I am trying to have a two node cluster.
Hadoop 1.0.4

the master is under the account A
the slave is under the account B

I run into an exception when I try to start the cluster.
Here is my output

A@owner-5:~$ /home/hadoop/bin/start-all.sh
Warning: $HADOOP_HOME is deprecated.

namenode running as process 3020. Stop it first.
A@master: starting datanode, logging to
/home/hadoop/libexec/../logs/hadoop-A-datanode-owner-5.out
B@slave: Warning: $HADOOP_HOME is deprecated.
B@slave:
B@slave: starting datanode, logging to
/home/owner/hadoop//logs/hadoop-owner-datanode-owner-7.out
B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/hadoop/util/PlatformName
B@slave: Caused by: java.lang.ClassNotFoundException:
org.apache.hadoop.util.PlatformName
B@slave:     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
B@slave:     at java.security.AccessController.doPrivileged(Native Method)
B@slave:     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
B@slave:     at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
B@slave: Could not find the main class:
org.apache.hadoop.util.PlatformName.  Program will exit.
B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/hadoop/hdfs/server/datanode/DataNode
A@master: secondarynamenode running as process 3352. Stop it first.
starting jobtracker, logging to
/home/hadoop/libexec/../logs/hadoop-A-jobtracker-owner-5.out
B@slave: Warning: $HADOOP_HOME is deprecated.
B@slave:
B@slave: starting tasktracker, logging to
/home/owner/hadoop//logs/hadoop-owner-tasktracker-owner-7.out
A@master: starting tasktracker, logging to
/home/hadoop/libexec/../logs/hadoop-A-tasktracker-owner-5.out
B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/hadoop/util/PlatformName
B@slave: Caused by: java.lang.ClassNotFoundException:
org.apache.hadoop.util.PlatformName
B@slave:     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
B@slave:     at java.security.AccessController.doPrivileged(Native Method)
B@slave:     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
B@slave:     at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
B@slave: Could not find the main class:
org.apache.hadoop.util.PlatformName.  Program will exit.
B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/hadoop/mapred/TaskTracker
A@owner-5:~$

Thanks for the reply.

I am running on Linux. The problem IS the config file but since I couldn't
figure out where, I made two copies of hadoop. One where it is looking for
it, and where other nodes will be looking for it.

In my config file, everything is I have set hadoop in /home/hadoop but it
is looking for it in /home/owner/hadoop (for some processes at least) and
that was the problem.
On Tue, Mar 12, 2013 at 11:06 AM, Jean-Marc Spaggiari <
[EMAIL PROTECTED]> wrote:

> Hi Cyril,
>
> Are you running in Cygwin? Or Linux? Also, you might want to share
> your configuration files if you want someone to take a look.
>
> JM
>
> 2013/3/8 Cyril Bogus <[EMAIL PROTECTED]>:
> > I am trying to have a two node cluster.
> > Hadoop 1.0.4
> >
> > the master is under the account A
> > the slave is under the account B
> >
> > I run into an exception when I try to start the cluster.
> > Here is my output
> >
> > A@owner-5:~$ /home/hadoop/bin/start-all.sh
> > Warning: $HADOOP_HOME is deprecated.
> >
> > namenode running as process 3020. Stop it first.
> > A@master: starting datanode, logging to
> > /home/hadoop/libexec/../logs/hadoop-A-datanode-owner-5.out
> > B@slave: Warning: $HADOOP_HOME is deprecated.
> > B@slave:
> > B@slave: starting datanode, logging to
> > /home/owner/hadoop//logs/hadoop-owner-datanode-owner-7.out
> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
> > org/apache/hadoop/util/PlatformName
> > B@slave: Caused by: java.lang.ClassNotFoundException:
> > org.apache.hadoop.util.PlatformName
> > B@slave:     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> > B@slave:     at java.security.AccessController.doPrivileged(Native
> Method)
> > B@slave:     at
> java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> > B@slave:     at
> > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> > B@slave: Could not find the main class:
> org.apache.hadoop.util.PlatformName.
> > Program will exit.
> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
> > org/apache/hadoop/hdfs/server/datanode/DataNode
> > A@master: secondarynamenode running as process 3352. Stop it first.
> > starting jobtracker, logging to
> > /home/hadoop/libexec/../logs/hadoop-A-jobtracker-owner-5.out
> > B@slave: Warning: $HADOOP_HOME is deprecated.
> > B@slave:
> > B@slave: starting tasktracker, logging to
> > /home/owner/hadoop//logs/hadoop-owner-tasktracker-owner-7.out
> > A@master: starting tasktracker, logging to
> > /home/hadoop/libexec/../logs/hadoop-A-tasktracker-owner-5.out
> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
> > org/apache/hadoop/util/PlatformName
> > B@slave: Caused by: java.lang.ClassNotFoundException:
> > org.apache.hadoop.util.PlatformName
> > B@slave:     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> > B@slave:     at java.security.AccessController.doPrivileged(Native
> Method)
> > B@slave:     at
> java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> > B@slave:     at
> > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> > B@slave: Could not find the main class:
> org.apache.hadoop.util.PlatformName.
> > Program will exit.
> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
> > org/apache/hadoop/mapred/TaskTracker
> > A@owner-5:~$
> >
>

