I already installed Hadoop on my machine \"Ubuntu 13.05\" and now I have an error when browsing localhost:50070 the browser says that the page does not exist.
if you are running and old version of Hadoop (hadoop 1.2) you got an error because http://localhost:50070/dfshealth.html does'nt exit. Check http://localhost:50070/dfshealth.jsp which works !
If you can open the http://localhost:8088/cluster but can't open http://localhost:50070/. Maybe datanode didn't start-up or namenode didn't formate.
Hadoop version 2.6.4
check whether your namenode has been formated, if not type:
$ stop-all.sh
$ /path/to/hdfs namenode -format
$ start-all.sh
check your namenode tmp file path, to see in /tmp
, if the namenode directory is in /tmp
, you need set tmp path in core-site.xml
, because every time when you reboot or start your machine, the files in /tmp
will be removed, you need set a tmp dir path.
add the following to it.
<property>
<name>hadoop.tmp.dir</name>
<value>/path/to/hadoop/tmp</value>
</property>
check step 2, stop hadoop and remove the namenode tmp dir in /tmp
, then type /path/to/hdfs namenode -format
, and start the hadoop. The is also a tmp
dir in $HADOOP_HOME
If all the above don't help, please comment below!
Since Hadoop 3.0.0 - Alpha 1 there was a Change in the port configuration:
http://localhost:50070
was moved to
http://localhost:9870
see https://issues.apache.org/jira/browse/HDFS-9427
After installing and configuring Hadoop, you can quickly run the command netstat -tulpn
to find the ports open. In the new version of Hadoop 3.1.3 the ports are as follows:-
localhost:8042 Hadoop, localhost:9870 HDFS, localhost:8088 YARN
port 50070 changed to 9870 in 3.0.0-alpha1
In fact, lots of others ports changed too. Look:
Namenode ports: 50470 --> 9871, 50070 --> 9870, 8020 --> 9820
Secondary NN ports: 50091 --> 9869, 50090 --> 9868
Datanode ports: 50020 --> 9867, 50010 --> 9866, 50475 --> 9865, 50075 --> 9864
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