Hadoop cluster setup - java.net.ConnectException: Connection refused

java hadoop configuration connectexception

For me these steps worked

java hadoop configuration connectexception

Hi Edit your conf/core-site.xml and change localhost to 0.0.0.0. Use the conf below. That should work.

<configuration>  <property> <name>fs.default.name</name> <value>hdfs://0.0.0.0:9000</value></property>

java hadoop configuration connectexception

From the netstat output you can see the process is listening on address 127.0.0.1

tcp        0      0 127.0.0.1:9000          0.0.0.0:*  ...

from the exception message you can see that it tries to connect to address 127.0.1.1

java.net.ConnectException: Call From marta-komputer/127.0.1.1 to localhost:9000 failed ...

further in the exception it's mentionend

For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused

on this page you find

Check that there isn't an entry for your hostname mapped to 127.0.0.1 or 127.0.1.1 in /etc/hosts (Ubuntu is notorious for this)

so the conclusion is to remove this line in your /etc/hosts

127.0.1.1       marta-komputer

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