I modified the jboss-log4j.xml file to no success.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="true">

    <!-- A time/date based rolling appender -->
    <appender name="FILE" class="org.jboss.logging.appender.DailyRollingFileAppender">
        <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
        <param name="File" value="${jboss.server.log.dir}/server.log"/>
        <param name="Append" value="true"/>

        <!-- Rollover at midnight each day -->
        <param name="DatePattern" value="'.'yyyy-MM-dd"/>

        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d{HH:mm:ss} %p [%c{6}] %m%n"/>
            <!--
            <param name="ConversionPattern" value="%d{HH:mm:ss} [%p] %c#%M@%L => %m%n"/>
            -->
        </layout>
    </appender>

    <!-- Console appender -->
    <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
        <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
        <param name="Target" value="System.out"/>
        <!--
        <param name="Threshold" value="INFO"/>
        -->
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d{HH:mm:ss} %p [%c{6}] %m%n"/>
            <!--
            <param name="ConversionPattern" value="%d{HH:mm:ss} [%p] %c#%M@%L => %m%n"/>
            -->
        </layout>
    </appender>

    <!-- digester is way too whiny (needed if root log level is INFO) -->
    <category name="org.apache.commons.digester.Digester">
        <priority value="WARN" />
    </category>

    <!-- Tell us when Seam is initializing -->
    <category name="javax.servlet.ServletContextListener">
        <priority value="INFO" />
    </category>

    <!-- Tell us which components Seam is loading -->
    <category name="org.jboss.seam.init.Initialization">
        <priority value="INFO" />
    </category>

    <!-- log SQL queries -->
    <!--
    <category name="org.hibernate.SQL">
        <priority value="DEBUG" />
    </category>
    -->

    <!-- Tell us when JBoss AS has finished starting -->
    <category name="org.jboss.system.server.Server">
        <priority value="INFO" />
    </category>

    <category name="org.open18">
        <priority value="DEBUG" />
    </category>

    <root>
        <priority value="INFO"/>
        <appender-ref ref="CONSOLE"/>
        <!--
        <appender-ref ref="FILE"/>
        -->
    </root>

</log4j:configuration>

Thanks Max. I resolved the issue-

By uncommenting out-<appender-ref ref="FILE"/>

<root>
        <priority value="INFO"/>
        <appender-ref ref="CONSOLE"/>
        <appender-ref ref="FILE"/>
    </root>