Reputation: 607

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName

I know there have been many posts regarding this exception, but I am not able to fix this issue. Classpath has to be edited I think to resolve it. I am trying to run a program called DistMap in hadoop infrastructure. This is the error I am getting.

Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.util.PlatformName
        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)
Could not find the main class: org.apache.hadoop.util.PlatformName.  Program will exit.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FsShell
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FsShell
        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)
Could not find the main class: org.apache.hadoop.fs.FsShell.  Program will exit.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.util.PlatformName
        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)
Could not find the main class: org.apache.hadoop.util.PlatformName.  Program will exit.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FsShell
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FsShell
        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)
Could not find the main class: org.apache.hadoop.fs.FsShell.  Program will exit.
Error could not create input directory /distmap_output_input folder on hdfs file system

which java says

/usr/java/jdk1.6.0_32/bin/java

echo $CLASSPATH gives a blank line

cat ~/.bash_profile says

cat ~/.bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH

Update:

$HADOOP_HOME /usr/lib/hadoop

$HADOOP_CLASSPATH

/usr/lib/hadoop-0.20-mapreduce/hadoop-ant-2.0.0-mr1-cdh4.4.0.jar:/usr/lib/hadoop‌-0.20-mapreduce/hadoop-ant.jar:/usr/lib/hadoop-0.20-mapreduce/hadoop-examples-2.0‌.0-mr1-cdh4.4.0.jar:/usr/lib/hadoop-0.20-mapreduce/hadoop-examples.jar:/usr/lib/h‌adoop-0.20-mapreduce/hadoop-core.jar:/usr/lib/hadoop-0.20-mapreduce/hadoop-core-2‌.0.0-mr1-cdh4.4.0.jar:/usr/lib/hadoop-0.20-mapreduce/hadoop-test-2.0.0-mr1-cdh4.4‌.0.jar:/usr/lib/hadoop-0.20-mapreduce/hadoop-test.jar:/usr/lib/hadoop-0.20-mapreduce/hadoop-tools-2.0.0-mr1-cdh4.4.0.jar:/usr/lib/hado‌op-0.20-mapreduce/hadoop-tools.jar:/usr/lib/hadoop-0.20-mapreduce/lib/*jar:/usr/lib/hadoop/hadoop-common.jar:/usr/lib/hadoop/hadoop-common-2.0.0-cdh4.4.0.jar

The last 2 jar files have those classes PlatformName and FsShell. Still its not working.

Can anyone please help me fix this issue?

Thanks

Upvotes: 13

Answers (4)

JoeMjr2

Reputation: 3944

In my particular case, I am using Maven, and although I had hadoop-auth in both the POM and the classpath, I was still getting this exception.

What finally fixed it for me was changing the scope for the dependency in the POM from "provided" to "compile".

Upvotes: 1

TG Gowda

Reputation: 11917

If you are a maven user and faced this issue -

    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-client</artifactId>
        <version>${hadoop.client.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-common</artifactId>
        <version>${hadoop.client.version}</version>
    </dependency>

NOTE: :hadoop-client:2.5.2 alone didn't bring in all the required hadoop dependencies. That is why I added hadoop-common, which brought all the required deps.

Upvotes: 3