manas.tomar wrote:
I have set-up Hadoop on OpenSuse 11.2 VM using Virtualbox. I ran Hadoop
examples in the standalone mode successfully.
Now, I want to run in distributed mode using 2 nodes.
Hadoop starts fine and jps lists all the nodes. But when i try to put any file
or run any example, I get error. For e.g. :
had...@master:~/hadoop> ./bin/hadoop dfs -copyFromLocal ./input inputsample
10/04/17 14:42:46 INFO hdfs.DFSClient: Exception in createBlockOutputStream
java.net.SocketException: Operation not supported
10/04/17 14:42:46 INFO hdfs.DFSClient: Abandoning block blk_8951413748418693186_1080
....
10/04/17 14:43:04 INFO hdfs.DFSClient: Exception in createBlockOutputStream java.net.SocketException: Protocol not available
10/04/17 14:43:04 INFO hdfs.DFSClient: Abandoning block blk_838428157309440632_1081
10/04/17 14:43:10 WARN hdfs.DFSClient: DataStreamer Exception: java.io.IOException: Unable to create new block.
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2845)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2102)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2288)
10/04/17 14:43:10 WARN hdfs.DFSClient: Error Recovery for block
blk_838428157309440632_1081 bad datanode[0] nodes == null
10/04/17 14:43:10 WARN hdfs.DFSClient: Could not get block locations. Source file
"/user/hadoop/inputsample/check" - Aborting...
copyFromLocal: Protocol not available
10/04/17 14:43:10 ERROR hdfs.DFSClient: Exception closing file /user/hadoop/inputsample/check : java.net.SocketException: Protocol not available
java.net.SocketException: Protocol not available
at sun.nio.ch.Net.getIntOption0(Native Method)
at sun.nio.ch.Net.getIntOption(Net.java:178)
at sun.nio.ch.SocketChannelImpl$1.getInt(SocketChannelImpl.java:419)
at sun.nio.ch.SocketOptsImpl.getInt(SocketOptsImpl.java:60)
at sun.nio.ch.SocketOptsImpl.sendBufferSize(SocketOptsImpl.java:156)
at sun.nio.ch.SocketOptsImpl$IP$TCP.sendBufferSize(SocketOptsImpl.java:286)
at sun.nio.ch.OptionAdaptor.getSendBufferSize(OptionAdaptor.java:129)
at sun.nio.ch.SocketAdaptor.getSendBufferSize(SocketAdaptor.java:328)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.createBlockOutputStream(DFSClient.java:2873)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2826)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2102)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2288)
I can see the files on HDFS through the web interface but they are empty.
Any suggestion on how can I get over this ?
That is a very low-level socket error; I would file a bugrep on hadoop
and include all machine details, as there is something very odd about
your underlying machine or network stack that is stopping hadoop
tweaking TCP buffer sizes
