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Exception in thread "main" java.lang.ClassNotFoundException: orienit.hadoop.training.sed

Exception in thread "main" java.lang.ClassNotFoundException: orienit.hadoop.training.sed
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)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:266)
at org.apache.hadoop.util.RunJar.main(RunJar.java:153)
running this in ubuntu......
in terminal my cmd is :hadoop jar /home/hadoop/work/testhadoop.jar orienit.hadoop.training.sed /words /sed

command should be like this:
hadoop jar /home/hadoop/work/testhadoop.jar orienit.hadoop.training.sed.SedJob /words /sed
your are missing the ClassName after the package

HADOOP_CLASSPATH issue while running jar

I have created an map-red job which uses the apache-commons-cli library shipped with the hadoop under $HADOOP_HOME/lib/.
Now, if I create a jar and then try to run my job using
./hadoop -jar myjob.jar
I get the below exception:
Warning: $HADOOP_HOME is deprecated.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cli/CommandLineParser
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2521)
at java.lang.Class.getMethod0(Class.java:2764)
at java.lang.Class.getMethod(Class.java:1653)
at sun.launcher.LauncherHelper.getMainMethod(LauncherHelper.java:494)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:486)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli.CommandLineParser
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357
I can see that common-cli-xxx.jar is present in my $HADOOP_HOME/lib dir. I don't know what wrong I am doing here.

Type just hadoop in your terminal if it does not show list of all the hadoop command,
you can check whether
export PATH=$PATH:$HADOOP_HOME/bin
export HADOOP_HOME=/usr/local/hadoop
lines are added to your .bashrc

MySQL Connector Classpath

my $CLASSPATH skills are not too great and I am having trouble setting up mysql-connector to use my MySQLAccess class. I compiled and put MySQLAccess class inside the same directory as my-sql-connector.jar Here is my code:
java -classpath :/home/rick/Downloads/mysql-connector-java-5.1.22/mysql-connector-java-5.1.22-bin.jar MySQLAccess
Exception in thread "main" java.lang.NoClassDefFoundError: MySQLAccess
Caused by: java.lang.ClassNotFoundException: MySQLAccess
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: MySQLAccess. Program will exit.

put a . that indicate current location also
java -classpath /home/rick/Downloads/mysql-connector-java-5.1.22/mysql-connector-java-5.1.22-bin.jar:. MySQLAccess

NoClassDefFoundError error on Mac with NetBeans

I am getting a NoClassDefFoundError error when I run my program. Here is the stack trace:
Exception in thread "main" java.lang.NoClassDefFoundError: ex7/Ex7
Caused by: java.lang.ClassNotFoundException: ex7.Ex7
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Java Result: 1
How do I fix this? I'm on a Mac and running NetBeans.

It seems class Ex7class from package ex7 isn't in classpath. recheck the class try clean build

java.lang.NoClassDefFoundError

i am geting following error
Am i missing some jar file?
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.slf4j.impl.JCLLoggerFactory.getLogger(JCLLoggerFactory.java:69)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:243)
at org.smslib.helper.Logger.<init>(Logger.java:34)
at org.smslib.Service.<init>(Service.java:93)
at SendMessage.doIt(SendMessage.java:28)
at SendMessage.main(SendMessage.java:82)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at sun.misc.Launcher$ExtClassLoader.findClass(Launcher.java:229)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 6 more
Java Result: 1

Yes, you need the Apache Logging JAR file on your classpath. Download it here: http://commons.apache.org/downloads/download_logging.cgi

Adding the jar files to ant lib will make them available for ant's java process and not your applications java process. Setting your application's classpath correctly must work.