Hi Folks, I'm facing an issue with HDFS starting. I installed CDH5 with 3 servers. I put 2 of them as Datanodes. When i try to launch HDFS service on datanode servers i got the error bellow (stderr):   + '[' -e /var/run/cloudera-scm-agent/process/317-hdfs-DATANODE/topology.py ']' + '[' -e /var/run/cloudera-scm-agent/process/317-hdfs-DATANODE/log4j.properties ']' + perl -pi -e 's#{{CMF_CONF_DIR}}#/var/run/cloudera-scm-agent/process/317-hdfs-DATANODE#g' /var/run/cloudera-scm-agent/process/317-hdfs-DATANODE/log4j.properties ++ find /var/run/cloudera-scm-agent/process/317-hdfs-DATANODE -maxdepth 1 -name '*.py' + OUTPUT= + '[' '' '!=' '' ']' + '[' DATANODE_MAX_LOCKED_MEMORY '!=' '' ']' + ulimit -l + export HADOOP_IDENT_STRING=hdfs + HADOOP_IDENT_STRING=hdfs + '[' -n '' ']' + acquire_kerberos_tgt hdfs.keytab + '[' -z hdfs.keytab ']' + '[' -n '' ']' + '[' validate-writable-empty-dirs = datanode ']' + '[' file-operation = datanode ']' + '[' bootstrap = datanode ']' + '[' failover = datanode ']' + '[' transition-to-active = datanode ']' + '[' initializeSharedEdits = datanode ']' + '[' initialize-znode = datanode ']' + '[' format-namenode = datanode ']' + '[' monitor-decommission = datanode ']' + '[' jnSyncWait = datanode ']' + '[' nnRpcWait = datanode ']' + '[' monitor-upgrade = datanode ']' + '[' finalize-upgrade = datanode ']' + '[' mkdir = datanode ']' + '[' nfs3 = datanode ']' + '[' namenode = datanode -o secondarynamenode = datanode -o datanode = datanode ']' + HADOOP_OPTS='-Dsecurity.audit.logger=INFO,RFAS -Djava.net.preferIPv4Stack=true ' + export 'HADOOP_OPTS=-Dhdfs.audit.logger=INFO,RFAAUDIT -Dsecurity.audit.logger=INFO,RFAS -Djava.net.preferIPv4Stack=true ' + HADOOP_OPTS='-Dhdfs.audit.logger=INFO,RFAAUDIT -Dsecurity.audit.logger=INFO,RFAS -Djava.net.preferIPv4Stack=true ' + exec /opt/cloudera/parcels/CDH-5.0.0-1.cdh5.0.0.p0.47/lib/hadoop-hdfs/bin/hdfs --config /var/run/cloudera-scm-agent/process/317-hdfs-DATANODE datanode log4j:ERROR Could not find value for key log4j.appender.EventCounter log4j:ERROR Could not instantiate appender named "EventCounter". I check the parcels folders of HDFS to see if EvenCounter as well configurer and it does... Do you know how to fix that ?   Edit: http://pastebin.com/jKwY1JXv   BR   NicolasY.   ... View more