Hi,I cloned Kafka 0.8 and built it with Scala 2.9.2 I launched it successfully but when a message is sent, I got a huge stack trace regarding kafka_metrics For example: java.io.IOException: Unable to create kafka_metrics/kafka.server.BrokerTopicMetrics.AllTopicsBytesOutPerSec.csv at com.yammer.metrics.reporting.CsvReporter.createStreamForMetric(CsvReporter.java:145) at com.yammer.metrics.reporting.CsvReporter.getPrintStream(CsvReporter.java:271) at com.yammer.metrics.reporting.CsvReporter.access$000(CsvReporter.java:24) at com.yammer.metrics.reporting.CsvReporter$1.getStream(CsvReporter.java:161) at com.yammer.metrics.reporting.CsvReporter.processMeter(CsvReporter.java:178) at com.yammer.metrics.reporting.CsvReporter.processMeter(CsvReporter.java:24) at com.yammer.metrics.reporting.MetricDispatcher.dispatch(MetricDispatcher.java:12) at com.yammer.metrics.reporting.CsvReporter.run(CsvReporter.java:168) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680) Any ideas? Thanks for help and time.