Hadoop - java.net.ConnectException: Connection refused

Question

I want connect to hdfs (in localhost) and i have a error:

Call From despubuntu-ThinkPad-E420/127.0.1.1 to localhost:54310 failed on connection exception: java.net.Connec

Answer 1

I was getting similar error. Upon checking I found that my namenode service was in stopped state.

check status of the namenode sudo status hadoop-hdfs-namenode

if its not in started/running state

start namenode service sudo start hadoop-hdfs-namenode

Do keep in mind that it takes time before name node service becomes fully functional after restart. It reads all the hdfs edits in memory. You can check progress of this in /var/log/hadoop-hdfs/ using command tail -f /var/log/hadoop-hdfs/{Latest log file}