Map Reduce

This section contains the documents that would help you in understanding MapReduce and Advance MapReduce concepts such as Counters, Schedulers, Custom Writables, Compression, Serialization, Tuning, Error Handling, and how to deal with complex MapReduce programs.

Error: "Class Not found Exception " while executing Map Reduce Program
We will be receiving this error mainly because while making the jar you might have not selected the class having the Main Method. To avoid this err...
Sat, 9 May, 2015 at 4:23 PM
Installing Eclipse on Cloudera/Ubuntu
Prerequisites: Java should be installed on that machine To check if Java is installed or not, give  Command: java -version  The ab...
Sat, 11 Oct, 2014 at 1:15 PM
Debugging Map Reduce Program
Prerequisites:  Java and Eclipse are installed Need a environment where hadoop and its daemons are running Usecase: How to Debug a Map Reduce ...
Sat, 11 Oct, 2014 at 2:49 PM
Detailed Explanation of Map Reduce code along with comments
Please refer to the below blog that describe the Wordcount in MRV2. http://www.edureka.co/blog/word-count-code-using-mrv2/ Please find the d...
Tue, 18 Nov, 2014 at 12:49 PM
Creating a jar file for Map Reduce Program
Please find below the steps to add the jar file. Right Click on the project name  --> Properties, once you click on properties a pop up windows c...
Tue, 18 Nov, 2014 at 12:48 PM
Error Standalone - Wordcount
Dear Learner, Please accept our sincere apologies for the delay in response. It seems that some jars are missing from your proj...
Sat, 2 Apr, 2016 at 12:57 PM
MapReduce Logs
Actually stdout only shows the System.out.println() of the non-map reduce classes.The System.out.pr...
Sat, 2 Apr, 2016 at 12:50 PM
Steps to run Sequence File Mapreduce Program
Dear Learner, We hope you are doing good. Please follow the steps to execute the program: (i) Create a directory in hdf...
Sat, 2 Apr, 2016 at 12:49 PM
Access Eclipse
Dear Karthik, Hope you are doing great. Please find the attached document for your reference. Please note if you are ...
Sat, 16 Apr, 2016 at 1:18 PM
MappingException
Dear Ramya, I hope you are doing good. The issue was with the Hibernate.cfg.xml as the property name mentioned in it incorrec...
Wed, 6 Jul, 2016 at 12:41 PM