Issues with bridge API while migrating to log4j 2

Hi,
    We are migrating to log4j2 from log4j1. We are using bridge API. I am finding issues with bridge API when I tried migrate.

Log4j.xml

<appender name="FILE" class="org.apache.log4j.rolling.RollingFileAppender">
        <param name="Append" value="true"/>
        <rollingPolicy class="org.apache.log4j.rolling.FixedWindowRollingPolicy">
            <param name="FileNamePattern" value="${app.home.dir}/logs/app.log.%i"/>
            <param name="ActiveFileName" value="${app.home.dir}/logs/app.log"/>
            <param name="MaxIndex" value="13" />
        </rollingPolicy>
        <triggeringPolicy class="org.apache.log4j.rolling.SizeBasedTriggeringPolicy">
            <param name="maxFileSize" value="3145728" />
        </triggeringPolicy>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %-5p [%t] [%X{logCorId}] %c - %m%n"/>
        </layout>
    </appender>

For this, bridge API is not recognizing the class, “org.apache.log4j.rolling.RollingFileAppender”
I changed the class to "org.apache.log4j.RollingFileAppender" to make it work.

New log4j.xml

<appender name=" FILE" class="org.apache.log4j.RollingFileAppender">
        <param name="Append" value="true"/>
                                         <param name="FileNamePattern" value="app.log.%i" />
                                         <param name="ActiveFileName" value="logs/app.log" />
            <param name="MaxBackupIndex" value="13" />
                                         <param name="MaxFileSize" value="3072" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %-5p [%t] [%X{logCorId}] %c - %m%n"/>
        </layout>
    </appender>

After the changes into log4j.xml as mentioned above logs started printing into log file. But the rolling over of file is causing issue. File name I needed is app.log, app.log.1, app.log.2 so on…

Issue1: But roll over file name is just having app<Date>.log while we want  filename as app.log, app.log.1, app.log.2…
Issue2: org.apache.log4j.rolling.RollingFileAppender class is not supported by bridge API
Issue3: When added <param name="File" value="logs/app.log.%i" /> instead of <param name="ActiveFileName" value="logs/app.log" />

The rolling file name is created with app.log.1, app.log.2…
But the first file name is app.log.%i instead of app.log

How can we address these issues? I appreciate your time to look into these issues.

Regards,
Pavithra

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