Tech Notes

Your project can be on or off. Your project's priority can be changed. Your job can be changed. But the technology is always heading north!

Sunday, August 31, 2014

Write ORC file

First of all, there is no way to write ORC file for hive-exec-0.12 or earlier version since OrcStruct is package private for these old ver...

Thursday, August 28, 2014

Access Hive collection type data in map reduce for Orc file

public void map(Object key, Writable value, Context context) throws IOException, InterruptedException { OrcStruct orcStruct =...

Friday, August 15, 2014

Troubleshooting version mismatch issue of map reduce job

When coding map reduce job and code to access Hadoop file system, you have to include hadoop jar files to make your java code to pass compil...

Monday, July 21, 2014

Assigning a static IP to a VMware Workstation VM

http://bytealmanac.wordpress.com/2012/07/02/assigning-a-static-ip-to-a-vmware-workstation-vm/ Assumption : the VM is running a DHCP clien...

Thursday, July 17, 2014

Cloudera CDH5 source code download

https://repository.cloudera.com/artifactory/public/org/apache/hadoop/hadoop-core/

Wednesday, July 2, 2014

zookeeper-env.sh issue when setting up HBase

Followed CDH4.2.2 installation guide to setup HBase. Ran "service zookeeper-server start" No error from command line. But zoo...

Wednesday, June 25, 2014

Eclipse debug step into, step over, etc. disappeared. How to bring them back?

http://stackoverflow.com/questions/12912896/eclipse-buttons-like-step-in-step-out-resume-etc-not-working

View web version

Powered by Blogger.