dfs put fails

[H3llRid0r <66...@gmx.de>]

hi,

i'm new in hadoop and im just testing it at the moment. 
i set up a cluster with 2 nodes and it seems like they are running normally,
the log files of the namenode and the datanodes dont show errors.
Firewall should be set right.
but when i try to upload a file to the dfs i get following message:

hadoop@xyz:~/hadoop$ bin/hadoop dfs -put file.txt file.txt
08/06/12 14:44:19 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.net.ConnectException: Connection refused
08/06/12 14:44:19 INFO dfs.DFSClient: Abandoning block
blk_5837981856060447217
08/06/12 14:44:28 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.net.ConnectException: Connection refused
08/06/12 14:44:28 INFO dfs.DFSClient: Abandoning block
blk_2573458924311304120
08/06/12 14:44:37 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.net.ConnectException: Connection refused
08/06/12 14:44:37 INFO dfs.DFSClient: Abandoning block
blk_1207459436305221119
08/06/12 14:44:46 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.net.ConnectException: Connection refused
08/06/12 14:44:46 INFO dfs.DFSClient: Abandoning block
blk_-8263828216969765661
08/06/12 14:44:52 WARN dfs.DFSClient: DataStreamer Exception:
java.io.IOException: Unable to create new block.
08/06/12 14:44:52 WARN dfs.DFSClient: Error Recovery for block
blk_-8263828216969765661 bad datanode[0]


dont know what that means and didnt found something about that..
Hope somebody can help with that.

Thank you!
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