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From Daniel Savard <daniel.sav...@gmail.com>
Subject Re: Hadoop 2.2.0 from source configuration
Date Mon, 02 Dec 2013 16:44:24 GMT

good for you that greedy instructions on the reference page were enough to
setup your cluster. However, read them again and see how many assumptions
are made into them about what you are supposed to already know and should
come without saying more about it.

I did try the single node setup, it is worst than the cluster setup
regarding the instructions. You are supposed to already have a near working
system as far as I understand the instructions. It is assumed the HDFS is
already setup and working properly. Try to find the instructions to setup
HDFS for version 2.2.0 and you will end up with a lot of inappropriate
instructions about previous version (some properties were renamed).

It may appear hard at people to say this is toxic, but it is. The first
place a newcomer will go is setup a single node. This will be his starting
point and he will be left with a bunch of a priori and no clue.

To go back to my very problem at this point:

13/12/02 11:34:07 WARN hdfs.DFSClient: DataStreamer Exception
org.apache.hadoop.ipc.RemoteException(java.io.IOException): File
/test._COPYING_ could only be replicated to 0 nodes instead of
minReplication (=1).  There are 1 datanode(s) running and no node(s) are
excluded in this operation.
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2048)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2044)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2042)

    at org.apache.hadoop.ipc.Client.call(Client.java:1347)
    at org.apache.hadoop.ipc.Client.call(Client.java:1300)
    at com.sun.proxy.$Proxy9.addBlock(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.sun.proxy.$Proxy9.addBlock(Unknown Source)

I can copy an empty file, but as soon as its content is non-zero I am
getting this message. Searching on the message is of no help so far.

And I skimmed through the cluster instructions and found nothing there that
could help in any way neither.

Daniel Savard

2013/12/2 Andre Kelpe <akelpe@concurrentinc.com>

> Hi Daniel,
> first of all, before posting to a mailing list, take a deep breath and
> let your frustrations out. Then write the email. Using words like
> "crappy", "toxicware", "nightmare" are not going to help you getting
> useful responses.
> While I agree that the docs can be confusing, we should try to stay
> constructive. You haven't  mentioned which documentation you are
> using. I found the cluster tutorial sufficient to get me started:
> http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/ClusterSetup.html
> If you are looking for an easy way to spin up a small cluster with
> hadoop 2.2, try the hadoop2 branch of this vagrant setup:
> https://github.com/fs111/vagrant-hadoop-cluster/tree/hadoop2
> - André
> On Mon, Dec 2, 2013 at 5:34 AM, Daniel Savard <daniel.savard@gmail.com>
> wrote:
> > I am trying to configure hadoop 2.2.0 from source code and I found the
> > instructions really crappy and incomplete. It is like they were written
> to
> > avoid someone can do the job himself and must contract someone else to
> do it
> > or buy a packaged version.
> >
> > It is about three days I am struggling with this stuff with partial
> success.
> > The documentation is less than clear and most of the stuff out there
> apply
> > to earlier version and they haven't been updated for version 2.2.0.
> >
> > I was able to setup HDFS, however I am still unable to use it. I am
> doing a
> > single node installation and the instruction page doesn't explain
> anything
> > beside telling you to do this and that without documenting what each
> thing
> > is doing and what choices are available and what guidelines you should
> > follow. There is even environment variables you are told to set, but
> nothing
> > is said about what they mean and to which value they should be set. It
> seems
> > it assumes prior knowledge of everything about hadoop.
> >
> > Anyone knows a site with proper documentation about hadoop or it's
> hopeless
> > and this whole thing is just a piece of toxicware?
> >
> > I am already looking for alternate solutions to hadoop which for sure
> will
> > be a nightmare to manage and install each time a new version, release
> will
> > become available.
> >
> > TIA
> > -----------------
> > Daniel Savard
> --
> André Kelpe
> andre@concurrentinc.com
> http://concurrentinc.com

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