I am facing one error with my evaluator filter. I included SLFJ-API(1.7.25), logback-core, logback-classic (1.2.3) jars. Also added janino jar (3.1.1).

In my logback.xml file belowis what I wrote.

<appender name="syslogappender" class="ch.qos.logback.classic.net.SyslogAppender">

<filter class=ch.qos.logback.core.filter.EvaluatorFilter">

<evaluator>

<expression>

if (level == ERROR &amp;&amp; formattedMessage.contains("NullPointerException") ) {

return true;

}

return false;

</expression>

</evaluator>

  <onMismatch> NEUTRAL</onMismatch>

<onMatch>ACCEPT</onMatch> 

</filter>

</appender>

and I amhaving sysloghost, facility and suffixpattern tags as well passed in the above appender.

my logger for the above appender is 

<logger additiity=false level="INFO">

<appender-ref ref=" syslogappender>

</logger>

<root>

<level value="INFO" />

<appender-ref ref="syslogappender"

</root>

with this above, Iam deploying my app to IBM Mainframe WAS server. During deployment I am getting below error.

org.codehaus.commons.compiler.CompileException a class ch.qos.logback.classic.Level could not be found.

Please help me how to correct this issue.

Thanks.