Cyril,

how did you install hadoop?
when you start hadoop ... do you start it from the location where it is
installed or from users home directory?

try setting HADOOP_HOME (its deprecated but it helps to resolve issues like
where the config files are located etc)
On Wed, Mar 13, 2013 at 7:29 PM, Cyril Bogus <[EMAIL PROTECTED]> wrote:

> Thanks for the reply.
>
> I am running on Linux. The problem IS the config file but since I couldn't
> figure out where, I made two copies of hadoop. One where it is looking for
> it, and where other nodes will be looking for it.
>
> In my config file, everything is I have set hadoop in /home/hadoop but it
> is looking for it in /home/owner/hadoop (for some processes at least) and
> that was the problem.
>
>
> On Tue, Mar 12, 2013 at 11:06 AM, Jean-Marc Spaggiari <
> [EMAIL PROTECTED]> wrote:
>
>> Hi Cyril,
>>
>> Are you running in Cygwin? Or Linux? Also, you might want to share
>> your configuration files if you want someone to take a look.
>>
>> JM
>>
>> 2013/3/8 Cyril Bogus <[EMAIL PROTECTED]>:
>> > I am trying to have a two node cluster.
>> > Hadoop 1.0.4
>> >
>> > the master is under the account A
>> > the slave is under the account B
>> >
>> > I run into an exception when I try to start the cluster.
>> > Here is my output
>> >
>> > A@owner-5:~$ /home/hadoop/bin/start-all.sh
>> > Warning: $HADOOP_HOME is deprecated.
>> >
>> > namenode running as process 3020. Stop it first.
>> > A@master: starting datanode, logging to
>> > /home/hadoop/libexec/../logs/hadoop-A-datanode-owner-5.out
>> > B@slave: Warning: $HADOOP_HOME is deprecated.
>> > B@slave:
>> > B@slave: starting datanode, logging to
>> > /home/owner/hadoop//logs/hadoop-owner-datanode-owner-7.out
>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
>> > org/apache/hadoop/util/PlatformName
>> > B@slave: Caused by: java.lang.ClassNotFoundException:
>> > org.apache.hadoop.util.PlatformName
>> > B@slave:     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>> > B@slave:     at java.security.AccessController.doPrivileged(Native
>> Method)
>> > B@slave:     at
>> java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>> > B@slave:     at
>> > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>> > B@slave: Could not find the main class:
>> org.apache.hadoop.util.PlatformName.
>> > Program will exit.
>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
>> > org/apache/hadoop/hdfs/server/datanode/DataNode
>> > A@master: secondarynamenode running as process 3352. Stop it first.
>> > starting jobtracker, logging to
>> > /home/hadoop/libexec/../logs/hadoop-A-jobtracker-owner-5.out
>> > B@slave: Warning: $HADOOP_HOME is deprecated.
>> > B@slave:
>> > B@slave: starting tasktracker, logging to
>> > /home/owner/hadoop//logs/hadoop-owner-tasktracker-owner-7.out
>> > A@master: starting tasktracker, logging to
>> > /home/hadoop/libexec/../logs/hadoop-A-tasktracker-owner-5.out
>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
>> > org/apache/hadoop/util/PlatformName
>> > B@slave: Caused by: java.lang.ClassNotFoundException:
>> > org.apache.hadoop.util.PlatformName
>> > B@slave:     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>> > B@slave:     at java.security.AccessController.doPrivileged(Native
>> Method)
>> > B@slave:     at
>> java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>> > B@slave:     at
>> > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>> > B@slave: Could not find the main class:
>> org.apache.hadoop.util.PlatformName.
>> > Program will exit.
>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
Nitin Pawar

Hi Nitin,

As part of my configuration I have set all the environment variables AND
added HADOOP_PREFIX. But the problem still persist so I will just keep the
extra copy in order to move forward.

