Accumulo 1.4.x does not work against Hadoop 2. However, your error is different. Are you sure you have Hadoop_home pointing at the right path. If you run bin/Accumulo classpath, you should get a listing which includes a smorgasbord of Hadoop classes.
Sent from my phone, please pardon the typos and brevity. On Mar 2, 2013 11:25 AM, "jiun bookworm" <[email protected]> wrote: This may be a noob issue, but some help would be appreciated. im trying out accumulo, and i have setup zookeeper and hadoop in a single node setup when i try to start accumulo this is what i see, accumulo-1.4.2]$ ./bin/accumulo init Uncaught exception: org/apache/hadoop/io/WritableComparable java.lang.NoClassDefFoundError: org/apache/hadoop/io/WritableComparable at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:634) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) at java.net.URLClassLoader.access$000(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:212) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) at org.apache.accumulo.core.Constants.<clinit>(Constants.java:91) at org.apache.accumulo.server.util.Initialize.<clinit>(Initialize.java:99) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at org.apache.accumulo.start.classloader.AccumuloClassLoader.loadClass(AccumuloClassLoader.java:363) at org.apache.accumulo.start.classloader.AccumuloClassLoader.loadClass(AccumuloClassLoader.java:370) at org.apache.accumulo.start.Main.main(Main.java:48) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.io.WritableComparable at java.net.URLClassLoader$1.run(URLClassLoader.java:217) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) ... 17 more i have set the environement settings properly, test -z "$ACCUMULO_HOME" && export ACCUMULO_HOME=/home/me/eng/source/storage/accumulo-1.4.2 test -z "$JAVA_HOME" && export JAVA_HOME=/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/ test -z "$HADOOP_HOME" && export HADOOP_HOME=/home/me/eng/source/storage/hadoop test -z "$ZOOKEEPER_HOME" && export ZOOKEEPER_HOME=/home/me/eng/source/storage/zookeeper-3.4.5 test -z "$ACCUMULO_LOG_DIR" && export ACCUMULO_LOG_DIR=$ACCUMULO_HOME/logs what could be the issue, the hadoop im using is 2.0.3alpha.
