“Connection refused” Error for Namenode-HDFS (Hadoop Issue)

问题

All my nodes are up and running when we see using jps command, but still I am unable to connect to hdfs filesystem. Whenever I click on Browse the filesystem on the Hadoop Namenode localhost:8020 page, the error which i get is Connection Refused. Also I have tried formatting and restarting the namenode but still the error persist. Can anyone please help me solving this issue.

回答1:

Check whether all your services are running JobTracker, Jps, NameNode. DataNode, TaskTracker by running jps command.

Try to run start them one by one:

./bin/stop-all.sh
./bin/hadoop-daemon.sh start namenode
./bin/hadoop-daemon.sh start jobtracker
./bin/hadoop-daemon.sh start tasktracker
./bin/hadoop-daemon.sh start datanode

If you're still getting the error, stop them again and clean your temp storage directory. The directory details are in the config file ./conf/core-site.xml and the run,

./bin/stop-all.sh
rm -rf /tmp/hadoop*
./bin/hadoop namenode -format

Check the logs in the ./logs folder.

tail -200 hadoop*jobtracker*.log
tail -200 hadoop*namenode*.log
tail -200 hadoop*datanode*.log

Hope it helps.

回答2:

HDFS may use port 9000 under certain distribution/build.

please double check your name node port.

回答3:

Change the core-site.xml

   <property>
    <name>fs.default.name</name>
    <value>hdfs://hadoopvm:8020</value>
    <final>true</final>
   </property>

change to the ip adress .

<property>
<name>fs.default.name</name>
<value>hdfs://192.168.132.129:8020</value>
<final>true</final>
</property>

来源：https://stackoverflow.com/questions/15630460/connection-refused-error-for-namenode-hdfs-hadoop-issue

标签

Hadoop

HDFS