tHDFSOutput Error: File ... could only be replicated to 0 nodes

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tHDFSOutput Error: File ... could only be replicated to 0 nodes

Dear talend Community,

I am using the following software:


  • Ubuntu 16.04 LTS
  • Virtual Box 5.0.40
  • TOS_BD-20170623_1246-V6.4.1
  • HDP_2.6_virtualbox_05_05_2017_14_46_00_hdp.ova

I can successfully access the sandbox in Firefox browser using, and also


Now I want to send data from talend to the sandbox. The connection seems to work fine as I can browse the files clicking the button behind the FileName field in the Components Tab of tHDFSOutput. But running the job results in the following error:

Exception in component tHDFSOutput_1 (testHDPConnection)
org.apache.hadoop.ipc.RemoteException( File /user/raj_ops/out-2.csv could only be replicated to 0 nodes instead of minReplication (=1).  There are 1 datanode(s) running and 1 node(s) are excluded in this operation.
    at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(
    at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(
    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(
    at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$

The file is created but and I can see it using the Files View in the Sandbox. But there is no data written, it stays an empty file. After reading posts with the same error, I still don't knwo how to make this work.


Thank you in advance for helping me resolving the issue!


Re: tHDFSOutput Error: File ... could only be replicated to 0 nodes

Hello!  For a quick check, can you open the URI http://sandbox-host-name:50070/ in a browser and verify that your DataNode is healthy?


In the table, you should see Live Nodes: 1

Four Stars

Re: tHDFSOutput Error: File ... could only be replicated to 0 nodes

Thank you for your reply. I attached a screenshot where you can see what looks like on my system.



Four Stars

Re: tHDFSOutput Error: File ... could only be replicated to 0 nodes

In between I tried to debug and followed some posts:. I added the HDFS Ports to the Virtual Box (as described in the link in this post: As this didn't work I tried to use an older Sandbox version with no docker (2.4.), but still I have the same error.

In this post : there is a parameter mentioned in hdfs-default.xml, but where is hdfs-default.xml? Logging into the sandbox with  ssh root@ -p 2222 I only find hdfs-site.xml but unfortunately not containing the parameter mentioned: "dfs.client.use.datanode.hostname". Running the tHDFSOutput-job with "Use Datanode Hostname" enabled and disabled: still same error and empty file being created.


And although adding the IP (as described here: ) I still cannot open sandbox:8080 or 8088 but still only or localhost:8088. Can this be related to the error? And what did I do wrong?


Thanks for any hint!


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