Activating recording will produce an exception.

FATAL: org.apache.log4j.ConsoleAppender.<init>(Lorg/apache/log4j/Layout;)V
java.lang.NoSuchMethodError: org.apache.log4j.ConsoleAppender.<init>(Lorg/apache/log4j/Layout;)V
at org.jenkinsci.plugins.vncrecorder.vncutil.VncProcess.<init>(VncProcess.java:58)
at org.jenkinsci.plugins.vncrecorder.vncutil.VncRecorder.<init>(VncRecorder.java:30)
at org.jenkinsci.plugins.vncrecorder.VncRecorderBuildWrapper.setUp(VncRecorderBuildWrapper.java:153)
at hudson.model.Build$BuildExecution.doRun(Build.java:156)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:537)
at hudson.model.Run.execute(Run.java:1741)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:381)