Connection Refused in Mapreduce sample about spring-hadoop-samples

[gmunumel]

Changed my core-site.xml solved the issue.

<configuration>
   <property>
      <name>fs.defaultFS</name>
      <value>hdfs://localhost:8020</value>
   </property>
</configuration>

Now I am facing a problem with:

org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /tmp/hadoop-yarn/staging/gabrielmunumel/.staging/job_1525387543266_0001/job.split could only be replicated to 0 nodes instead of minReplication (=1).  There are 0 datanode(s) running and no node(s) are excluded in this operation.
	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1559)

But this is another issue I guess.

[trisberg]

Looks like your cluster has some issues with the datanodes. Also, we have not used the framework with Hadoop 3 and have no plans on evolving it further, see notice at https://projects.spring.io/spring-hadoop/

[gmunumel]

Realized that. I have downgraded hadoop to version 2.6.

To solved the last issue I have removed my tmp dir and recreated with hdfs namenode -format. It is working now. The only issue is that the job hangs.

I will close the issue because seems not related to spring.