EvaluatorFilter returns OnMatch when marker is null
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Key: LBCORE-118
URL: http://jira.qos.ch/browse/LBCORE-118
Project: logback-core
Issue Type: Bug
Components: Other
Affects Versions: 0.9.17
Environment: Windows XP
Reporter: Manuel Kueblboeck
Assignee: Logback dev list
Priority: Minor
<appender name="Alert" class="ch.qos.logback.core.ConsoleAppender">
<filter class="ch.qos.logback.core.filter.EvaluatorFilter">
<evaluator name="isAlert">
<expression>marker.getName().equals("Alert")</expression>
</evaluator>
<OnMatch>ACCEPT</OnMatch>
<OnMismatch>DENY</OnMismatch>
</filter>
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>ALERT: %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} -
%msg%n</Pattern>
</layout>
</appender>
In the above example, when an event is logged without an attached marker, the
filter returns OnMatch. I would expect that it returns OnMismatch.
A work around for this issue is to change the expression to this:
<expression>marker != null &&
marker.getName().equals("Alert")</expression>
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