And I start it from /home/hadoop. I have no idea why it is looking for
/home/agnik/hadoop
On Wed, Mar 13, 2013 at 10:03 AM, Nitin Pawar <[EMAIL PROTECTED]>wrote:

> or set this variable HADOOP_PREFIX to the directory where hadoop is
> installed.
>
>
> On Wed, Mar 13, 2013 at 7:32 PM, Nitin Pawar <[EMAIL PROTECTED]>wrote:
>
>> Cyril,
>>
>> how did you install hadoop?
>> when you start hadoop ... do you start it from the location where it is
>> installed or from users home directory?
>>
>> try setting HADOOP_HOME (its deprecated but it helps to resolve issues
>> like where the config files are located etc)
>>
>>
>> On Wed, Mar 13, 2013 at 7:29 PM, Cyril Bogus <[EMAIL PROTECTED]>wrote:
>>
>>> Thanks for the reply.
>>>
>>> I am running on Linux. The problem IS the config file but since I
>>> couldn't figure out where, I made two copies of hadoop. One where it is
>>> looking for it, and where other nodes will be looking for it.
>>>
>>> In my config file, everything is I have set hadoop in /home/hadoop but
>>> it is looking for it in /home/owner/hadoop (for some processes at least)
>>> and that was the problem.
>>>
>>>
>>> On Tue, Mar 12, 2013 at 11:06 AM, Jean-Marc Spaggiari <
>>> [EMAIL PROTECTED]> wrote:
>>>
>>>> Hi Cyril,
>>>>
>>>> Are you running in Cygwin? Or Linux? Also, you might want to share
>>>> your configuration files if you want someone to take a look.
>>>>
>>>> JM
>>>>
>>>> 2013/3/8 Cyril Bogus <[EMAIL PROTECTED]>:
>>>> > I am trying to have a two node cluster.
>>>> > Hadoop 1.0.4
>>>> >
>>>> > the master is under the account A
>>>> > the slave is under the account B
>>>> >
>>>> > I run into an exception when I try to start the cluster.
>>>> > Here is my output
>>>> >
>>>> > A@owner-5:~$ /home/hadoop/bin/start-all.sh
>>>> > Warning: $HADOOP_HOME is deprecated.
>>>> >
>>>> > namenode running as process 3020. Stop it first.
>>>> > A@master: starting datanode, logging to
>>>> > /home/hadoop/libexec/../logs/hadoop-A-datanode-owner-5.out
>>>> > B@slave: Warning: $HADOOP_HOME is deprecated.
>>>> > B@slave:
>>>> > B@slave: starting datanode, logging to
>>>> > /home/owner/hadoop//logs/hadoop-owner-datanode-owner-7.out
>>>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
>>>> > org/apache/hadoop/util/PlatformName
>>>> > B@slave: Caused by: java.lang.ClassNotFoundException:
>>>> > org.apache.hadoop.util.PlatformName
>>>> > B@slave:     at
>>>> java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>>>> > B@slave:     at java.security.AccessController.doPrivileged(Native
>>>> Method)
>>>> > B@slave:     at
>>>> java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>>>> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>>>> > B@slave:     at
>>>> > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>>>> > B@slave:     at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>>>> > B@slave: Could not find the main class:
>>>> org.apache.hadoop.util.PlatformName.
>>>> > Program will exit.
>>>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
>>>> > org/apache/hadoop/hdfs/server/datanode/DataNode
>>>> > A@master: secondarynamenode running as process 3352. Stop it first.
>>>> > starting jobtracker, logging to
>>>> > /home/hadoop/libexec/../logs/hadoop-A-jobtracker-owner-5.out
>>>> > B@slave: Warning: $HADOOP_HOME is deprecated.
>>>> > B@slave:
>>>> > B@slave: starting tasktracker, logging to
>>>> > /home/owner/hadoop//logs/hadoop-owner-tasktracker-owner-7.out
>>>> > A@master: starting tasktracker, logging to
>>>> > /home/hadoop/libexec/../logs/hadoop-A-tasktracker-owner-5.out
>>>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
>>>> > org/apache/hadoop/util/PlatformName
>>>> > B@slave: Caused by: java.lang.ClassNotFoundException:

check your hadoop-env.sh file, set hadoop_home path correctly.

