Flume error on agent startup

[davidemalagoli]

02 Sep 2015 08:39:47,444 INFO conf-file-poller-0 - context={ parameters:{topic=recommendation-requests-92-83941, brokerList=192.168.22.5:9092, batchSize=5, type=org.apache.flume.sink.kafka.KafkaSink, channel=c_rec} }
02 Sep 2015 08:39:47,448 ERROR conf-file-poller-0 - Unhandled error
java.lang.NoSuchMethodError: org.apache.flume.instrumentation.SinkCounter.(Ljava/lang/String;[Ljava/lang/String;)V
at org.apache.flume.instrumentation.kafka.KafkaSinkCounter.(KafkaSinkCounter.java:34)
at org.apache.flume.sink.kafka.KafkaSink.configure(KafkaSink.java:218)
at org.apache.flume.conf.Configurables.configure(Configurables.java:41)
at org.apache.flume.node.AbstractConfigurationProvider.loadSinks(AbstractConfigurationProvider.java:413)
at org.apache.flume.node.AbstractConfigurationProvider.getConfiguration(AbstractConfigurationProvider.java:98)
at org.apache.flume.node.PollingPropertiesFileConfigurationProvider$FileWatcherRunnable.run(PollingPropertiesFileConfigurationProvider.java:140)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)