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HDFS, mail # user - Re: Hadoop 2.2.0 from source configuration

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Re: Hadoop 2.2.0 from source configuration
Akira AJISAKA 2013-12-02, 18:46
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.

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


(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