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#ERROR: JAVA_HOME IS NOT SET MAC FOR PIG HOW TO#
#ERROR: JAVA_HOME IS NOT SET MAC FOR PIG MAC OSX#
#ERROR: JAVA_HOME IS NOT SET MAC FOR PIG INSTALL#

Hadoop Wiki: How to Setup Your Development Environmentġ2/07/18 21:10:38 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020.

Also see above additional notes to make sure that there are 5 processes running. I misspelled mapread to mapred (missing second a).

Jobtracker not starting: I stumbled across this problem and found that there was a spelling mistake in mapread-site.xml.

Mostly likely this problem is because SSH to localhost not available

could only be replicated to 0 nodes, instead of 1: Refer Step 3.

Unable to load realm info from SCDynamicStore: Refer step 2.1.

There are 5 processes associated with hadoop and one pertaining to the last command

Verify hadoop started properly: Use ps ax | grep hadoop | wc -l and make sure you see 6 as output.

Stop hadoop cluster: /usr/local/Cellar/hadoop/1.0.1/bin/stop-all.sh.

Starting hadoop cluster: ‘/usr/local/Cellar/hadoop/1.0.1/bin/start-all.sh’.

Log files are located at /usr/local/Cellar/hadoop/1.0.1/libexec/logs/*.log Additional Notes If you see less than 6 processes then check log files. To make sure that all hadoop processes started, use the following command Hadoop jar /usr/local/Cellar/hadoop/1.0.1/libexec/hadoop-examples-1.0.1.jar pi 10 100 usr/local/Cellar/hadoop/1.0.1/bin/start-all.sh If you get any error remove (or change to something else) ~/.ssh/known_hosts and retry connecting to localhost. (see Raj Bandyopadhay’s comment)Ĭat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys Make sure that authorized_key has 0600 permission. Step 3.2: From the terminal run the following command. Step 3.1: Make sure that “Remote login” is enabled in your system preferences. However instructions below assume that you have used rsa key.

Instead of using rsa key, you can also use dsa (replace rsa with dsa in the command below). If you are missing the above two files, then run the following command (Thanks to Ryan Rosario for pointing out this). Make sure that you have ssh private (~/.ssh/id_rsa) and public (~/.ssh/id_rsa.pub) keys already setup. Step 2.4: Add the following content in the /usr/local/Cellar/hadoop/1.0.1/libexec/conf/hdfs-site.xml Step 2.3: Add the following content in the /usr/local/Cellar/hadoop/1.0.1/libexec/conf/mapred-site.xml You don’t need to create this folder as it will be automatically created for you in the later stages. Note that we are setting the hdfs in current user’s folder and naming it as hadoop-store. Step 2.2:Add the following content in the /usr/local/Cellar/hadoop/1.0.1/libexec/conf/core-site.xml. This line is required to overcome the following error related “SCDynamicStore”, expecially “Unable to load realm info from SCDynamicStore”Įxport HADOOP_OPTS="=OX.AC.UK =kdc0.ox.ac.uk:kdc1.ox.ac.uk" Step 2.1 Add following line to /usr/local/Cellar/hadoop/1.0.1/libexec/conf/hadoop-env.sh.

#ERROR: JAVA_HOME IS NOT SET MAC FOR PIG INSTALL#

Below I am using homebrew to install hadoop. It really makes installing and uninstalling softwares effortless and keeps your machine clean of unused files. If you haven’t heard about homebrew, then you should definitely give it a try. Edit hadoop-env.sh to handle SCDyanmicStore related errors.Please refer below mentioned references for details.

#ERROR: JAVA_HOME IS NOT SET MAC FOR PIG MAC OSX#

Here are some quick notes on how to set hadoop on Mac OSX Lion. Although you are likely to run hadoop on a big cluster of computers, it useful to have it locally installed for debugging and testing purpose.