On Wed, Mar 13, 2013 at 7:51 PM, Cyril Bogus <[EMAIL PROTECTED]> wrote:

> Hi Nitin,
>
> As part of my configuration I have set all the environment variables AND
> added HADOOP_PREFIX. But the problem still persist so I will just keep the
> extra copy in order to move forward.
>
> And I start it from /home/hadoop. I have no idea why it is looking for
> /home/agnik/hadoop
>
>
> On Wed, Mar 13, 2013 at 10:03 AM, Nitin Pawar <[EMAIL PROTECTED]>wrote:
>
>> or set this variabole HADOOP_PREFIX to the directory where hadoop is
>> installed.
>>
>>
>> On Wed, Mar 13, 2013 at 7:32 PM, Nitin Pawar <[EMAIL PROTECTED]>wrote:
>>
>>> Cyril,
>>>
>>> how did you install hadoop?
>>> when you start hadoop ... do you start it from the location where it is
>>> installed or from users home directory?
>>>
>>> try setting HADOOP_HOME (its deprecated but it helps to resolve issues
>>> like where the config files are located etc)
>>>
>>>
>>> On Wed, Mar 13, 2013 at 7:29 PM, Cyril Bogus <[EMAIL PROTECTED]>wrote:
>>>
>>>> Thanks for the reply.
>>>>
>>>> I am running on Linux. The problem IS the config file but since I
>>>> couldn't figure out where, I made two copies of hadoop. One where it is
>>>> looking for it, and where other nodes will be looking for it.
>>>>
>>>> In my config file, everything is I have set hadoop in /home/hadoop but
>>>> it is looking for it in /home/owner/hadoop (for some processes at least)
>>>> and that was the problem.
>>>>
>>>>
>>>> On Tue, Mar 12, 2013 at 11:06 AM, Jean-Marc Spaggiari <
>>>> [EMAIL PROTECTED]> wrote:
>>>>
>>>>> Hi Cyril,
>>>>>
>>>>> Are you running in Cygwin? Or Linux? Also, you might want to share
>>>>> your configuration files if you want someone to take a look.
>>>>>
>>>>> JM
>>>>>
>>>>> 2013/3/8 Cyril Bogus <[EMAIL PROTECTED]>:
>>>>> > I am trying to have a two node cluster.
>>>>> > Hadoop 1.0.4
>>>>> >
>>>>> > the master is under the account A
>>>>> > the slave is under the account B
>>>>> >
>>>>> > I run into an exception when I try to start the cluster.
>>>>> > Here is my output
>>>>> >
>>>>> > A@owner-5:~$ /home/hadoop/bin/start-all.sh
>>>>> > Warning: $HADOOP_HOME is deprecated.
>>>>> >
>>>>> > namenode running as process 3020. Stop it first.
>>>>> > A@master: starting datanode, logging to
>>>>> > /home/hadoop/libexec/../logs/hadoop-A-datanode-owner-5.out
>>>>> > B@slave: Warning: $HADOOP_HOME is deprecated.
>>>>> > B@slave:
>>>>> > B@slave: starting datanode, logging to
>>>>> > /home/owner/hadoop//logs/hadoop-owner-datanode-owner-7.out
>>>>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
>>>>> > org/apache/hadoop/util/PlatformName
>>>>> > B@slave: Caused by: java.lang.ClassNotFoundException:
>>>>> > org.apache.hadoop.util.PlatformName
>>>>> > B@slave:     at
>>>>> java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>>>>> > B@slave:     at java.security.AccessController.doPrivileged(Native
>>>>> Method)
>>>>> > B@slave:     at
>>>>> java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>>>>> > B@slave:     at
>>>>> java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>>>>> > B@slave:     at
>>>>> > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>>>>> > B@slave:     at
>>>>> java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>>>>> > B@slave: Could not find the main class:
>>>>> org.apache.hadoop.util.PlatformName.
>>>>> > Program will exit.
>>>>> > B@slave: Exception in thread "main" java.lang.NoClassDefFoundError:
>>>>> > org/apache/hadoop/hdfs/server/datanode/DataNode
>>>>> > A@master: secondarynamenode running as process 3352. Stop it first.
>>>>> > starting jobtracker, logging to
>>>>> > /home/hadoop/libexec/../logs/hadoop-A-jobtracker-owner-5.out
>>>>> > B@slave: Warning: $HADOOP_HOME is deprecated.
>>>>> > B@slave:
>>>>> > B@slave: starting tasktracker, logging to
>>>>> > /home/owner/hadoop//logs/hadoop-owner-tasktracker-owner-7.out
>>>>> > A@master: starting tasktracker, logging to