[Hadoop-common-user] Namenode not starting

Hi abhishek,

Have you successfully installed java virtual machine like sun JDK before running Hadoop? Or maybe you forget to configure the environment variable JAVA_HOME? What is the output of the command 'java -version'?

Regards

Hailong




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* Hailong Yang, PhD. Candidate
* Sino-German Joint Software Institute,
* School of Computer Science&Engineering, Beihang University
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* Email: hailong.yang1115@gmail.com
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From: abhishek sharma
Date: 2011-09-02 03:51
To: common-user; common-dev
Subject: Namenode not starting
Hi all,

I am trying to install Hadoop (release 0.20.203) on a machine with CentOS.

When I try to start HDFS, I get the following error.

<machine-name>: Unrecognized option: -jvm
<machine-name>: Could not create the Java virtual machine.

Any idea what might be the problem?

Thanks,
Abhishek

Hi Hailong,

I have installed JDK and set JAVA_HOME correctly (as far as I know).

Output of java -version is:
java version "1.6.0_04"
Java(TM) SE Runtime Environment (build 1.6.0_04-b12)
Java HotSpot(TM) Server VM (build 10.0-b19, mixed mode)

I also have another version installed "1.6.0_27" but get same error with it.

Abhishek

On Thu, Sep 1, 2011 at 4:00 PM, hailong.yang1115
wrote:

Hi Abhishek,

Try reading through the shell scripts before postiing. They are short and
simple enough and you should be able to debug them quite easily. I've seen
the same error many times.

Do you see JAVA_HOME set when you $ssh localhost?

Also which command are you using to start the daemons?

Fight on,
Ravi

Actually, I found the reason. I am running HDFS as "root" and there is
a bug that has recently been fixed.

https://issues.apache.org/jira/browse/HDFS-1943

Thanks,
Abhishek