Hi, I have an application on Cassandra 1.0.8 + Hadoop. Previously running on the cloudera distribution hadoop-0.20.2-cdh3u1, I tried today to upgrade to Hadoop 1.0.2 but stumbled in issues with consistent job failures
The hadoop userlogs seem quite clear: 2012-04-19 18:21:09.837 java[57837:1903] Unable to load realm info from SCDynamicStore Apr 19, 2012 6:21:10 PM org.apache.hadoop.util.NativeCodeLoader <clinit> WARNING: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Apr 19, 2012 6:21:10 PM org.apache.hadoop.mapred.Child main SEVERE: Error running child : java.lang.NoClassDefFoundError: Could not initialize class org.apache.log4j.LogManager at org.apache.hadoop.mapred.TaskLog.syncLogs(TaskLog.java:334) at org.apache.hadoop.mapred.Child.main(Child.java:229) In particular, the SEVERE: Error running child : java.lang.NoClassDefFoundError: Could not initialize class org.apache.log4j.LogManager seem to be the most reasonable cause. Can you help me troubleshoot the cause of the failure? Thanks, -- Filippo Diotalevi
