="auditfile"
        fileName="${audit-path}/${file-name}.tmp" filePattern="${audit-path}/${file-name}-%d{yyyy-MM-dd}-%i.csv">
        <CsvParameterLayout delimiter="," header="${file-header}">
        </CsvParameterLayout>
        <Policies>
            <SizeBasedTriggeringPolicy size="80 B" />
        </Policies>
        <DefaultRolloverStrategy max="2"/>
    </RollingFile>
</Appenders>

<Loggers>
    <Root level="info">
        <AppenderRef ref="auditfile" />
    </Root>
</Loggers>