Thanks Arun, I already read and did everything recommended at the referred URL. There isn't any error message in the logfiles. The only error message appears when I try to put a non-zero file on the HDFS as posted above. Beside that, absolutely nothing in the logs is telling me something is wrong with the configuration so far.
Is there some sort of diagnostic tool that can query/ping each server to make sure it responds properly to requests? When trying to put my file, in the datanode log I see nothing, the message appears in the namenode log. Is this the expected behavior or should I see at least some kind of request message in the datanode logfile? ----------------- Daniel Savard 2013/12/2 Arun C Murthy <a...@hortonworks.com> > Daniel, > > Apologies if you had a bad experience. If you can point them out to us, > we'd be more than happy to fix it - alternately, we'd *love* it if you > could help us improve docs too. > > Now, for the problem at hand: > http://wiki.apache.org/hadoop/CouldOnlyBeReplicatedTo is one place to > look. Basically NN cannot find any datanodes. Anything in your NN logs to > indicate trouble? > > Also, pls feel free to open liras with issues you find and we'll help. > > thanks, > Arun > > On Dec 2, 2013, at 8:44 AM, Daniel Savard <daniel.sav...@gmail.com> 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 <ake...@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.sav...@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 >> an...@concurrentinc.com >> http://concurrentinc.com >> > > > -- > Arun C. Murthy > Hortonworks Inc. > http://hortonworks.com/ > > > > CONFIDENTIALITY NOTICE > NOTICE: This message is intended for the use of the individual or entity > to which it is addressed and may contain information that is confidential, > privileged and exempt from disclosure under applicable law. If the reader > of this message is not the intended recipient, you are hereby notified that > any printing, copying, dissemination, distribution, disclosure or > forwarding of this communication is strictly prohibited. If you have > received this communication in error, please contact the sender immediately > and delete it from your system. Thank You.
