Hello Kumar,
here are the answers to your questions:

> 1. What version and vendor of JDK did you use to compile and package hadoop?

Answer:
I didn't compile the package since I followed the instructions in the official documentation (http://hadoop.apache.org/docs/r1.1.0/single_node_setup.html). They were no talk about compiling the code first.
By the way I am using the binary version I downloaded from the official download site. I guess this one is already compiled.

> 2. What version and vendor of JVM are you running? You can type java -version from the console to see this.

Answer:
This is the java version I am using:

java version "1.6.0"
Java(TM) SE Runtime Environment (build pxz6460sr10fp1-20120321_01(SR10 FP1))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux s390x-64 jvmxz6460sr10fp1-20120202_101568 (JIT enabled, AOT enabled)
J9VM - 20120202_101568
JIT  - r9_20111107_21307ifx1
GC   - 20120202_AA)
JCL  - 20120320_01

Thank you in advance.

Cheers, Emile
-------- Original-Nachricht --------
> Datum: Tue, 11 Dec 2012 08:56:24 -0600
> Von: Kumar Ravi <[EMAIL PROTECTED]>
> An: [EMAIL PROTECTED]
> Betreff: Re: using hadoop on zLinux (Linux on S390)

> Hi Emile,
>
>  I have a couple of questions for you:
>
> 1. What version and vendor of JDK did you use to compile and package
> hadoop?
>
> 2. What version and vendor of JVM are you running? You can type java
> -version from the console to see this.
>
> Thanks,
> Kumar
>
> Kumar Ravi
> IBM Linux Technology Center
>
>
>
>
> From:
> "Emile Kao" <[EMAIL PROTECTED]>
> To:
> [EMAIL PROTECTED],
> Date:
> 12/11/2012 08:51 AM
> Subject:
> Re: using hadoop on zLinux (Linux on S390)
>
>
> No, this is the general available version...
>
> -------- Original-Nachricht --------
> > Datum: Tue, 11 Dec 2012 08:31:57 -0600
> > Von: Michael Segel <[EMAIL PROTECTED]>
> > An: [EMAIL PROTECTED]
> > Betreff: Re: using hadoop on zLinux (Linux on S390)
>
> > Well, on the surface....
> >
> > It looks like its either a missing class, or you don't have your class
> > path set up right.
> >
> > I'm assuming you got this version of Hadoop from IBM, so I would suggest
> > contacting their support and opening up a ticket.
> >
> >
> > On Dec 11, 2012, at 8:23 AM, Emile Kao <[EMAIL PROTECTED]> wrote:
> >
> > > Hello community,
> > > I am trying to use hadoop 1.1.0 on a SLES 11 (zLinux) running on IBM
> > S390.
> > > The java provided is "java-s390x-60" 64Bit.
> > > While trying to format the namenode I got the following error:
> > >
> > > $:/opt/flume_hadoop/hadoop-1.1.0> bin/hadoop namenode -format
> > > 12/12/11 14:16:31 INFO namenode.NameNode: STARTUP_MSG:
> > > /************************************************************
> > > STARTUP_MSG: Starting NameNode
> > > STARTUP_MSG:   host = xxxxxxxxx
> > > STARTUP_MSG:   args = [-format]
> > > STARTUP_MSG:   version = 1.1.0
> > > STARTUP_MSG:   build > > https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.1 -r
> 1394289; compiled by 'hortonfo' on Thu Oct  4 22:06:49
> > UTC 2012
> > > ************************************************************/
> > > Re-format filesystem in /opt/hadoop_data/name ? (Y or N) Y
> > > 12/12/11 14:16:34 INFO util.GSet: VM type       = 64-bit
> > > 12/12/11 14:16:34 INFO util.GSet: 2% max memory = 20.0 MB
> > > 12/12/11 14:16:34 INFO util.GSet: capacity      = 2^21 = 2097152
> entries
> > > 12/12/11 14:16:34 INFO util.GSet: recommended=2097152, actual=2097152
> > > 12/12/11 14:16:34 ERROR security.UserGroupInformation: Unable to find
> > JAAS classes:com.ibm.security.auth.LinuxPrincipal
> > > 12/12/11 14:16:35 ERROR namenode.NameNode: java.io.IOException:
> failure
> > to login
> > >        at
> >
> org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:501)
> > >        at
> >
> org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:463)
> > >        at
> >
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setConfigurationParameters(FSNamesystem.java:491)