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Date: Tue, 03 Dec 2013 03:46:43 +0900
From: Akira AJISAKA <ajisakaa@oss.nttdata.co.jp>
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To: user@hadoop.apache.org
Subject: Re: Hadoop 2.2.0 from source configuration
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Hi Daniel,

I agree with you that 2.2 documents are very unfriendly.
In many documents, the change in 2.2 from 1.x is just a format.
There are still many documents to be converted. (ex. Hadoop Streaming)
Furthermore, there are a lot of dead links in documents.

I've been trying to fix dead links, convert 1.x documents, and update 
deprecated instructions.
   https://issues.apache.org/jira/browse/HADOOP-9982
   https://issues.apache.org/jira/browse/MAPREDUCE-5636

I'll file a JIRA and try to update Single Node Setup document.

Thanks,
Akira

(2013/12/03 1:44), Daniel Savard wrote:
> André,
>
> 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.hdfs.server.blockmanagement.BlockManager.chooseTarget(BlockManager.java:1384)
>      at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:2477)
>      at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:555)
>      at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:387)
>      at
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:59582)
>      at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
>      at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
>      at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2048)
>      at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2044)
>      at java.security.AccessController.doPrivileged(Native Method)
>      at javax.security.auth.Subject.doAs(Subject.java:415)
>      at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
>      at org.apache.hadoop.ipc.Server$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
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
>      at com.sun.proxy.$Proxy9.addBlock(Unknown Source)
>      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>      at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>      at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>      at java.lang.reflect.Method.invoke(Method.java:606)
>      at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:186)
>      at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
>      at com.sun.proxy.$Proxy9.addBlock(Unknown Source)
>      at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:330)
>      at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1226)
>      at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1078)
>      at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:514)
>
> 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
> <mailto: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 <mailto: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 <mailto:andre@concurrentinc.com>
>     http://concurrentinc.com
>
>